Updated on 2026/09/25

写真a

 
AOYAGI Yoshiteru
 
Organization
School of Science and Engineering Professor
Contact information
The inquiry by e-mail is 《here》
External link

Degree

  • 博士(工学) ( 慶應義塾大学 )

  • 修士(工学) ( 慶應義塾大学 )

Education

  • 2006.9
     

    Keio University   doctor course   completed

  • 2003.3
     

    Keio University   master course   completed

  • 2001.3
     

    Keio University   graduated

Research History

  • 2026.4 - Now

    Chuo University   School of Science and Engineering   Professor

  • 2012.2 - 2026.3

    Tohoku University   Department of Finemechanics   Associate Professor

  • 2018.9 - 2019.8

    Georgia Institute of Technology   George W. Woodruff School of Mechanical Engineering   Visiting Scholar

  • 2009.4 - 2012.3

    Waseda University   Department of Modern Mechanical Engineering   Part-time lecturer

  • 2009.4 - 2012.1

    Japan Atomic Energy Agency (JAEA)   Nuclear Science and Engineering Directorate   Researcher

  • 2007.4 - 2009.3

    Keio University   Department of Mechanical Engineering   Assistant professor

  • 2006.4 - 2007.3

    Keio University   Department of Mechanical Engineering   Assistant professor

  • 2005.10 - 2006.3

    Kobe University   Graduate School of Engineering Faculty of Engineering   Academic Researcher

  • 2003.10 - 2005.9

    Keio University   The 21st Century Center of Excellence Program   Research Assistant

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Professional Memberships

  • 2019.7 - Now

    The Minerals, Metals & Materials Society

  • 2008.10 - Now

    日本金属学会

  • 2004.4 - Now

    日本材料学会

  • 2001.10 - Now

    日本機械学会

Research Interests

  • High Entropy Alloy

  • Grain Boundary

  • Crystal Plasticity

  • Ultrafine-Grained Metals

  • Dislocation

  • Polymer

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials

Papers

  • Frequency-dependent stress response under thermal cycle: A thermal-crystal plasticity and dynamic mode decomposition study Reviewed

    Haruki Ohashi, Yoshiteru Aoyagi

    International Journal of Plasticity   202   104722.1 - 31   2026.7

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    DOI: 10.1016/j.ijplas.2026.104722

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  • Atomistic and Continuum Models for Deformation of Irradiated Metals Reviewed

    Tomohito TSURU, Yoshiteru AOYAGI and Yoshiyuki KAJI

    材料   75 ( 2 )   128 - 133   2026.2

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  • 溝ロール圧延Cu–Zn–Siヘテロナノ合金棒の組織と機械的特性に及ぼす溝形状の影響 Reviewed

    三浦博己, 大橋春希, 青柳吉輝, 渡邉大河, 小林正和, 渡邊千尋

    銅と銅合金   64 ( 1 )   32 - 37   2025.10

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  • Modeling of nonlinear viscoelastic-viscoplastic behavior of glassy polymers based on intramolecular rotation of molecular chains Reviewed

    Yoshiteru Aoyagi, Louis Narita Camboulives

    International Journal of Plasticity   189   104328;1 - 25   2025.4

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    DOI: 10.1016/j.ijplas.2025.104328

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  • Strengthening Mechanisms of Heterogeneous Nano-Structured Cu-Zn-Si Alloy Bars Fabricated by Caliber Rolling Reviewed

    Hiromi Miura, Yoshitake Matsuo, Yojiro Oba, Yoshiteru Aoyagi and Chihiro Watanabe

    Materials Transactions   66 ( 3 )   283 - 291   2025.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Institute of Metals  

    DOI: 10.2320/matertrans.mt-d2024008

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  • 超微小荷重に起因する寸法効果影響を排除した押込み試験結果に基づく応力-ひずみ関係の推定手法の開発 Reviewed

    坂巻巧, 西本圭佑, 西村将暉, 青柳吉輝

    鉄と鋼   110 ( 11 )   860 - 870   2024.9

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2355/tetsutohagane.TETSU-2024-045

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  • Crystal Plasticity Finite Element Simulation Considering Geometrically Necessary Dislocation Distribution for Reproducing Mechanical Anisotropy of Rolled CrMnFeCoNi High-Entropy Alloy Reviewed

    Nomun Gerel-Erdene and Yoshiteru Aoyagi

    Materials Transactions   65 ( 9 )   1008 - 1014   2024.9

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    DOI: 10.2320/matertrans.MT-MA2024006

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  • ヘテロナノ組織Cu-Zn-Si合金溝ロール圧延棒材の強化機構 Reviewed

    三浦博己, 松尾潔剛, 大場洋次郎, 青柳吉輝, 渡邊千尋

    銅と銅合金   63 ( 1 )   56 - 64   2024.8

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  • ヘテロナノ組織Cu–Zn–Si合金溝ロール圧延棒材の低温焼鈍と再結晶組織 Reviewed

    三浦博己, 松尾潔剛, 大場洋次郎, 小林正和, 青柳吉輝, 渡邊千尋, Taworn Benjanarasuth

    銅と銅合金   63 ( 1 )   82 - 87   2024.8

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  • 圧延誘起加工組織に起因する力学的異方性を再現する結晶塑性シミュレーション Reviewed

    青柳吉輝, 柳沼雄介

    材料   72 ( 11 )   774 - 781   2023.11

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  • Reproduction Method of Mechanical Anisotropy Induced by Cold Rolling in Crystal Plasticity FE Simulation

    Yusuke Yaginuma and Yoshiteru Aoyagi

    Proceedings of 15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics   099:1 - 8   2022.7

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  • Spherulite Microstructure Formation Simulation Based on Effect of Molding Conditions on Polylactic Acid

    Hong Liqin, Koichi Tatsuno and Yoshiteru Aoyagi

    Proceedings of 15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics   107:1 - 12   2022.7

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  • Age-hardening mechanisms of heterogeneous-nanostructured SUS316LN stainless steel fabricated by heavy cold rolling Reviewed

    Hiromi Miura, Chihiro Watanabe, Yoshiteru Aoyagi, Yojiro Oba, Masakazu Kobayashi, Naoki Yoshinaga

    Materials Science and Engineering: A   833   142531;1 - 12   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.msea.2021.142531

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  • Effect of hetero- and homo-nanostructure on the hydrogen embrittlement resistance in heavily deformed 316LN austenitic stainless steel Reviewed

    F.J. Mweta, N. Adachi, Y. Todaka, H. Sato, H. Miura, M. Kobayashi, C. Watanabe, Y. Aoyagi

    MRS Advances   6 ( 27 )   682 - 688   2021.9

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1557/s43580-021-00122-0

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  • Simulated Microstructure Effects on Macroscopic Mechanical Properties Based on Multiscale Crystal Plasticity Reviewed

    Yoshiteru Aoyagi, Ryota Kobayashi, David L. McDowell

    Forming the Future Proceedings of the 13th International Conference on the Technology of Plasticity   253 - 262   2021.7

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  • Effects of Strain Rate on Mechanical Properties of Heterogeneous Nano-Structured SUS316LN Stainless Steel: Revealed by In-Situ X-Ray Diffraction at Synchrotron Radiation Facility Reviewed

    Hua JIANG, Chihiro WATANABE, Yoji MIYAJIMA, Norimitsu KOGA, Yoshiteru AOYAGI, Masakazu KOBAYASHI, Hiromi MIURA

    Materials Science and Engineering: A   815   141251;1 - 8   2021.5

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    DOI: 10.1016/j.msea.2021.141221

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  • 強冷間圧延によりヘテロナノ組織を発達させたSUS316LNステンレス鋼板材の疲労特性 Reviewed

    小林正和, 岩間翔平, 渡邊千尋, 青柳吉輝, 三浦博己

    鉄と鋼   106 ( 7 )   507 - 516   2020.6

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  • Characterization of heterogeneous-nano structure in austenitic stainless steel: crystal orientations and hardness distribution Reviewed

    Norimitsu Koga, Shinya Suzuki, Hua Jiang, Chihiro Watanabe, Yoshiteru Aoyagi, Masakazu Kobayashi, Hiromi Miura

    Journal of Materials Science   55   9299 - 9310   2020.4

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    DOI: 10.1007/s10853-020-04643-1

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  • Heterogeneous nano-structure and its evolution in heavily cold-rolled SUS316LN stainless steels Reviewed

    Chihiro WATANABE, Shuhei KOBAYASHI, Yoshiteru AOYAGI, Yoshikazu TODAKA, Masakazu KOBAYASHI, Natsuko SUGIURA, Naoki YOSHINAGA and Hiromi MIURA

    ISIJ International   60 ( 3 )   582 - 589   2020.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Iron and Steel Institute of Japan  

    DOI: 10.2355/isijinternational.isijint-2019-445

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  • Modeling of Twinning-Induced Plasticity of High Entropy Alloy Based on Crystal Plasticity Reviewed

    Takuya Tsukuda, Yoshiteru Aoyagi

    Proceedings of The 10th Pacific Rim International Conference on Advanced Materials and Processing   866 - 871   2019.8

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  • Multiscale Simulation Based on Macroscopic Deformation Model Predicted by Microstructure Information of Ultrafine-Grained Metals Reviewed

    Yoshiteru Aoyagi, Atsushi Sagara, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka, Hiromi Miura

    Proceedings of The 10th Pacific Rim International Conference on Advanced Materials and Processing   879 - 885   2019.8

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  • 冷間強圧延したSUS316LN鋼のヘテロナノ組織とその形成過程 Reviewed

    渡邊千尋, 小林秀平, 青柳吉輝, 戸髙義一, 小林正和, 杉浦夏子, 吉永直樹, 三浦博己

    鉄と鋼   105 ( 2 )   254 - 261   2019.2

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  • 強圧延誘起ヘテロナノ組織がオーステナイト系ステンレス鋼の力学特性に与える影響に関する結晶塑性シミュレーション Reviewed

    青柳吉輝, 渡邊千尋, 小林正和, 戸髙義一, 三浦博己

    鉄と鋼   105 ( 2 )   262 - 271   2019.2

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  • 冷間強圧延によりヘテロナノ組織を付与した二相ステンレス鋼の疲労破壊 Reviewed

    山崎恭和, 小林正和, 戸髙義一, 渡邊千尋, 青柳吉輝, 三浦博己

    鉄と鋼   105 ( 2 )   272 - 281   2019.2

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  • Crystal Plasticity Simulation Considering Microstructures of Austenitic Stainless Steel on Macroscopic Yield Function Reviewed

    Yoshiteru Aoyagi, Atsushi Sagara, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    Materials Science Forum   941   212 - 217   2018.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.4028/www.scientific.net/MSF.941.212

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  • 単純強圧延オーステナイト系ステンレス鋼中のヘテロナノ組織が集合組織と延性に及ぼす影響 Reviewed

    三浦博己,小林正和,戸髙義一,渡邊千尋,青柳吉輝

    日本金属学会誌   81 ( 12 )   536 - 541   2017.12

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    DOI: 10.2320/jinstmet.JC201702

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  • Multiscale Crystal Plasticity Modeling Considering Nucleation of Dislocations Based on Thermal Activation Process on Ultrafine-grained Aluminum Reviewed

    Y Aoyagi

    IOP Conference Series: Materials Science and Engineering   194   12048:1 - 6   2017.5

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1088/1757-899X/194/1/012048

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  • ポリプロピレン結晶相の弾性異方性およびすべり系に関する分子動力学シミュレーション Reviewed

    柘植洋太, 青柳吉輝

    日本機械学会論文集   83 ( 848 )   16-00525:1 - 20   2017.4

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    Authorship:Last author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Mechanical Engineers  

    <p>Thermoplastic polymers are expected to be used as a matrix for fiber reinforced plastics due to their high formability and recyclability. Particularly, thermoplastic crystalline polymers have a hierarchical structure composed of crystalline phase and amorphous phase. In order to describe large deformation behavior of crystalline polymers, the polymer multiscale models considering these structures have been developed over the past few decades. However, the mechanism of plastic deformation and material parameters of crystalline phase such as anisotropic elastic coefficients, slip systems and critical resolved shear stress of each slip system have been unclear because of its difficulty of experimental measurement. In this study, we used molecular dynamics method to investigate the microscopic deformation behavior and determine the material parameters of crystalline phase of α-isotactic polypropylene (iPP). We reproduced crystalline phase of α-iPP numerically and applied various kinds of deformation. As a result, we determined thirteen anisotropic elastic coefficients. Each value was different, which means that crystalline phase of α-iPP has elastic anisotropy. Moreover observing plastic deformation behavior of molecular chain slip, we found that crystalline phase has six slip systems, i.e., longitudinal slip and transverse slip on three slip planes. We identified the critical resolved shear stress of each slip system from stress-strain responses. Finally, we performed finite element analysis on single crystal of α-iPP using the material parameters obtained by molecular dynamics simulations, which exhibited macroscopic anisotropy in elasticity and yielding.</p>

    DOI: 10.1299/transjsme.16-00525

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  • Heterogeneous nanostructure developed in heavily cold-rolled stainless steels and the specific mechanical properties Reviewed

    H. Miura, M. Kobayashi, Y. Todaka, C. Watanabe, Y. Aoyagi, N. Sugiura, N. Yoshinaga

    Scripta Materialia   133   33 - 36   2017.2

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    DOI: 10.1016/j.scriptamat.2017.02.016

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  • Macroscopic Yield Function Predicted by Crystal Plasticity Simulation on Ultrafine-grained Aluminum Reviewed

    Yoshiteru Aoyagi

    Key Engineering Materials   725   249 - 254   2017.1

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Trans Tech Publications Ltd  

    DOI: 10.4028/www.scientific.net/KEM.725.249

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  • MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ROLLING PROCESS FOR PRODUCTION OF HETERO-NANOSTRUCTURED STAINLESS STEELS

    Yoshiteru Aoyagi, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    Proceedings of PLASTICITY '17: The Twenty Third International Conference on Plasticity, Damage, and Fracture   118 - 120   2017.1

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  • Molecular Dynamics Simulation on Microscopic Plastic Deformation Behavior of Crystalline Phase of Polypropylene Reviewed

    Yota TSUGE, Yoshiteru AOYAGI

    Proceedings of International Conference on Asia-Pacific Conference on Fracture and Strength 2016 (APCFS2016)   465 - 466   2016.9

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  • Multiscale Simulation on Effect of Hetero-nanostructure on Mechanical Properties of Severe Rolled Stainless Steel Reviewed

    Yoshiteru Aoyagi, Tomoki Uoji, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    Proceedings of The 9th Pacific Rim International Congress on Advanced Materials and Processing (PRICM9)   254 - 255   2016.8

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  • Atomic scale simulations of relationship between macroscopic mechanical properties and microscopic defect evolution in ultrafine-grained metals Reviewed

    Tomohito Tsuru, Yoshiteru Aoyagi and Tomotsugu Shimokawa

    Materials Transactions   57 ( 9 )   1476 - 1481   2016.6

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    DOI: 10.2320/matertrans.MH201515

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  • Heterogeneous plastic deformation and Bauschinger effect in ultrafine-grained metals: Atomistic simulations Reviewed

    Tomohito Tsuru, Yoshiteru Aoyagi, Yoshiyuki Kaji and Tomotsugu Shimokawa

    Modelling and Simulation in Materials Science and Engineering   24   35010:1 - 10   2016.2

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    DOI: 10.1088/0965-0393/24/3/035010

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  • 超微細結晶粒アルミニウムの巨視的降伏挙動に関する結晶塑性シミュレーション Reviewed

    青柳吉輝

    日本機械学会論文集   82 ( 834 )   15-00396:1 - 13   2016.1

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    High-strength, light-weight metal materials are required to improve safety and reduce transportation cost. Ultrafine-grained metals produced by severe plastic deformation have attracted interest as high-strength materials. In the case of ultrafine-grained metals, strong rolling texture induced by severe plastic deformation influences anisotropy of yield surface remarkably. However, measurement for the yield surface of ultrafine-grained metals requires a great deal of labor. A computational model predicting the yield surfaces of ultrafine-grained metals is desired in the field of materials science and engineering. In this study, using results obtained by electron backscatter diffraction, information on crystal orientation and shape of grains are introduced into a computational model for multiscale crystal plasticity simulation considering the effects of grain boundaries and dislocation sources. Finite element simulations for polycrystal of aluminum under biaxial tension are performed in order to predict yield surface of the ultrafine-grained metal. A genetic algorithm is used to derive the higher-ordered yield function of ultrafine-grained metal. The effects of crystal orientation on the macroscopic mechanical properties of the ultrafine-grained metals are investigated by the obtained numerical results.

    DOI: 10.1299/transjsme.15-0039

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  • Atomistic simulations of yield process and plastic deformation in bulk nanostructured metals Reviewed

    Tomohito Tsuru, Yoshiteru Aoyagi, Yoshiyuki Kaji, Tomotsugu Shimokawa

    Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM)   ICON23-1582:1 - 4   2015.5

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  • 粒界の力学特性に関するインデンテーション試験および結晶塑性シミュレーション Reviewed

    青柳吉輝, 佐久間翔

    材料   64 ( 4 )   287 - 294   2015.4

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Society of Materials Science Japan  

    DOI: 10.2472/jsms.64.287

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  • MULTISCALE PLASTICITY SIMULATION ON CRYSTALLINE POLYMER CONSIDERING SPHERULITE STRUCTURE OF POLYPROPYLENE

    Yoshiteru Aoyagi, Atsushi Inoue, Toshiki Sasayama and Yoshinori Inoue

    Proceedings of Plasticity '15: the 21th International Symposium on Plasticity and Its Current Applications   61 - 63   2015.1

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  • Multiscale plasticity simulation considering spherulite structure of polypropylene Reviewed

    Yoshiteru AOYAGI, Atsushi INOUE, Toshiki SASAYAMA and Yoshinori INOUE

    Mechanical Engineering Journal   1 ( 6 )   CM0062:1 - 11   2014.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Mechanical Engineers  

    accepted

    DOI: 10.1299/mej.2014cm0062

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  • Crystal plasticity modeling and simulation considering the behavior of the dislocation source of ultrafine-grained metal Reviewed

    Y. Aoyagi, T. Tsuru and T. Shimokawa

    International Journal of Plasticity   55   43 - 57   2014.4

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    DOI: 10.1016/j.ijplas.2013.09.009

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  • Phase-field simulation of static recrystallization considering nucleation from subgrains and nucleus growth with incubation period Reviewed

    M. Muramatsu, Y. Aoyagi, Y. Tadano, K. Shizawa

    Computational Materials Science   87   112 - 122   2014.3

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    DOI: 10.1016/j.commatsci.2014.02.003

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  • 超微細粒金属の機械特性に対する粒内転位生成と粒界におけるすべり伝播の影響 Reviewed

    都留智仁, 青柳吉輝, 加治芳行, 下川智嗣

    日本金属学会誌   78 ( 1 )   45 - 51   2014.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/jinstmet.J2013039

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  • CRYSTAL PLASTICITY SIMULATION CONSIDERING THE EFFECT OF THE DISLOCATION SOURCE ON YIELD BEHAVIOR

    Yoshiteru Aoyagi, Tomohito Tsuru and Tomotsugu Shimokawa

    Proceedings of Plasticity '14: the 20th International Symposium on Plasticity and Its Current Applications   1 - 3   2014.1

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  • Prediction of failure properties of injection-molded short glass fiber-reinforced polyamide 6,6 Reviewed

    Toshiki Sasayama, Tomonaga Okabe, Yoshiteru Aoyagi, Masaaki Nishikawa

    Composites Part A   52   45 - 54   2013.9

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    DOI: 10.1016/j.compositesa.2013.05.004

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  • Influence of Competition between Intragranular Dislocation Nucleation and Intergranular Slip Transfer on Mechanical Properties of Ultrafine -Grained Metals Reviewed

    Tomohito Tsuru, Yoshiteru Aoyagi, Yoshiyuki Kaji and Tomotsugu Shimokawa

    Materials Transactions   54 ( 9 )   1580 - 1586   2013.9

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    DOI: 10.2320/matertrans.MH201313

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  • Modeling and simulation on ultrafine-graining based on multiscale crystal plasticity considering dislocation patterning Reviewed

    Y. Aoyagi, R. Kobayashi, Y. Kaji, K. Shizawa

    International Journal of Plasticity   47   13 - 28   2013.8

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    DOI: 10.1016/j.ijplas.2012.12.007

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  • ショットピーニングによる歯科用材料の機械的特性の向上 Reviewed

    青柳吉輝, 河原木雄介, 徳江藍, 大久保力廣, 髙桑脩, 祖山均

    日本機械学会論文集A編   79 ( 803 )   1019 - 1029   2013.7

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    DOI: 10.1299/kikaia.79.1019

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  • A Phenomenological Micromechanical Model of FCC Metals under Radiation Induced Crystal Defects Reviewed

    Yoshiteru Aoyagi, Tomohito Tsuru, and Yoshiyuki Kaji

    ASTM STP Effects of Radiation on Nuclear Materials: 25th Volume   1547   269 - 287   2013.1

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    DOI: 10.1520/STP103983

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  • CRYSTAL PLASTICITY MODELING AND SIMULATION CONSIDERING EFFECT OF GRAIN BOUNDARY OF ULTRAFINE-GRAINED METAL

    Yoshiteru Aoyagi, Tomohito Tsuru and Tomotsugu Shimokawa

    Proceedings of Plasticity '13: the 19th International Symposium on Plasticity and Its Current Applications   1 - 3   2013.1

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  • 再結晶現象における結晶核と母相に対する混相理論としての保存則の定式化 Reviewed

    村松眞由, 青柳吉輝, 志澤一之

    日本機械学会論文集A編   78 ( 789 )   742 - 757   2012.5

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    DOI: 10.1299/kikaia.78.742

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  • Simulation on Nanostructured Metals Based on Multiscale Crystal Plasticity Considering Effect of Grain Boundary Reviewed

    Yoshiteru Aoyagi, Tomotsugu Shimokawa, Kazuyuki Shizawa and Yoshiyuki Kaji

    Materials Science Forum   706-709   1751 - 1756   2012.1

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    DOI: 10.4028/www.scientific.net/MSF.706-709.1751

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  • Crystal Plasticity Simulation Considering Oxidation along Grain Boundary and Effect of Grain Size on Stress Corrosion Cracking Reviewed

    Yoshiteru Aoyagi and Yoshiyuki Kaji

    Materials Transactions   53 ( 1 )   161 - 166   2012.1

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    DOI: 10.2320/matertrans.MD201126

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  • A DYNAMIC RECRYSTALLIZATION SIMULATION BASED ON PHASE-FIELD AND DISLOCATION-CRYSTAL PLASTICITY MODELS

    MAYU MURAMATSU, SHINICHI SATO, YOSHITERU AOYAGI AND KAZUYUKI SHIZAWA

    Proceedings of COMPLAS XI   587 - 593   2011.9

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  • 再結晶現象に対する結晶格子スケールの離散的保存則の定式化 Reviewed

    村松眞由, 青柳吉輝, 志澤一之

    日本機械学会論文集A編   77 ( 780 )   1304 - 1319   2011.8

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    DOI: 10.1299/kikaia.77.1304

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  • Stress Corrosion Cracking Behavior of Type 304 Stainless Steel Irradiated under Different Neutron Dose Rates at JMTR

    Yoshiyuki Kaji, Keietsu Kondo, Yoshiteru Aoyagi, Yoshiaki Kato, Taketoshi Taguchi, Fumiki Takada, Junichi Nakano, Hirokazu Ugachi, Takashi Tsukada, Kenichi Takakura and Hiroshi Sakamoto

    Proceedings of 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors   1203 - 1216   2011.8

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  • 転位パターニングに基づく結晶粒超微細化に関するマルチスケール結晶塑性シミュレーション Reviewed

    青柳吉輝, 小林遼太郎, 志澤一之

    日本機械学会論文集A編   77 ( 775 )   448 - 461   2011.3

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    Ultrafine-grained metals whose grain size is less than one micron have attracted interest as high strength materials. However, a mechanism of ultrafine-graining based on evolution of dislocation structures has not been clarified. In this study, we derive reaction-diffusion equations for dislocation patterning of dislocation cell structures and subgrains. In order to express the generation of dislocation pattern responding to deformation progress, information of slip rate and stress and effect of interactions between slip systems on formation of cell structures are introduced into the reaction rate coefficients of reaction-diffusion equations. Moreover, we propose a multiscale crystal plasticity model based on dislocation patterning. Then we carry out two-dimensional FE-FD simulation for severe compression of FCC polycrystal using the present model. Some processes of ultrafine-graining, i.e., generation of dislocation cell structures, subgrains, dense dislocation walls and lamella subdivisions with high angle boundary is numerically reproduced, and we investigate the effect of dislocation behaviors on the processes of ultrafine-graining.

    DOI: 10.1299/kikaia.77.448

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  • MODELING AND SIMULATION ON IRRADIATED MATERIAL BASED ON CRYSTAL PLASTICITY CONSIDERING CRYSTAL DEFECT INDUCED BY IRRADIATION

    Yoshiteru Aoyagi and Yoshiyuki Kaji

    Proceedings of Plasticity '11: the 17th International Symposium on Plasticity and Its Current Applications   1 - 3   2011.1

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  • FCC超微細粒焼鈍材の降伏点降下現象に関するトリプルスケール転位-結晶塑性シミュレーション Reviewed

    黒澤瑛介, 青柳吉輝, 志澤一之

    日本機械学会論文集A編   76 ( 772 )   1547 - 1556   2010.12

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    DOI: 10.1299/kikaia.76.1547

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  • サブグレインからの核生成と核成長に関する静的再結晶Phase-Fieldシミュレーション Reviewed

    村松眞由, 味岡秀恭, 青柳吉輝, 只野裕一, 志澤一之

    材料   59 ( 11 )   853 - 860   2010.11

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    DOI: 10.2472/jsms.59.853

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  • MULTIPHYSICS MODELING AND SIMULATION FOR STRESS CORROSION CRACKING CONSIDERING OXYGEN ATOM DIFFUSION ALONG GRAIN BOUNDARY

    Takahiro IGARASHI, Yoshiteru AOYAGI and Yoshiyuki KAJI

    Proceedings of The 18th International Conference on Nuclear Engineering   1 - 5   2010.5

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  • トリプルスケール結晶塑性モデリングおよび結晶粒微細化に伴う寸法効果に関するシミュレーション Reviewed

    黒澤瑛介, 青柳吉輝, 只野裕一, 志澤一之

    日本機械学会論文集A編   76 ( 764 )   483 - 492   2010.4

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    In this paper, a triple-scale crystal plasticity model bridging three hierarchical material structures, i.e., dislocation structure, grain aggregate and practical macroscopic structure is developed. Geometrically necessary (GN) dislocation density and GN incompatibility are employed so as to describe isolated dislocations and dislocation pairs in a grain, respectively. Then the homogenization method is introduced into the GN dislocation-crystal plasticity model for derivation of the governing equation of macroscopic structure with the mathematical and physical consistencies. Using the present model, a triple-scale FE simulation bridging the above three hierarchical structures is carried out for f.c.c. polycrystals with different mean grain size. It is shown that the present model can qualitatively reproduce size effects of macroscopic specimen with ultrafine-grain, i.e., the increase of initial yield stress, the decrease of hardening ratio after reaching tensile strength and the reduction of tensile ductility with decrease of its grain size. Moreover, the relationship between macroscopic yielding of specimen and microscopic grain yielding is discussed and the mechanism of the poor tensile ductility due to fine-graining is clarified.

    DOI: 10.1299/kikaia.76.483

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  • Field Theory-Based Prediction of Evolving Incompatibility Tensor Field under Wedge Indentation -Simulation Based on Field Theory of Multiscale Plasticity-

    Yoshiteru Aoyagi, Yusuke Tsunemi and Tadashi Hasebe

    Proceedings of KSME-JSME Joint Symposium 2010 on Computational Mechanics and Computer-Aided Engineering   23 - 24   2010.3

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  • A 3D MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON DISLOCATION PATTERNING

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '10: the 16th International Symposium on Plasticity and Its Current Applications   1 - 3   2010.1

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  • MULTISCALE MODELING AND SIMULATION ON DYNAMIC RECRYSTALLIZATION BASED ON PHASE-FIELD METHOD AND DISLOCATION-CRYSTAL PLASTICITY THEORY

    Mayu Muramatsu, Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '10: the 16th International Symposium on Plasticity and Its Current Applications   10 - 12   2010.1

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  • A TRIPLE-SCALE GN DISLOCATION-CRYSTAL PLASTICITY SIMULATION ON MECHANICAL PROPERTIES OF ULTRAFINE-GRAINED METAL

    Eisuke Kurosawa, Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '10: the 16th International Symposium on Plasticity and Its Current Applications   4 - 6   2010.1

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  • MULTISCALE CRYSTAL PLASTICITY MODELING AND SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON EVOLUTION OF DISLOCATION STRUCTURES

    R. Kobayashi, Y. Aoyagi and K. Shizawa

    Proceedings of COMPLAS X   p568:1 - 4   2009.9

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  • A TRIPLE SCALE SIMULATION ON SIZE-EFFECTS OF ULTRAFINE-GRAINED METAL BASED ON GEOMETRICALLY NECESSARY CRYSTAL DEFECTS

    Kazuyuki Shizawa, Eisuke Kurosawa and Yoshiteru Aoyagi

    Proceedings of Plasticity '09: the 15th International Symposium on Plasticity and Its Current Applications   349 - 351   2009.1

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  • A PSEUDO-3D MULTISCALE SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON EVOLUTION OF DISLOCATION STRUCTURES

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '09: the 15th International Symposium on Plasticity and Its Current Applications   337 - 339   2009.1

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  • Reproducing kernel based evaluation of incompatibility tensor in field theory of plasticity Reviewed

    Y. Aoyagi, T. Hasebe, P. C. Guan and J. S. Chen

    Interaction and Multiscale Mechanics   1 ( 4 )   423 - 435   2008.12

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  • A triple-scale crystal plasticity simulation on yield behavior of annealed FCC fine-grained metals Reviewed

    Eisuke Kurosawa, Yoshiteru Aoyagi, Yuichi Tadano and Kazuyuki Shizawa

    Materials Science Forum   584-586   1027 - 1032   2008.8

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  • Multiscale Crystal Plasticity Simulation with Pseudo-Three-Dimensional Model on Ultrafine-Graining Based on Evolution of Dislocation Structures Reviewed

    Yoshieru Aoyagi, Naohiro Horibe and Kazuyuki Shizawa

    Materials Science Forum   584-586   1057 - 1062   2008.8

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  • A Dislocation-Crystal Plasticity Simulation on FCC Single Crystal Considering Geometrically Necessary Dislocation Density and Incompatibility Reviewed

    Yoshiteru AOYAGI and Kazuyuki SHIZAWA

    Journal of Computational Science and Technology   2 ( 1 )   197 - 209   2008.6

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    In the previous paper, the geometrically necessary (GN) incompatibility is newly defined and a new annihilation term of dislocation pairs due to the dynamic recovery is introduced into an expression of dislocation density. Furthermore, a multiscale model of crystal plasticity is proposed by considering the GN dislocation density and incompatibility. However, details of dislocation-crystal plasticity calculation are not given. In this paper, we explain a method of dislocation-crystal plasticity analysis. A finite element simulation is carried out for an f.c.c. single crystal under plane strain tension. It is numerically predicted that micro shear bands are formed at large strain, and sub-GNBs: small angle tilt boundaries are induced along these bands. Furthermore, the annihilation of dislocation pairs and the increase of dislocation mean free path characterizing stage III of work-hardening are computationally predicted.

    DOI: 10.1299/jcst.2.197

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  • A Triple Scale Crystal Plasticity Modeling Based on Geometrically Necessary Crystal Defects and Homogenization Method and Simulation on Size Effect for Polycrystal

    E. Kurosawa, Y. Aoyagi, Y. Tadano, K. Shizawa

    Proceedings of APCOM'07-EPMESC XI   MS28-4-2:1 - 8   2007.12

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  • Multiscale Crystal Plasticity Simulation on Ultrafine-Graining Based on Evolution of Dislocation Structures and Accumulation of Geometrically Necessary Dislocations

    Yoshiteru Aoyagi, Masatoshi Sakuma, Nohiro Horibe, Kazuyuki Shizawa

    Proceedings of APCOM'07-EPMESC XI   MS28-4-1:1 - 9   2007.12

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  • Multiscale crystal plasticity modeling based on geometrically necessary crystal defects and simulation on fine-graining for polycrystal Reviewed

    Y. Aoyagi, K. Shizawa

    International Journal of Plasticity   23 ( 6 )   1022 - 1040   2007.6

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    DOI: 10.1016/j.ijplas.2006.10.009

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  • MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ULTRAFINE-GRAINING BASED ON DISLOCATION PATTERNING AND GEOMETRICALLY NECESSARY DISLOCATION

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '07: the 13th International Symposium on Plasticity and Its Current Applications   85 - 87   2007.6

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  • New Physical Interpretation of Incompatibility and Application to Dislocation Substructure Evolution Reviewed

    Yoshiteru Aoyagi and Tadashi Hasebe

    Key Engineering Materials   340-341   217 - 222   2007.1

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  • Multiscale Modeling and Simulation of Crystal Plasticity Based on Dislocation Patterning in Polycrystal Reviewed

    Naoshi Yamaki, Yoshiteru Aoyagi and Kazuyuki Shizawa

    Key Engineering Materials   340-341   205 - 210   2007.1

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  • 幾何学的に必要な転位密度および不適合度を考慮した転位-結晶塑性大変形シミュレーション(第2報,FCC単結晶への適用) Reviewed

    青柳吉輝, 志澤一之

    日本機械学会論文集A編   72 ( 723 )   1646 - 1653   2006.11

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    In the previous paper, the GN incompatibility is newly defined and a new annihilation term of a dislocation pair due to the dynamic recovery is introduced into an expression of dislocation density. Furthermore, a multiscale model of crystal plasticity is proposed by considering GN dislocation density and incompatibility. However, details of dislocation-crystal plasticity simulation are not given. In this paper, we explain a method of dislocation-crystal plasticity analysis. A finite element simulation is carried out for an f.c.c. single crystal under plane strain tension. It is numerically predicted that micro shear bands are formed at large strain, and sub-GNBs : small angle tilt boundaries are induced along these bands. Furthermore, the annihilation of dislocation pair and the increase of dislocation mean free path characterizing stage III of work-hardening are computationally predicted.

    DOI: 10.1299/kikaia.72.1646

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  • 幾何学的に必要な結晶欠陥を考慮した結晶粒超微細化に関する転位-結晶塑性シミュレーション Reviewed

    青柳吉輝, 志澤一之

    日本機械学会論文集A編   72 ( 720 )   1223 - 1230   2006.8

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    Ultrafine-grains (UFG) are induced by warm or cold-rolling process under severe plastic deformation. A transition of microscopic structure of a metal caused by behaviors of dislocations is closely connected with a macroscopic deformation. The information of dislocation field and deformation field is desirable to be coupled in the case of simulation of UFG formation. Profiles of formation process of UFG, e.g., aspects of subdivision and induced grain sizes, are expected to be numerically predicted. In this paper, a numerical method for estimating generation of subdivisions is proposed, and also the induced grain size is introduced into a strain rate sensivity model as an argument. A dislocation-crystal plasticity FE simulation based on the geometrically necessary crystal defects proposed in the previous paper and on the above model is carried out for large deformation of an FCC polycrystal under severe compression plane strain. Distributions of crystal defects and crystal orientations in a specimen are visualized and the influence of strain on separation of grains and one of strain rate sensitivity on refinement of grains under cold-rolling process are discussed in detail.

    DOI: 10.1299/kikaia.72.1223

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  • 幾何学的に必要な転位密度および不適合度を考慮した転位-結晶塑性大変形シミュレーション(第1報,GN結晶欠陥の定義およびマルチスケールモデリング) Reviewed

    青柳吉輝, 志澤一之

    日本機械学会論文集A編   72 ( 719 )   1009 - 1016   2006.7

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    Plastic deformation and work-hardening of a crystal are caused by dislocation motions and dislocation accumulations, respectively. Recently, studies of crystal plasticity with the dislocation information have actively been done by many researchers. In this paper, both densities of isolated dislocation and dislocation pair corresponding respectively to the conventional GN and SS dislocation densities are uniformly defined as geometrical quantities, i.e., GN dislocation density and GN incompatibility tensors by extending Kröner's dislocation density and incompatibility tensors so that they are suitable for a crystal plasticity framework. Furthermore, we newly introduce a term of dynamic recovery that occurs in stage III of work-hardening of a single crystal into the expression of dislocation density. A new model of dislocation-crystal plasticity coupling deformation field with dislocation field is developed by introducing these dislocation densities into a hardening modulus matrix of crystal plasticity through the Bailey-Hirsch relation.

    DOI: 10.1299/kikaia.72.1009

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  • MULTISCALE CRYSTAL PLASTICITY MODEL BASED ON GEOMETRICALLY NECESSARY CRYSTAL DEFECTS AND SIMULATION ON FINE-GRAINING AND SIZE EFFECT FOR POLYCRYSTAL

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '06: the 12th International Symposium on Plasticity and Its Current Applications   421 - 423   2006.7

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  • MULTISCALE SIMULATION ON DISLOCATION PATTERNING AND CRYSTAL PLASTICITY FOR HETEROGENEOUS POLYCRYSTAL

    Kazuyuki Shizawa, Naoshi Yamaki and Yoshiteru Aoyagi

    Proceedings of Plasticity '06: the 12th International Symposium on Plasticity and Its Current Applications   460 - 462   2006.7

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  • Modeling and Simulation of Crystal Plasticity Based on GN Crystal Defects for Ultrafine-Grained Metals Induced by Severe Plastic Deformation Reviewed

    Shingo Oishi, Yoshiteru Aoyagi and Kazuyuki Shizawa

    Materials Science Forum   503-504   215 - 220   2006.1

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  • Dislocation-Crystal Plasticity Simulation Based on Self-Organization for Repartition of Dislocation Cell Structures and Subgrain Reviewed

    Naoshi Yamaki, Yoshiteru Aoyagi and Kazuyuki Shizawa

    Materials Science Forum   503-504   989 - 994   2006.1

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  • Dislocation Patterning for Cell Structures and Subgrains in Polycrystal

    N. Yamaki, Y. Aoyagi and K. Shizawa

    Proceedings of International Conference on Computational and Experimental Engineering and Sciences   1476 - 1481   2005.12

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  • MULTISCALE MODELING AND SIMULATION OF CRYSTAL PLASTICITY BASED ON GN CRYSTAL DEFECTS FOR PRODUCTION OF ULTRAFINE-GRAINED METALS

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of Plasticity '05: the 11th International Symposium on Plasticity and Its Current Applications   412 - 414   2005.1

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  • MULTISCALE MODELING AND SIMULATION ON FORMATION OF ULTRAFINE-GRAINED METALS BASED ON SELF-ORGANIZATION OF CELL STRUCTURES AND SUBGRAINS

    Kazuyuki Shizawa and Yoshiteru Aoyagi

    Proceedings of Plasticity '05: the 11th International Symposium on Plasticity and Its Current Applications   457 - 459   2005.1

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  • MULTISCALE MODELING AND SIMULATION OF CRYSTAL PLASTICITYBASED ONGN CRYSTALDEFECTS CONSIDERING DYNAMIC RECOVERY OF DISLOCATION

    S. Oishi, Y. Aoyagi and K. Shizawa

    Computational Methods   557 - 562   2004.12

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  • A CRYSTAL PLASTICITY ANALYSIS FOR ACCUMULATIONS OF GEOMETRICALLY NECESSARY DISLOCATIONS AND DIPOLES AROUND SHEAR BAND Reviewed

    Yoshiteru AOYAGI and Kazuyuki SHIZAWA

    Mesoscopic Dynamics on Fracture Process and Materials Strength   87 - 96   2004.6

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  • A CRYSTAL PLASTICITY ANALYSIS ON ACCUMULATION OF GEOMETRICALLY NECESSARY DISLOCATION AND DIPOLE AROUND AN INCLUSION

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    Proceedings of 5th International Conference for Mesomechanics   124 - 131   2003.8

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  • 結晶塑性解析による超微細結晶粒アルミニウムの巨視的降伏挙動

    青柳吉輝

    ぷらすとす   6 ( 61 )   38 - 42   2023.1

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  • Crystal Plasticity Simulation on Fatigue Crack Propagation in Steel and Effect of Residual Stress by Cavitation Peening

    Yoshiteru Aoyagi, Osamu Takakuwa, Hitoshi Soyama

    Metal Finishing News   13 ( 4 )   58 - 60   2012.5

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Presentations

  • Characteristic Microstructure and Strengthening Mechanisms of Heterogeneous Nano-Structured Copper Alloys and Austenitic Stainless Steels Invited International conference

    Hiromi Miura, Yoshiteru Aoyagi, Chihiro Watanabe

    TMS 2026 Annual Meeting & Exhibition  ( San Diego, USA )   2026.3 

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  • Microstructure-Sensitive Modeling Using Fatigue Indicator Parameters for Advanced Heterogeneous Materials International conference

    Yoshiteru Aoyagi

    TMS 2026 Annual Meeting & Exhibition  ( San Diego, USA )   2026.3 

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  • MULTISCALE PLASTICITY SIMULATION OF POLYLACTIC ACID SPHERULITES USING THREE-DIMENSIONAL LAMINATE THEORY INCORPORATING CRYSTALLINITY AND MICROSTRUCTURE Invited International conference

    Nomun Gerel-Erdene, Yoshiteru Aoyagi

    The 29th International Conferences on Plasticity, Damage, and Fracture  ( Geelong, Australia )   2026.1 

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  • CRYSTAL PLASTICITY – PHASE FIELD DAMAGE SIMULATION: INVESTIGATING DUCTILE FRACTURE BEHAVIOR INDUCED BY CRYSTALLOGRAPHIC ORIENTATION AND PRECIPITATED PARTICLE Invited International conference

    Haruki Ohashi, Hojun Lim, Yoshiteru Aoyagi, Aashique A. Rezwan

    The 29th International Conferences on Plasticity, Damage, and Fracture  ( Geelong, Australia )   2026.1 

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  • MULTISCALE MODELING OF NONLINEAR VISCOELASTICVISCOPLASTIC BEHAVIOR IN GLASSY POLYMERS BASED ON INTRAMOLECULAR CHAIN ROTATION Invited International conference

    Yoshiteru Aoyagi

    The 29th International Conferences on Plasticity, Damage, and Fracture  ( Geelong, Australia )   2026.1 

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  • 溝ロール圧延における溝形状がひずみ分布に与える影響に関するマルチスケールシミュレーション

    青柳吉輝, 大橋春希, 渡邊千尋, 三浦博巳

    日本銅学会第65回講演大会  ( 姫路 )   2025.11 

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  • Modeling on Gradient Spherulite Growth Formation Controlled by Temperature Gradient

    Gerel-Erdene Nomun,Wang Boqi ,Aoyagi Yoshiteru

    第11回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2025.10 

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  • 結晶方位・析出粒子誘起の延性破壊挙動に関する結晶 塑性-フェーズフィールド損傷解析

    大橋春希, Rezwan Aashique, Lim Hojun, 青柳吉輝

    第11回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2025.10 

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  • Strengthening Mechanisms of Heterogeneous Nano-Structured Stainless Steels and Copper Alloys International conference

    Miura Hiromi, Kobayashi Masakazu, Aoyagi Yoshiteru, Watanabe Chihiro

    International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS  ( Tours, France )   2025.7 

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  • Multiscale Finite Element Simulation on Effect of Groove Shape on Strain Distribution in Caliver Rolling Invited International conference

    Aoyagi Yoshiteru, Ohashi Haruki, Watanabe Chihiro, Miura Hiromi

    International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS  ( Tours, France )   2025.7 

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  • Crystal Plasticity Simulation Based on Predicted Dislocation Density Distribution for Mechanical Anisotropy in Heavily Cold-Rolled Metals International conference

    Nomun Gerel-Erdene, Kenshin Hayashi, Haruki Ohashi, Chihiro Watanabe, Hiromi Miura, and Yoshiteru Aoyagi

    The 20th International Conference on Strength of Materials  ( Kyoto, Japan )   2025.6 

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  • Crystal Plasticity Modeling of Twinning Induced Plasticity Considering Mechanical Anisotropy on Lamellar Twin International conference

    Haruki Ohashi and Yoshiteru Aoyagi

    The 20th International Conference on Strength of Materials  ( Kyoto, Japan )   2025.6 

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  • Heterogeneous Nano-Structure and Mechanical Properties of Groove-Rolled Cu-Zn-Si Alloy Bars International conference

    Hiromi Miura, Yojiro Oba, Yoshiteru Aoyagi, and Chihiro Watanabe

    The 20th International Conference on Strength of Materials  ( Kyoto, Japan )   2025.6 

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  • ナノインデンテーション試験に基づく微視的力学特性の機械学習による巨視的応力ひずみ応答の予測

    王博琦, Gerel-Erdene Nomun, 青柳吉輝

    日本材料学会第74期学術講演会  ( 郡山 )   2025.5 

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  • 温度勾配による不均一球晶構造制御に基づくポリ乳酸の力学特性向上

    土屋快晟(東北大院),大橋春希,青柳吉輝

    日本材料学会第74期学術講演会  ( 郡山 )   2025.5 

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  • Polymer Viscoelastoplasticity Simulation Considering Spherulite Structure Based on Three-Dimensional Laminate Theory

    Nomun GEREL-ERDENE and Yoshiteru AOYAGI

    日本材料学会第74期学術講演会  ( 郡山 )   2025.5 

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  • Cu-Zn合金のEBSD観察に基づく結晶方位および転位密度分布を考慮した結晶塑性FEMシミュレーション

    青柳吉輝, 林剣心, Gerel-Erdene, N., 渡邊千尋, 三浦博巳

    日本銅学会第64回講演大会  ( 宇都宮 )   2024.10 

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  • Crystal Plasticity Finite Element Simulation Considering Geometrically Necessary Dislocations Estimated from EBSD Observation

    Nomun GEREL-ERDENE, Yoshiteru AOYAGI

    日本機械学会第37回計算力学講演会  ( 仙台 )   2024.10 

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  • 部分転位に基づく双晶変形メカニズムを考慮した双晶誘起塑性シミュレーション

    大橋春希, 青柳吉輝

    日本機械学会第37回計算力学講演会  ( 仙台 )   2024.10 

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  • 強圧延Cu-Zn合金の集合組織および転位分布を考慮した結晶塑性シミュレーション

    林剣心,渡邊千尋,三浦博己,青柳吉輝

    日本機械学会第37回計算力学講演会  ( 仙台 )   2024.10 

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  • Multiscale Visco-Elasto-Plasticity Modeling Considering Spherulite Structure of Crystalline Polymers International conference

    Y. Aoyagi

    International Discussion Meeting on Polymer Crystallization 2024  ( Yonezawa, Japan )   2024.9 

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  • Prediction of mechanical properties of metals using machine learning based on distribution of nanoindentation test results International conference

    Yoshiteru Aoyagi and Masaki Nishimura

    20th International Conference on Textures of Materials  ( Metz, France )   2024.6 

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  • ポリ乳酸の力学特性の向上させる球晶-非晶混相組織制御方法

    青柳吉輝, 牛込良海

    日本材料学会第73期学術講演会  ( 長崎 )   2024.5 

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  • Multiscale modeling of nonlinear viscoelasticity-viscoplasticity of amorphous polymers under various loading conditions Invited International conference

    Yoshiteru Aoyagi

    International Symposium on Plasticity, Damage, and Fracture 2024  ( Panama City, Panama )   2024.1 

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  • Modeling of Crystal Plasticity Predicting Microstructural Changes Caused by Twinning-Induced Plasticity International conference

    Haruki Ohashi, Yoshiteru Aoyagi

    The 11th Pacific Rim International Conference on Advanced Materials and Processing  ( Jeju, Republic of Korea )   2023.11 

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  • Prediction of Macroscopic Mechanical Properties of Heterogeneous Structured Metals Based on Neural Network International conference

    Masaki Nishimura, Yoshiteru Aoyagi

    The 11th Pacific Rim International Conference on Advanced Materials and Processing  ( Jeju, Republic of Korea )   2023.11 

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  • Crystal Plasticity Simulation Considering Microstructures of Metals on Mechanical Anisotropy Induced by Rolling International conference

    Nom Gerel-Erdene, Yoshiteru Aoyagi

    The 11th Pacific Rim International Conference on Advances Materials and Processing  ( Jeju, Republic of Korea )   2023.11 

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  • ヘテロナノ組織を考慮した結晶塑性シミュレーション手法とその応用 Invited

    青柳吉輝

    日本銅学会第63回講演大会  ( 名古屋 )   2023.11 

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  • ヘテロナノ組織を有したSUS316LNステンレス鋼の粒界偏析に関する結晶塑性解析

    林剣心, 渡辺千尋, 三浦博己, 青柳吉輝

    第9回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2023.10 

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  • 双晶変形における格子変形および双晶境界の影響を考慮した結晶塑性シミュレーション

    大橋春希, 青柳吉輝

    第9回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2023.10 

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  • Microstructure and strengthening mechanisms of heterogeneous-nanostructured 316LN stainless steel prepared by heavy cold rolling Invited International conference

    Hiromi Miura, Yojiro Oba, Yoshiteru Aoyagi, Masakazu Kobayashi, Chihiro Watanabe

    International Conference on Processing & Manufacturing of Advanced Materials  ( Vienna, Austria )   2023.7 

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  • Crystal Plasticity FE Simulation Reproducing Mechanical Anisotropy Based on Microstructure of Rolled Metals Invited International conference

    Yoshiteru Aoyagi

    International Conference on Processing & Manufacturing of Advanced Materials  ( Vienna, Austria )   2023.7 

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  • 圧延加工に起因する結晶方位配向および転位組織を考慮した結晶塑性シミュレーション

    大橋春希, 柳沼雄介, 青柳吉輝

    日本材料学会第72期学術講演会  ( つくば )   2023.5 

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  • Investigation of Effect of Microstructure on Mechanical Properties of Poly (L-lactic acid) by Molecular Dynamics Simulation

    呉高天, 青柳吉輝

    日本機械学会東北支部第58期総会・講演会  ( 仙台 )   2023.3 

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  • 双晶変形に起因する不均一変形の緩和を考慮した結晶塑性モデリング

    大橋春希, 青柳吉輝

    日本機械学会東北支部第58期総会・講演会  ( 仙台 )   2023.3 

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  • Crystal plasticity modeling on martensitic transformation induced plasticity based on lattice deformation Invited International conference

    Yoshiteru Aoyagi

    International Symposium on Plasticity, Damage, and Fracture 2023  ( Punta Cana, Dominican Republic )   2023.1 

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  • Microstructure and mechanical properties of heterogeneous-nanostructured austenitic stainless steel fabricated by heavy cold rolling Invited International conference

    Hiromi Miura, Chihiro Watanabe, Yoshiteru Aoyagi, Yojiro Oba, Masakazu Kobayashi

    International Symposium on Plasticity, Damage, and Fracture 2023  ( Punta Cana, Dominican Republic )   2023.1 

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  • 双晶の体積分率に依存する流れ応力を考慮した双晶誘起塑性モデルに基づく結晶塑性解析

    大橋春希, 青柳吉輝

    日本機械学会第35回計算力学講演会  ( オンライン )   2022.11 

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  • ポリ乳酸の球晶構造を模擬した三次元高分子塑性シミュレーション

    牛込良海, 青柳吉輝

    第8回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2022.10 

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  • Investigation of Effect of Crystallinity on Local Mechanical Properties of Polylactic Acid

    Hong Liqin, Aoyagi Yoshiteru

    第8回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2022.10 

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  • 押込み試験を用いた鋼材構成組織単体における応力ひずみ関係推定手法の提案

    坂巻巧, 西本圭佑, 貝ヶ石康平, 黒澤瑛介, 西村将輝, 青柳吉輝

    第8回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2022.10 

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  • 準安定オーステナイトの初期結晶組織が変態誘起塑性の微視的力学特性に与える影響

    西村将輝, 青柳吉輝

    第8回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2022.10 

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  • Spherulite Microstructure Formation Simulation Based on Effect of Molding Conditions on Polylactic Acid International conference

    Hong Liqin, Koichi Tatsuno and Yoshiteru Aoyagi

    15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics  ( Virtual, Japan )   2022.7 

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  • Reproduction Method of Mechanical Anisotropy Induced by Cold Rolling in Crystal Plasticity FE Simulation International conference

    Yusuke Yaginuma and Yoshiteru Aoyagi

    15th World Congress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics  ( Virtual, Japan )   2022.7 

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  • ナノインデンテーション法による準安定オーステナイトの変態誘起塑性に関する力学的特性評価

    西村将輝, 青柳吉輝

    日本材料学会第71期学術講演会  ( 大阪(ハイブリッド) )   2022.5 

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  • Evaluation of Local Mechanical Properties of Polylactic Acid Spherulite Microstructures by Nanoindentation Test

    Hong Liqin, Aoyagi Yoshiteru

    日本材料学会第71期学術講演会  ( 大阪(ハイブリッド) )   2022.5 

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  • 結晶性ポリマの球晶組織が力学特性に与える影響および非線形粘弾塑性シミュレーション

    牛込良海, Narita Camboulives Louis, 青柳吉輝

    日本材料学会第71期学術講演会  ( 大阪(ハイブリッド) )   2022.5 

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  • ハイエントロピー合金の双晶誘起塑性に関する結晶塑性論的検討

    森茂樹, 青柳吉輝

    日本機械学会第29回 機械材料・材料加工技術講演会(M&P2021)  ( オンライン )   2021.11 

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  • ポリ乳酸の球晶組織形成に成形温度が与える影響に関する研究

    龍野孝一, 青柳吉輝

    日本機械学会第29回 機械材料・材料加工技術講演会(M&P2021)  ( オンライン )   2021.11 

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  • 結晶塑性FEM解析における圧延集合組織のモデリング

    柳沼雄介, 青柳吉輝

    第7回材料WEEK 材料シンポジウム ワークショップ  ( オンライン )   2021.10 

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  • Plasticity Modeling of Glassy Polymer Based on Microscopic Behavior of Molecular Chains

    Narita Camboulives Louis, Aoyagi Yoshiteru

    第7回材料WEEK 材料シンポジウム ワークショップ  ( オンライン )   2021.10 

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  • Simulated Microstructure Effects on Macroscopic Mechanical Properties Based on Multiscale Crystal Plasticity International conference

    Yoshiteru Aoyagi, Ryota Kobayashi, David L. McDowell

    The 13th International Conference on the Technology of Plasticity  ( Vertual Event, USA )   2021.7 

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  • Crystal plasticity simulation considering microstructures of high entropy alloy on mechanical properties Invited International conference

    Yoshiteru Aoyagi; Shigeki Mori

    International Conference on Processing & Manufacturing of Advanced Materials  ( Virtual Conference, Austria )   2021.6 

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  • 純チタン中のヘテロナノ組織に関する結晶塑性解析手法の構築と変形挙動の評価

    柳沼雄介, 下川智嗣, 渡邊千尋, 三浦博己, 青柳吉輝

    日本材料学会第70期学術講演会  ( オンライン )   2021.5 

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  • ハイエントロピー合金の圧延加工組織に関する結晶塑性FEM解析 Invited

    青柳吉輝, 小林亮太, 都留智仁, 弓削是貴, 下川智嗣, 久保百司, 尾方成信

    日本金属学会2021年春期講演大会  ( オンライン )   2021.3 

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  • BCCハイエントロピー合金における短距離秩序と転位構造の第一原理計算

    都留智仁, ロブゼンコ イバン, 弓削是貴, 青柳吉輝, 下川智嗣, 久保百司, 尾方成信

    日本金属学会2021年春期講演大会  ( オンライン )   2021.3 

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  • Deformation behavior of a heterogeneous-nano structured austenitic steel at cryogenic temperature and its deformation mechanism

    姜華, 渡邊千尋, 古賀紀光, 青柳吉輝, 小林正和, 三浦博己

    日本金属学会2021年春期講演大会  ( オンライン )   2021.3 

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  • Prediction of mechanical properties based on the crystal plasticity simulation considering microstructure information of high entropy alloys International conference

    R. Kobayashi and Y. Aoyagi

    The 19th International Conference on Textures of Materials (2021)  ( Virtual Conference, Japan )   2021.3 

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  • 微細組織情報に基づいた力学特性予測に関する結晶塑性シミュレーション

    青柳吉輝

    日本材料学会高温強度部門委員会講演会  ( オンライン )   2021.1 

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  • ハイエントロピー合金の積層欠陥エネルギーに関する結晶塑性論的検討

    森茂樹, 青柳吉輝

    第6回材料WEEK 材料シンポジウム ワークショップ  ( 京都/Web )   2020.10 

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  • Polymer Plasticity Modeling Based on Microscopic Behavior of Molecular Chains on Amorphous Phase of Polypropylene

    Narita Camboulives Louis, Aoyagi Yoshiteru

    第6回材料WEEK 材料シンポジウム ワークショップ  ( 京都/Web )   2020.10 

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  • ポリ乳酸における球晶核形成および球晶成長の温度依存性に関する研究

    龍野孝一,青柳吉輝

    第6回材料WEEK 材料シンポジウム ワークショップ  ( 京都/Web )   2020.10 

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  • 金属微視的組織情報に基づく巨視的力学特性予測に関する結晶塑性シミュレーション Invited

    青柳吉輝

    日本機械学会東北支部第56期秋季講演会  ( Web開催 )   2020.9 

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  • ヘテロナノ組織二相ステンレス鋼の応力分配挙動

    鈴木慎也, 姜華, 渡邊千尋, 古賀紀光, 宮嶋陽司, 青柳吉輝, 小林正和, 三浦博己

    日本金属学会2020年秋期(第167回)大会  ( オンライン )   2020.9 

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  • 計算材料科学によるハイエントロピー合金の力学特性の解明 Invited

    尾方成信, 都留智仁, 下川智嗣, 久保百司, 青柳吉輝, 弓削是貴

    日本金属学会2020年秋期(第167回)大会  ( オンライン )   2020.9 

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  • ヘテロナノ組織オーステナイト鋼の変形機構の検討

    姜華, 渡邊千尋, 宮嶋陽司, 古賀紀光, 青柳吉輝, 小林正和, 三浦博己

    日本金属学会2020年秋期(第167回)大会  ( オンライン )   2020.9 

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  • マルテンサイト変態誘起塑性モデリング Invited

    青柳吉輝

    日本金属学会2020年秋期(第167回)大会  ( オンライン )   2020.9 

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  • MULTISCALE CRYSTAL PLASTICITY MODELING ON MARTENSITIC TRANSFORMATION BASED ON MIXTURE LAW Invited International conference

    Yoshiteru Aoyagi and David L. McDowell

    International Symposium on Plasticity, Damage, and Fracture 2020  ( Rivera Maya, Mexico )   2020.1 

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  • 熱可塑性高分子材料のマルチスケールメカニクス Invited

    青柳吉輝

    2019年度高分子シミュレーション技術セミナー討論会  ( 熱海 )   2019.11 

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  • 分子動力学シミュレーションによるポリプロピレン非晶相の多軸応力変形挙動の検討

    佐藤凌介, 青柳吉輝

    第5回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2019.10 

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  • 炭素繊維強化ポリプロピレンの力学特性に及ぼす母材の微細組織の影響

    金谷海, 青柳吉輝

    第5回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2019.10 

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  • オーステナイト鋼におけるヘテロナノ組織形態の影響に関するFEM 解析

    塚田悠介, 渡邊千尋, 小林正和, 戸高義一, 三浦博己, 青柳吉輝

    第5回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2019.10 

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  • 微細粒アルミニウムの微視組織情報に基づく巨視的降伏挙動に関する検討

    小林亮太, 相樂篤志, 青柳吉輝

    日本機械学会第32回計算力学講演会  ( 川越 )   2019.9 

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  • Multiscale Simulation Based on Macroscopic Deformation Model Predicted by Microstructure Information of Ultrafine-Grained Metals Invited International conference

    Yoshiteru Aoyagi, Atsushi Sagara, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka, Hiromi Miura

    The 10th Pacific Rim International Conference on Advanced Materials and Processing  ( Xi'an, China )   2019.8 

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  • Modeling of Twinning-Induced Plasticity of High Entropy Alloy Based on Crystal Plasticity International conference

    Takuya Tsukuda, Yoshiteru Aoyagi

    The 10th Pacific Rim International Conference on Advanced Materials and Processing  ( Xi'an, China )   2019.8 

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  • Multiscale Crystal Plasticity Simulation Based on Fatigue Indicator Parameters on Ultrafine-grained Metals International conference

    Yoshiteru Aoyagi, David McDowell

    5th World Congress on Integrated Computational Materials Engineering  ( Indianapolis, USA )   2019.7 

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  • 画像処理モデリングに基づくDP 鋼マルテンサイト組織形状に関するFEM 解析

    塚田悠介, 椿翔太, 黒澤瑛介, 青柳吉輝

    日本材料学会第68期学術講演会  ( 室蘭 )   2019.5 

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  • 2D-C/Cコンポジットの引張特性に及ぼすひずみ速度の影響

    金谷海, 丹野英幸, 青柳吉輝

    日本材料学会第68期学術講演会  ( 室蘭 )   2019.5 

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  • ヘテロナノ組織を有するオーステナイト鋼の変形中の格子欠陥密度変化

    姜華, 小林秀平, 渡邊千尋, 青柳吉輝, 小林正和, 三浦博己

    日本金属学会2019年春期講演大会  ( 東京 )   2019.3 

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  • 混合則を用いた双晶誘起塑性モデリングおよび結晶塑性シミュレーション

    附田拓也, 青柳吉輝

    日本金属学会2019年春期講演大会  ( 東京 )   2019.3 

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  • MULTISCALE CRYSTAL PLASTICITY MODELING ON TWINNING OF HETERO-NANOSTRUCTURED STAINLESS STEELS Invited International conference

    Yoshiteru Aoyagi, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    International Symposium on Plasticity, Damage, and Fracture 2019  ( Panama City, Panama )   2019.1 

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  • Monte Carlo simulation predicting generation and growth of spherulites in thermoplastic polymer International conference

    Ryota Osawa and Yoshiteru Aoyagi

    The 9th International Conference on Multiscale Materials Modeling  ( Osaka, Japan )   2018.10 

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  • Development of a multiscale simulation system based on microstructure of fine-grained aluminum International conference

    Atsuchi Sagara and Yoshiteru Aoyagi

    The 9th International Conference on Multiscale Materials Modeling  ( Osaka, Japan )   2018.10 

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  • 結晶塑性論に基づくマルテンサイト変態誘起塑性モデルの構築

    附田拓也, 河原木雄介, 岡村一男, 青柳吉輝

    第4回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2018.10 

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  • ポリプロピレンの二軸引張・圧縮試験による巨視的降伏曲面の評価

    吉原鉄朗, 青柳吉輝

    第4回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2018.10 

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  • Crystal Plasticity Simulation Considering Microstructures of Austenitic Stainless Steel on Macroscopic Yield Function Invited International conference

    Yoshiteru Aoyagi, Atsushi Sagara, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    International Conference on Processing & Manufacturing of Advanced Materials  ( Paris, France )   2018.7 

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  • 熱圧縮ポリプロピレンの2軸引張り試験による降伏曲面の力学異方性評価

    附田拓也, 青柳吉輝

    日本材料学会第67期学術講演会  ( 高知 )   2018.5 

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  • ポリプロピレンの繰返し引張・繰返し圧縮非対称性に関する弾粘塑性モデルの検討

    吉原鉄朗, 青柳吉輝

    日本材料学会第67期学術講演会  ( 高知 )   2018.5 

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  • 金属微細組織情報に基づく結晶塑性シミュレーションによる巨視的変形挙動の予測 Invited

    青柳吉輝

    日本金属学会2018年春期講演大会  ( 千葉 )   2018.3 

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  • MULTISCALE PLASTICITY MODELING AND SIMULATION ON CRYSTALLINE POLYMER BASED ON MICROSCOPIC DEFORMATION BEHAVIOR OF MOLECULAR CHAINS Invited International conference

    Yoshiteru Aoyagi and Yota Tsuge

    International Symposium on Plasticity, Damage, and Fracture 2019  ( San Juan, USA )   2018.1 

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  • 熱可塑性高分子材料における結晶化メカニズムの評価と数値解析的予測

    大澤凌太, 青柳吉輝

    第3回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2017.10 

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  • 微細粒Alの微細組織に基づく巨視的降伏関数に関する結晶塑性シミュレーション

    相樂篤志, 青柳吉輝

    第3回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2017.10 

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  • Multiscale Crystal Plasticity Modeling Considering Nucleation of Dislocations Based on Thermal Activation Process on Ultrafine-grained Aluminum International conference

    Y Aoyagi

    The 7th International Conference on Nanomaterials by Severe Plastic Deformation  ( Sydney, Australia )   2017.7 

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  • ポリ乳酸のひずみ速度依存性に及ぼす球晶組織の影響に関する数値解析的評価

    大澤凌太, 青柳吉輝

    日本材料学会第66期学術講演会  ( 名古屋 )   2017.5 

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  • SUS316L微細粒鋼の微視組織を考慮した結晶塑性解析による巨視的降伏関数の評価

    相樂篤志, 青柳吉輝

    日本材料学会第66期学術講演会  ( 名古屋 )   2017.5 

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  • 強圧延を施したステンレス鋼中のヘテロナノ組織の局所硬さ

    渡邊千尋, 渡辺仁, 青柳吉輝, 戸高義一, 小林正和, 三浦博己

    日本鉄鋼協会第173回春季大会  ( 東京 )   2017.3 

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  • 強圧延二相ステンレス鋼中のヘテロナノ組織と機械的特性

    三浦博己, 小山晃司, 小林正和, 戸高義一, 渡邊千尋, 青柳吉輝

    日本鉄鋼協会第173回春季大会  ( 東京 )   2017.3 

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  • 圧延プロセスがステンレス鋼のヘテロナノ組織に与える影響に関する結晶塑性解析

    青柳吉輝, 渡邊千尋, 戸高義一, 小林正和, 三浦博己

    日本金属学会2017年春期講演大会  ( 東京 )   2017.3 

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  • HETEROGENEOUS NANO-STRUCTURES DEVELOPED IN STAINLESS STEELS BY HEAVY COLD ROLLING AND THE MECHANICAL PROPERTIES Invited International conference

    H. Miura, M. Kobayashi, Y. Todaka, C. Wtanabe, Y. Aoyagi, N. Sugiura and N. Yoshinaga

    The 23th International Symposium on Plasticity, Damage, and Fracture  ( Puerto Vallarta, Mexico )   2017.1 

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  • MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ROLLING PROCESS FOR PRODUCTION OF HETERO-NANOSTRUCTURED STAINLESS STEELS Invited International conference

    Yoshiteru Aoyagi, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    The 23th International Symposium on Plasticity, Damage, and Fracture  ( Puerto Vallarta, Mexico )   2017.1 

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  • Macroscopic Yield Function Predicted by Crystal Plasticity Simulation on Ultrafine-grained Aluminum International conference

    Yoshiteru Aoyagi

    13th Asia-Pacific Symposium on Engineering Plasticity and Its Applications  ( Hiroshima, Japan )   2016.12 

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  • トランスクリスタル層が炭素繊維強化ポリプロピレンの降伏応力に与える影響

    片浦瑞希, 青柳吉輝

    第2回材料WEEK 材料シンポジウム ワークショップ  ( 京都 )   2016.10 

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  • Computational Modeling on Inelastic Deformation of Thermosetting Polymers Based on Molecular Chain Behavior Invited International conference

    Makoto UCHIDA, Yoshiteru AOYAGI, Kazuyuki SHIZAWA

    The 2nd Symposium on SIP Innovative Measurement and Analysis for Structural Materials  ( Tsukuba, Japan )   2016.9 

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  • 分子動力学シミュレーションによる自由体積および分子鎖配向がポリプロピレンの巨視的力学特性に与える影響の評価

    柘植洋太, 青柳吉輝

    日本機械学会第29回計算力学講演会  ( 名古屋 )   2016.9 

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  • Molecular Dynamics Simulation on Microscopic Plastic Deformation Behavior of Crystalline Phase of Polypropylene International conference

    Yota TSUGE, Yoshiteru AOYAGI

    Asia-Pacific Conference on Fracture and Strength 2016  ( Toyama, Japan )   2016.9 

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  • Multiscale Simulation on Effect of Hetero-nanostructure on Mechanical Properties of Severe Rolled Stainless Steel Invited International conference

    Yoshiteru Aoyagi, Tomoki Uoji, Chihiro Watanabe, Masakazu Kobayashi, Yoshikazu Todaka and Hiromi Miura

    The 9th Pacific Rim International Congress on Advanced Materials and Processing  ( Kyoto, Japan )   2016.8 

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  • トランスクリスタル層の組織制御とポリプロピレンの機械的特性に与える影響

    片浦瑞希, 笹山俊貴, 井上良徳, 青柳吉輝

    日本材料学会第65期学術講演会  ( 富山 )   2016.5 

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  • 巨大ひずみ加工したオーステナイト系ステンレス鋼316LNの組織と力学特性

    戸髙義一, 足立望, 上島大輔, 山下皓太, 三浦博己, 小林正和, 渡邊千尋, 青柳吉輝

    日本鉄鋼協会第171回春季大会  ( 東京 )   2016.3 

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  • 巨大ひずみ加工したオーステナイト系ステンレス鋼316LNの力学特性に及ぼすMnの影響

    山下皓太, 戸高義一, 足立望, 三浦博己, 小林正和, 渡邊千尋, 青柳吉輝

    日本鉄鋼協会第171回春季大会  ( 東京 )   2016.3 

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  • 強圧延二相ステンレス鋼の強度と組織に及ぼす時効処理とフェライト量の影響

    小山晃司, 小林正和, 青葉知弥, 戸高義一, 三浦博己, 渡邊千尋, 青柳吉輝

    日本鉄鋼協会第171回春季大会  ( 東京 )   2016.3 

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  • 強圧延SUS316LNの組織と強度に及ぼす添加Mn量の影響

    辻知輝, 小林正和, 青葉知弥, 戸高義一, 三浦博己, 青柳吉輝, 渡邊千尋

    日本鉄鋼協会第171回春季大会  ( 東京 )   2016.3 

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  • SUS316LN鋼における冷間圧延中のヘテロナノ組織の形成過程

    渡邊千尋, 青柳吉輝, 戸高義一, 小林正和, 三浦博己

    日本金属学会2016年春期講演大会  ( 東京 )   2016.3 

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  • 強圧延によりヘテロナノ構造を有した二相ステンレス鋼のα分率の疲労強度への影響

    山﨑恭和, 小林正和, 三浦博己, 戸高義一, 渡邊千尋, 青柳吉輝

    日本金属学会2016年春期講演大会  ( 東京 )   2016.3 

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  • MULTISCALE CRYSTAL PLASTICITY SIMULATION ON YIELD SURFACE OF ULTRAFINE-GRAINED METAL Invited International conference

    Yoshiteru Aoyagi

    The 22th International Symposium on Plasticity and Its Current Applications  ( Kailua Kona, USA )   2016.1 

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  • 分子動力学法によるポリプロピレンの結晶相における分子鎖すべりシミュレーション

    柘植洋太, 青柳吉輝

    日本機械学会 M&M2015材料力学カンファレンス  ( 横浜 )   2015.11 

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  • 遺伝的アルゴリズムおよび高次降伏関数を用いたUFGMの巨視的降伏挙動に関する検討

    青柳吉輝

    第1回材料WEEK 材料シンポジウム・若手学生研究発表会  ( 京都 )   2015.10 

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  • 高次組織に依存したポリプロピレンの力学特性に関する高分子塑性解析

    井上敦, 笹山俊貴, 井上良徳, 青柳吉輝

    日本機械学会第28回計算力学講演会  ( 横浜 )   2015.10 

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  • ステンレス鋼における強圧延誘起双晶ヘテロナノ組織に関する結晶塑性解析

    魚路知生, 青柳吉輝

    日本機械学会第28回計算力学講演会  ( 横浜 )   2015.10 

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  • Multiscale Modeling and Crystal Plasticyt Simulation on Anisotropic Yielding Behavior of Bulk Nanostructured Metals Invited International conference

    Yoshiteru AOYAGI, Tomohito TSURU and Tomotsugu SHIMOKAWA

    The 2nd International Workshop on Bulk Nanostructured Metals  ( Kyoto, Japan )   2015.8 

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  • Large-Scale Atomistic Simulations of Anisotropic Plastic Deformation in Bulk Nanostructured Metals Invited International conference

    Tomohito TSURU, Yoshiteru AOYAGI, Yoshiyuki KAJI and Tomotsugu SHIMOKAWA

    The 2nd International Workshop on Bulk Nanostructured Metals  ( Kyoto, Japan )   2015.8 

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  • Influence of Grain Boundary Dislocation Sources on Mechanical Properties of Nanostructured Metals: A Molecular Dynamics Study Invited International conference

    Tomotsugu SHIMOKAWA, Tomohito TSURU, Yoshiteru AOYAGI, Masaki TANAKA and Kenji HIGASHIDA

    The 2nd International Workshop on Bulk Nanostructured Metals  ( Kyoto, Japan )   2015.8 

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  • 超微細結晶粒アルミニウムの巨視的降伏挙動に関する結晶塑性シミュレーション

    青柳吉輝

    日本材料学会第64期学術講演会  ( 米沢 )   2015.5 

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  • Atomistic simulations of yield process and plastic deformation in bulk nanostructured metals International conference

    Tomohito Tsuru, Yoshiteru Aoyagi, Yoshiyuki Kaji, Tomotsugu Shimokawa

    The 23rd International Conference on Nuclear Engineering  ( Chiba, Japan )   2015.5 

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  • Multiscale crystal plasticity simulation on anisotropic yielding behavior of ultrafine-grained metal International conference

    YOSHITERU AOYAGI

    12th International Conference on the Mechanical Behavior of Materials  ( Karlsruhe, Germany )   2015.5 

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  • Tension/compression anisotropy in yeild stress and Bauschinger effect in ultrafine-grained metals International conference

    TOMOHITO TSURU, YOSHITERU AOYAGI, YOSHIYUKI KAJI, TOMOTSUGU SHIMOKAWA

    12th International Conference on the Mechanical Behavior of Materials  ( Karlsruhe, Germany )   2015.5 

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  • ポリプロピレンの結晶相および非晶相における塑性変形挙動に関する分子動力学解析

    柘植洋太, 青柳吉輝

    日本機械学会東北学生会第45回学生員卒業研究発表講演会  ( 八戸 )   2015.3 

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  • MULTISCALE PLASTICITY SIMULATION ON CRYSTALLINE POLYMER CONSIDERING SPHERULITE STRUCTURE OF POLYPROPYLENE Invited International conference

    Yoshiteru Aoyagi, Atsushi Inoue, Toshiki Sasayama and Yoshinori Inoue

    The 21th International Symposium on Plasticity and Its Current Applications  ( Montego Bay, Jamaica )   2015.1 

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  • 単軸引張りにおけるポリプロピレンの応力ひずみ応答に関する高分子塑性シミュレーション

    井上敦, 笹山俊貴, 井上良徳, 青柳吉輝

    日本機械学会第27回計算力学講演会  ( 盛岡 )   2014.11 

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  • 超微細粒金属材料の破壊に及ぼす転位挙動の影響

    魚路知生, 青柳吉輝

    日本機械学会第27回計算力学講演会  ( 盛岡 )   2014.11 

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  • ポリプロピレンの非線形弾性応答に及ぼす微細組織の影響

    井上敦, 笹山俊貴, 井上良徳, 青柳吉輝

    日本機械学会東北支部第50期秋季講演会  ( 多賀城 )   2014.9 

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  • 球晶構造に依存したポリプロピレンの応力ひずみ応答に関する高分子塑性シミュレーション

    青柳吉輝, 井上敦, 笹山俊貴, 井上良徳, 岡部朋永

    日本材料学会第63期学術講演会  ( 福岡 )   2014.5 

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  • 超微細粒金属の力学特性に及ぼす引張予ひずみの影響

    魚路知生, 青柳吉輝, 祖山均

    日本機械学会東北支部第49期総会・講演会  ( 仙台 )   2014.3 

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  • CRYSTAL PLASTICITY SIMULATION CONSIDERING THE EFFECT OF THE DISLOCATION SOURCE ON YIELD BEHAVIOR Invited International conference

    Yoshiteru Aoyagi, Tomohito Tsuru and Tomotsugu Shimokawa

    The 20th International Symposium on Plasticity and Its Current Applications  ( Freeport, Bahamas )   2014.1 

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  • ATOMISTIC SIMULATIONS OF SIZE-DEPENDENT YIELD MECHANISM OF ULTRAFINE-GRAINED METALS Invited International conference

    T. Tsuru, Y. Aoyagi, Y. Kaji and T. Shimokawa

    The 20th International Symposium on Plasticity and Its Current Applications  ( Freeport, Bahamas )   2014.1 

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  • 転位源挙動を考慮した超微細結晶粒材の降伏挙動に関する結晶塑性シミュレーション Invited

    青柳吉輝, 都留智仁, 下川智嗣

    第57回日本学術会議材料工学連合講演会  ( 京都 )   2013.11 

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  • 階層的モデリングに基づく結晶性ポリマの材料特性評価

    青柳吉輝, 笹山俊貴, 井上良徳, 山本智, 岡部朋永

    日本機械学会第26回計算力学講演会  ( 佐賀 )   2013.11 

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  • 疲労亀裂の発生および進展挙動に及ぼす転位挙動と結晶方位の影響

    今井祐紀, 青柳吉輝, 祖山均

    日本機械学会第26回計算力学講演会  ( 佐賀 )   2013.11 

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  • インデンテーション試験および結晶塑性解析を用いた粒界における力学特性の評価

    佐久間翔, 青柳吉輝, 祖山均

    日本機械学会第26回計算力学講演会  ( 佐賀 )   2013.11 

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  • Crystal Plasticity Modeling and Simulation Considering Behavior of Dislocation Source International conference

    Yoshiteru Aoyagi

    International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan  ( Sendai, Japan )   2013.9 

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  • Crystal Orientation Dependency of Plasticity on Grain Boundary by Indentation Test and Crystal Plasticity Simulation International conference

    Sho SAKUMA, Yoshiteru AOYAGI and Hitoshi SOYAMA

    International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan  ( Sendai, Japan )   2013.9 

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  • Effect of Crystal Orientation and Dislocation Density on Fatigue Crack Propagation International conference

    Yuki IMAI, Yoshiteru AOYAGI and Hitoshi SOYAMA

    International Symposium for the 70th Anniversary of the Tohoku Branch of the Chemical Society of Japan  ( Sendai, Japan )   2013.9 

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  • バルクナノメタルの粒界・転位源挙動に関する結晶塑性シミュレーション

    青柳吉輝, 都留智仁, 下川智嗣

    日本金属学会2013年秋期(第153回)大会  ( 金沢 )   2013.9 

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  • 超微細結晶粒金属材料の転位源挙動を考慮した結晶塑性シミュレーション

    青柳吉輝

    日本材料学会第62期学術講演会講演  ( 東京 )   2013.5 

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  • 粒界の力学特性に関するインデンテーション結晶塑性シミュレーション

    青柳吉輝, 佐久間翔, 髙桑脩, 祖山均

    日本機械学会東北支部第48期総会・講演会  ( 仙台 )   2013.3 

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  • CRYSTAL PLASTICITY MODELING AND SIMULATION CONSIDERING EFFECT OF GRAIN BOUNDARY OF ULTRAFINE-GRAINED METAL Invited International conference

    Yoshiteru Aoyagi, Tomohito Tsuru and Tomotsugu Shimokawa

    The 19th International Symposium on Plasticity and Its Current Applications  ( Nassau, Bahamas )   2013.1 

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  • インデンテーション法による粒界の力学特性評価および結晶塑性シミュレーション

    青柳吉輝, 佐久間翔, 髙桑脩, 祖山均

    日本機械学会東北支部第48期秋季講演会  ( 八戸 )   2012.9 

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  • 転位源としての粒界の影響を考慮した結晶塑性モデリング Invited

    青柳吉輝, 都留智仁, 下川智嗣

    日本金属学会2012年秋期(第151回)大会  ( 松山 )   2012.9 

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  • Crystal Plasticity Simulation on Tension-Compression Asymmetry of Bulk Nanostructured Metals International conference

    Aoyagi, Y. and Shimokawa, T.

    The International Workshop on Bulk Nanostructured Metals  ( Kyoto, Japan )   2012.6 

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  • バルクナノメタルの引張・圧縮非対称性に関するマルチスケールシミュレーション

    青柳吉輝, 下川智嗣

    日本材料学会第61期学術講演会講演  ( 岡山 )   2012.5 

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  • 粒界転位源能力の静水圧依存性に関する原子シミュレーション

    下川智嗣, 堀川一樹, 青柳吉輝

    日本材料学会第61期学術講演会講演  ( 岡山 )   2012.5 

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  • 転位源としての粒界の影響を考慮した結晶塑性モデリング

    青柳吉輝, 加治芳行

    日本金属学会2011年秋期(第149回)大会  ( 沖縄 )   2011.11 

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  • バルクナノメタルにおける粒界型応力腐食割れに関する結晶塑性シミュレーション

    青柳吉輝, 加治芳行

    第55回日本学術会議材料工学連合講演会  ( 京都 )   2011.10 

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  • 転位蓄積による核生成を考慮したMulti-phase-field動的再結晶シミュレーション

    長津輝, 佐藤愼一, 村松眞由, 青柳吉輝, 志澤一之

    第55回日本学術会議材料工学連合講演会  ( 京都 )   2011.10 

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  • A DYNAMIC RECRYSTALLIZATION SIMULATION BASED ON PHASE-FIELD AND DISLOCATION-CRYSTAL PLASTICITY MODELS International conference

    MAYU MURAMATSU, SHINICHI SATO, YOSHITERU AOYAGI AND KAZUYUKI SHIZAWA

    XI International Conference on Computational Plasticity Fundamentals and Applications  ( Barcelona, Spain )   2011.9 

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  • Stress Corrosion Cracking Behavior of Type 304 Stainless Steel Irradiated under Different Neutron Dose Rates at JMTR International conference

    Yoshiyuki Kaji, Keietsu Kondo, Yoshiteru Aoyagi, Yoshiaki Kato, Taketoshi Taguchi, Fumiki Takada, Junichi Nakano, Hirokazu Ugachi, Takashi Tsukada, Kenichi Takakura and Hiroshi Sakamoto

    15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors  ( Colorado, USA )   2011.8 

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  • Simulation on Nanostructured Metals Based on Multiscale Crystal Plasticity Considering Effect of Grain Boundary Invited International conference

    Yoshiteru Aoyagi, Tomotsugu Shimokawa, Kazuyuki Shizawa and Yoshiyuki Kaji

    International Conference on Processing & Manufacturing of Advanced Materials  ( Quebec, Canada )   2011.8 

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  • Crystal Plasticity Simulation Considering Crystal Defect Induced by Irradiation International conference

    Yoshiteru Aoyagi, Tomohito Tsuru, and Yoshiyuki Kaji

    25th Symposium on Effects of Radiation on Nuclear Materials  ( Anaheim, USA )   2011.6 

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  • 再結晶相の方位変化を考慮した転位-結晶塑性モデルおよびPhase-fieldモデルによる動的再結晶シミュレーション

    村松眞由, 青柳吉輝, 只野裕一, 志澤一之

    日本材料学会第60期学術講演会  ( 大阪 )   2011.5 

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  • Multi-phase-field理論および転位-結晶塑性論に基づく動的再結晶に関するマルチフィジックスモデルとそのシミュレーション

    長津輝, 佐藤愼一, 村松眞由, 青柳吉輝, 志澤一之

    日本機械学会関東支部第17期総会講演会  ( 横浜 )   2011.3 

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  • 照射材料の力学特性に関するマルチスケールモデリング

    青柳吉輝, 都留智仁, 加治芳行

    日本機械学会関東支部第17期総会講演会  ( 横浜 )   2011.3 

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  • MODELING AND SIMULATION ON IRRADIATED MATERIAL BASED ON CRYSTAL PLASTICITY CONSIDERING CRYSTAL DEFECT INDUCED BY IRRADIATION Invited International conference

    Yoshiteru Aoyagi and Yoshiyuki Kaji

    The 17th International Symposium on Plasticity and Its Current Applications  ( Puerto Vallarta, Mexico )   2011.1 

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  • Multi-Phase-Fieldモデルおよび転位-結晶塑性モデルに基づく動的再結晶シミュレーション

    佐藤愼一, 村松眞由, 青柳吉輝, 志澤一之

    第54回日本学術会議材料工学連合講演会  ( 京都 )   2010.10 

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  • Crystal Plasticity Simulation on Stress Corrosion Cracking Considering Oxygen Diffusion along Grain Boundary International conference

    Yoshiteru AOYAGI Takahiro IGARASHI and Yoshiyuki KAJI

    Nuclear Materials 2010  ( Kartsruhe, Germany )   2010.10 

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  • 酸素の粒界拡散を考慮した応力腐食割れに関する結晶塑性シミュレーション

    青柳吉輝, 加治芳行

    日本機械学会 M&M2010材料力学カンファレンス  ( 長岡 )   2010.10 

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  • 照射誘起結晶欠陥を考慮した結晶塑性モデリング

    青柳吉輝, 加治芳行

    日本金属学会2010年度秋期(第147回)大会  ( 札幌 )   2010.9 

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  • 超微細粒金属の力学特性に関する擬似3次元トリプルスケール転位-結晶塑性解析

    小野貴裕, 黒澤瑛介, 青柳吉輝, 志澤一之

    日本機械学会第23回計算力学講演会  ( 北見 )   2010.9 

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  • 核生成潜伏期間および臨界核半径を同時に考慮した静的再結晶Phase-Fieldシミュレーション

    村松眞由, 青柳吉輝, 志澤一之

    日本機械学会第23回計算力学講演会  ( 北見 )   2010.9 

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  • Modeling Hardening Characteristics of Metallic Materials under Impact Loading based on Field Theory of Multiscale Plasticity International conference

    Yoshiteru Aoyagi and Tadashi Hasebe

    International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2010  ( Seoul, Korea )   2010.9 

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  • Modeling of Static Recrystallization and Nucleus Growth Simulation Considering Nucleation Incubation Period and Critical Nucleus Radius International conference

    Mayu Muramatsu, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 16th International Conference on Crystal Growth  ( Beijing, China )   2010.8 

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  • 転位パターンおよびマイクロシアバンド形成に基づくFCC金属の結晶粒超微細化に関する結晶塑性シミュレーション

    鈴木航, 小林遼太郎, 青柳吉輝, 志澤一之

    日本学術会議第59回理論応用力学講演会  ( 東京 )   2010.6 

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  • MULTIPHYSICS MODELING AND SIMULATION FOR STRESS CORROSION CRACKING CONSIDERING OXYGEN ATOM DIFFUSION ALONG GRAIN BOUNDARY International conference

    Takahiro IGARASHI, Yoshiteru AOYAGI and Yoshiyuki KAJI

    The 18th International Conference on Nuclear Engineering  ( Xi'an, China )   2010.5 

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  • Field Theory-Based Prediction of Evolving Incompatibility Tensor Field under Wedge Indentation -Simulation Based on Field Theory of Multiscale Plasticity- International conference

    Yoshiteru Aoyagi, Yusuke Tsunemi and Tadashi Hasebe

    KSME-JSME Joint Symposium 2010 on Computational Mechanics and Computer-Aided Engineering  ( Seoul, Korea )   2010.3 

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  • A TRIPLE-SCALE GN DISLOCATION-CRYSTAL PLASTICITY SIMULATION ON MECHANICAL PROPERTIES OF ULTRAFINE-GRAINED METAL Invited International conference

    Eisuke Kurosawa, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 16th International Symposium on Plasticity and Its Current Applications  ( Frigate Bay, St. Kitts & Nevis )   2010.1 

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  • A 3D MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON DISLOCATION PATTERNING Invited International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 16th International Symposium on Plasticity and Its Current Applications  ( Frigate Bay, St. Kitts & Nevis )   2010.1 

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  • MULTISCALE MODELING AND SIMULATION ON DYNAMIC RECRYSTALLIZATION BASED ON PHASE-FIELD METHOD AND DISLOCATION-CRYSTAL PLASTICITY THEORY Invited International conference

    Mayu Muramatsu, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 16th International Symposium on Plasticity and Its Current Applications  ( Frigate Bay, St. Kitts & Nevis )   2010.1 

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  • 転位の増殖率を考慮した反応-拡散モデルの提案および結晶粒超微細化に関する転位-結晶塑性シミュレーション

    青柳吉輝, 志澤一之

    第53回日本学術会議材料工学連合講演会  ( 京都 )   2009.10 

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  • Phase-Field理論および転位-結晶塑性論に基づく動的再結晶現象に対するマルチスケールモデリング

    村松眞由, 青柳吉輝, 志澤一之

    第53回日本学術会議材料工学連合講演会  ( 京都 )   2009.10 

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  • 不純物の粒界拡散が粒界割れ挙動に及ぼす影響

    五十嵐誉廣, 青柳吉輝, 加治芳行

    日本機械学会第22回計算力学講演会  ( 金沢 )   2009.10 

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  • 超微細粒金属の加工硬化特性に関するトリプルスケールGN転位-結晶塑性シミュレーション

    黒澤瑛介, 青柳吉輝, 志澤一之

    日本機械学会第22回計算力学講演会  ( 金沢 )   2009.10 

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  • 結晶格子スケールの保存則に基づくPhase-Fieldモデルを用いた核生成および核成長シミュレーション

    佐藤愼一, 村松眞由, 青柳吉輝, 志澤一之

    日本機械学会第22回計算力学講演会  ( 金沢 )   2009.10 

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  • MULTISCALE CRYSTAL PLASTICITY MODELING AND SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON EVOLUTION OF DISLOCATION STRUCTURES Invited International conference

    R. Kobayashi, Y. Aoyagi and K. Shizawa

    X International Conference on Computational Plasticity Fundamentals and Applications  ( Barcelona, Spain )   2009.9 

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  • FCC超微細粒焼鈍材の微視的降伏挙動に関するトリプルスケール結晶塑性シミュレーション

    黒澤瑛介, 青柳吉輝, 志澤一之

    日本学術会議第58回理論応用力学講演会  ( 東京 )   2009.6 

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  • 簡単化された転位の反応-拡散モデルによる結晶粒超微細化に関する擬似3次元結晶塑性シミュレーション

    小林遼太郎, 青柳吉輝, 志澤一之

    日本材料学会第58期学術講演会  ( 松山 )   2009.5 

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  • 転位セル形成とサブグレイン遷移を表現するPhase-Fieldモデルの提案およびそのシミュレーション

    志澤一之, 佐久間正寿,青柳吉輝

    日本計算工学会第14回計算工学講演会  ( 東京 )   2009.5 

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  • 転位挙動に基づく結晶粒超微細化プロセスに関する結晶塑性シミュレーション

    志澤一之, 青柳吉輝, 只野裕一

    日本金属学会2009年度春期(第144回)大会  ( 東京 )   2009.3 

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  • A TRIPLE SCALE SIMULATION ON SIZE-EFFECTS OF ULTRAFINE-GRAINED METAL BASED ON GEOMETRICALLY NECESSARY CRYSTAL DEFECTS International conference

    Kazuyuki Shizawa, Eisuke Kurosawa and Yoshiteru Aoyagi

    The 15th International Symposium on Plasticity and Its Current Applications  ( St. Thomas, USA )   2009.1 

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  • A PSEUDO-3D MULTISCALE SIMULATION ON ULTRAFINE-GRAINING OF FCC POLYCRYSTAL BASED ON EVOLUTION OF DISLOCATION STRUCTURES Invited International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 15th International Symposium on Plasticity and Its Current Applications  ( St. Thomas, USA )   2009.1 

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  • 転位密度の基準値の上昇を考慮した転位パターニングに基づく結晶粒微細化に関するマルチスケール結晶塑性シミュレーション

    鈴木航, 小林遼太郎, 青柳吉輝, 志澤一之

    日本機械学会第21回計算力学講演会  ( 沖縄 )   2008.11 

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  • FCC微細粒焼鈍材の降伏点降下に関するトリプルスケールGN転位-結晶塑性シミュレーション

    森一真, 黒澤瑛介, 青柳吉輝, 志澤一之

    日本機械学会第21回計算力学講演会  ( 沖縄 )   2008.11 

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  • 変形に伴う転位密度の基準値の上昇を考慮した反応-拡散モデルおよびFDMシュレーション

    小林遼太郎, 鈴木航, 青柳吉輝, 志澤一之

    第52回日本学術会議材料工学連合講演会  ( 京都 )   2008.10 

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  • A Triple-Scale Crystal Plasticity Simulation on Strength and Ductility of Ultrafine-Grained Metals International conference

    Eisuke Kurosawa, Yoshiteru Aoyagi, Yuichi Tadano and Kazuyuki Shizawa

    The 4rd International Conference on Nanomaterials by Severe Plastic Deformation  ( Goslar, Germany )   2008.8 

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  • Multiscale Crystal Plasticity Simulation with Pseudo-Three-Dimensional Model on Ultrafine-Graining Based on Evolution of Dislocation Structures International conference

    Yoshiteru Aoyagi, Naohiro Horibe and Kazuyuki Shizawa

    The 4rd International Conference on Nanomaterials by Severe Plastic Deformation  ( Goslar, Germany )   2008.8 

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  • 転位パターニングに基づく超微細粒形成に関する擬似3次元結晶塑性解析

    志澤一之, 青柳吉輝

    日本機械学会2008年度年次大会  ( 横浜 )   2008.8 

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  • 多重すべりを考慮した転位パターニングに関する反応-拡散モデルおよびFDMシミュレーション

    青柳吉輝, 小林遼太郎, 堀部尚裕, 志澤一之

    日本材料学会第57期学術講演会講演  ( 鹿児島 )   2008.5 

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  • 超微細粒金属材料の降伏挙動に関するトリプルスケール結晶塑性シミュレーション

    黒澤瑛介, 青柳吉輝, 只野裕一, 志澤一之

    日本計算工学会第13回計算工学講演会  ( 仙台 )   2008.5 

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  • Reproducing Kernel Based Evaluation of Incompatibility Tensor in Field Theory of Plasticity International conference

    Y. Aoyagi, T. Hasebe, J. S. Chen, P. C. Guan

    The 3rd Asian-Pacific Congress on Computational Mechanics and the 11th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science  ( Kyoto, Japan )   2007.12 

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  • A Triple Scale Crystal Plasticity Modeling Based on Geometrically Necessary Crystal Defects and Homogenization Method and Simulation on Size Effect for Polycrystal International conference

    E. Kurosawa, Y. Aoyagi, Y. Tadano, K. Shizawa

    The 3rd Asian-Pacific Congress on Computational Mechanics and the 11th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science  ( Kyoto, Japan )   2007.12 

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  • Multiscale Crystal Plasticity Simulation on Ultrafine-Graining Based on Evolution of Dislocation Structures and Accumulation of Geometrically Necessary Dislocations International conference

    Yoshiteru Aoyagi, Masatoshi Sakuma, Nohiro Horibe, Kazuyuki Shizawa

    The 3rd Asian-Pacific Congress on Computational Mechanics and the 11th International Conference on the Enhancement and Promotion of Computational Methods in Engineering and Science  ( Kyoto, Japan )   2007.12 

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  • トリプルスケール結晶塑性シミュレーションおよび結晶粒微細化に伴う寸法効果の検討

    黒澤瑛介, 青柳吉輝, 只野裕一, 志澤一之

    日本機械学会第20回計算力学講演会  ( 京都 )   2007.11 

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  • 巨大ひずみ付与による結晶粒超微細化に関するマルチスケール結晶塑性シミュレーション

    小林遼太郎, 佐久間正寿, 堀部尚裕, 青柳吉輝, 志澤一之

    日本機械学会第20回計算力学講演会  ( 京都 )   2007.11 

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  • 巨大ひずみ導入による超微細粒組織形成の計算力学的予測

    志澤一之, 青柳吉輝

    日本機械学会2007年度年次大会  ( 大阪 )   2007.9 

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  • 転位のパターン形成と材料特性の発現

    青柳吉輝, 志澤一之

    プロセッシング計算力学分科会第14回セミナー日本鉄鋼協会数理モデリングフォーラム特別講演会  ( 東京 )   2007.9 

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  • MULTISCALE CRYSTAL PLASTICITY SIMULATION ON ULTRAFINE-GRAINING BASED ON DISLOCATION PATTERNING AND GEOMETRICALLY NECESSARY DISLOCATION Invited International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 13th International Symposium on Plasticity and Its Current Applications  ( Alaska, USA )   2007.6 

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  • 繰返し変形による不均質場の発展に関するマルチスケール結晶塑性シミュレーション

    長谷部忠司, 青柳吉輝

    日本材料学会第56期学術講演会  ( 名古屋 )   2007.5 

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  • 転位パターンおよびGN転位蓄積に基づく結晶粒微細化に関するマルチスケール結晶塑性シミュレーション

    青柳吉輝, 佐久間正寿, 堀部尚裕, 志澤一之

    日本材料学会第56期学術講演会  ( 名古屋 )   2007.5 

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  • 転位パターニングに基づく微細結晶粒形成に関するマルチスケール結晶塑性シミュレーション

    青柳吉輝, 志澤一之

    第15回ヤングサイエンティストフォーラム  ( 千葉 )   2007.3 

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  • 均質化法を用いたGN転位-結晶塑性シミュレーションおよび結晶粒微細化に伴う寸法効果に関する検討

    黒澤瑛介, 佐藤駿次, 海宝寿実雄, 青柳吉輝, 只野裕一, 志澤一之

    第56回理論応用力学講演会  ( 東京 )   2007.3 

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  • 不適合度テンソルの新しい物理的描像に基づく不均質場の発展に関するマルチスケール結晶塑性モデリング

    長谷部忠司, 青柳吉輝

    第56回理論応用力学講演会  ( 東京 )   2007.3 

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  • 転位パターニングに基づく結晶粒微細化に関するマルチスケール結晶塑性シミュレーション

    青柳吉輝, 堀部尚裕, 山木直, 志澤一之

    第56回理論応用力学講演会  ( 東京 )   2007.3 

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  • サブグレインからの核生成と再結晶に関するPhase-fieldシミュレーション

    味岡秀恭, 青柳吉輝, 只野裕一, 志澤一之

    日本機械学会第19回計算力学講演会  ( 名古屋 )   2006.11 

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  • 新しい物理的描像に基づく不適合度テンソルを用いた転位下部組織モデリング

    青柳吉輝, 長谷部忠司

    日本機械学会第19回計算力学講演会  ( 名古屋 )   2006.11 

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  • 転位パターニングに基づくサブグレインの大角化に関する結晶塑性シミュレーション

    佐久間正寿, 堀部尚裕, 山木直, 青柳吉輝, 志澤一之

    日本機械学会第19回計算力学講演会  ( 名古屋 )   2006.11 

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  • 不適合度テンソルを用いた内部応力場を伴なう金属微視組織の形成シミュレーション

    藤野佑一, 青柳吉輝, 長谷部忠司, 冨田佳宏

    日本機械学会第19回計算力学講演会  ( 名古屋 )   2006.11 

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  • 結晶粒微細化に伴う寸法効果および脆化に関するGN転位-結晶塑性シミュレーション

    佐藤駿次, 海宝寿実雄, 青柳吉輝, 只野裕一, 志澤一之

    日本機械学会第19回計算力学講演会  ( 名古屋 )   2006.11 

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  • New Physical Interpretation of Incompatibility and Application to Dislocation Substructure Evolution International conference

    Yoshiteru Aoyagi and Tadashi Hasebe

    The 8th Asia-Pacific Symposium on Engineering Plasticity and Its Applications  ( Nagoya, Japan )   2006.9 

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  • Multiscale Modeling and Simulation of Crystal Plasticity Based on Dislocation Patterning in Polycrystal International conference

    Naoshi Yamaki, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 8th Asia-Pacific Symposium on Engineering Plasticity and Its Applications  ( Nagoya, Japan )   2006.9 

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  • 結晶粒方位差に基づく転位パターニングに関する転位-結晶塑性シミュレーション

    山木直,堀部尚裕,青柳吉輝,志澤一之

    日本機械学会2006年度年次大会  ( 熊本 )   2006.9 

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  • MULTISCALE SIMULATION ON DISLOCATION PATTERNING AND CRYSTAL PLASTICITY FOR HETEROGENEOUS POLYCRYSTAL Invited International conference

    Kazuyuki Shizawa, Naoshi Yamaki and Yoshiteru Aoyagi

    The 12th International Symposium on Plasticity and Its Current Applications  ( Halifax, Canada )   2006.7 

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  • MULTISCALE CRYSTAL PLASTICITY MODEL BASED ON GEOMETRICALLY NECESSARY CRYSTAL DEFECTS AND SIMULATION ON FINE-GRAINING AND SIZE EFFECT FOR POLYCRYSTAL Invited International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 12th International Symposium on Plasticity and Its Current Applications  ( Halifax, Canada )   2006.7 

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  • 多結晶体における結晶粒微細化および寸法効果に関するGN転位-結晶塑性シミュレーション

    海宝寿実雄, 大石真吾, 青柳吉輝, 志澤一之

    日本材料学会第55期学術講演会  ( 長岡 )   2006.5 

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  • 不適合度テンソルの新しい物理的描像と転位下部組織モデリングへの適用

    青柳吉輝, 長谷部忠司

    日本材料学会第55期学術講演会  ( 長岡 )   2006.5 

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  • Dislocation Patterning for Cell Structures and Subgrains in Polycrystal International conference

    N. Yamaki, Y. Aoyagi and K. Shizawa

    International Conference on Computational and Experimental Engineering and Sciences  ( Chennai, India )   2005.12 

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  • 多結晶体における転位パターニングを考慮した転位-結晶塑性シミュレーション

    堀部尚裕, 山木直, 青柳吉輝, 志澤一之

    日本機械学会第18回計算力学講演会  ( つくば )   2005.11 

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  • 結晶粒微細化および寸法効果に関するGN転位-結晶塑性シミュレーション

    海宝寿実雄, 大石真吾, 青柳吉輝, 志澤一之

    日本機械学会第18回計算力学講演会  ( つくば )   2005.11 

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  • Modeling and Simulation of Crystal Plasticity Based on GN Crystal Defects for Ultrafine-Grained Metals Induced by Severe Plastic Deformation International conference

    Shingo Oishi, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 3rd International Conference on Nanomaterials by Severe Plastic Deformation  ( Fukuoka, Japan )   2005.9 

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  • Dislocation-Crystal Plasticity Simulation Based on Self-Organization for Repartition of Dislocation Cell Structures and Subgrains International conference

    Naoshi Yamaki, Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 3rd International Conference on Nanomaterials by Severe Plastic Deformation  ( Fukuoka, Japan )   2005.9 

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  • 強ひずみ付与による結晶粒微細化に関するGN転位-結晶塑性シミュレーション

    青柳吉輝, 大石真吾, 志澤一之

    日本材料学会第54期学術講演会  ( 仙台 )   2005.5 

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  • 転位セル構造の再分割に関する自己組織化を考慮した転位-結晶塑性シミュレーション

    山木直, 安藤哲朗, 青柳吉輝, 志澤一之

    第54回理論応用力学講演会  ( 東京 )   2005.1 

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  • MULTISCALE MODELING AND SIMULATION ON FORMATION OF ULTRAFINE-GRAINED METALS BASED ON SELF-ORGANIZATION OF CELL STRUCTURES AND SUBGRAINS Invited International conference

    Kazuyuki Shizawa and Yoshiteru Aoyagi

    The 11th International Symposium on Plasticity and Its Current Applications  ( Kauai, USA )   2005.1 

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  • MULTISCALE MODELING AND SIMULATION OF CRYSTAL PLASTICITY BASED ON GN CRYSTAL DEFECTS FOR PRODUCTION OF ULTRAFINE-GRAINED METALS Invited International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    The 11th International Symposium on Plasticity and Its Current Applications  ( Kauai, USA )   2005.1 

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  • MULTISCALE MODELING AND SIMULATION OF CRYSTAL PLASTICITYBASED ONGN CRYSTALDEFECTS CONSIDERING DYNAMIC RECOVERY OF DISLOCATION International conference

    S. Oishi, Y. Aoyagi and K. Shizawa

    International Conference on Computational Methods 2004  ( Singapore, Singapore )   2004.12 

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  • 転位セル構造の再分割に関する自己組織化モデルとシミュレーション

    安藤哲朗, 青柳吉輝, 志澤一之

    日本機械学会第17回計算力学講演会  ( 仙台 )   2004.11 

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  • 結晶粒の超微細粒化に関する動的回復を考慮したGN転位-結晶塑性シミュレーション

    青柳吉輝, 大石真吾, 志澤一之

    日本機械学会第17回計算力学講演会  ( 仙台 )   2004.11 

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  • 転位飛行距離と硬化則に動的回復を導入したGN転位-結晶塑性シミュレーション

    青柳吉輝, 大石真吾, 志澤一之

    第48回日本学術会議材料研究連合講演会  ( 東京 )   2004.10 

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  • Modeling and Simulation of Multi-Scale Crystal Plasticity Based on Self-Organization of Dislocation Cell and Subgrain for Production of Ultra-Fine Grained Metals International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    ASME/JSME 2004 Pressure Vessels and Piping Division Conference  ( San Diego, USA )   2004.7 

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  • GN結晶欠陥および動的回復を考慮した超微細粒生成に関する転位-結晶塑性シミュレーション

    青柳吉輝, 池田哲秀, 志澤一之

    日本材料学会第53期学術講演会  ( 岡山 )   2004.5 

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  • 超微細サブグレインの自己組織化に関する転位-結晶塑性シミュレーション

    志澤一之, 青柳吉輝, 藤本敦

    日本材料学会第53期学術講演会  ( 岡山 )   2004.5 

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  • 転位セル構造・サブグレインの自己組織化を伴うFCC結晶の3段階硬化に関する転位-結晶塑性シミュレーション

    安藤哲朗, 藤本敦, 青柳吉輝, 志澤一之

    日本機械学会第16回計算力学講演会  ( 神戸 )   2003.11 

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  • FCC単結晶の強ひずみ変形による超微細粒化に関するGN転位

    池田哲秀, 青柳吉輝, 志澤一之

    日本機械学会第16回計算力学講演会  ( 神戸 )   2003.11 

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  • 単一・2重すべりにおけるせん断帯形成の相違に関するGN結晶欠陥を考慮した3次元転位-結晶塑性シミュレーション

    青柳吉輝, 志澤一之

    日本機械学会第16回計算力学講演会  ( 神戸 )   2003.11 

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  • A CRYSTAL PLASTICITY ANALYSIS ON ACCUMULATION OF GEOMETRICALLY NECESSARY DISLOCATION AND DIPOLE AROUND AN INCLUSION International conference

    Yoshiteru Aoyagi and Kazuyuki Shizawa

    International Conference for Mesomechanics  ( Tokyo, Japan )   2003.8 

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  • A CRYSTAL PLASTICITY ANALYSIS FOR ACCUMULATIONS OF GEOMETRICALLY NECESSARY DISLOCATIONS AND DIPOLES AROUND SHEAR BAND International conference

    Yoshiteru AOYAGI and Kazuyuki SHIZAWA

    International Union of Theoretical and Applied Mechanics Symposium 2003  ( Osaka, Japan )   2003.7 

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  • せん断帯まわりの幾何学的に必要なダイポール蓄積に関する結晶塑性解析

    青柳吉輝, 池田哲秀,志澤一之

    第52回理論応用力学講演会  ( 東京 )   2003.1 

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  • 転位ダイポール密度の幾何学的定義と介在物まわりのダイポール蓄積に関する結晶塑性解析

    青柳吉輝, 志澤一之

    日本機械学会第15回計算力学講演会  ( 鹿児島 )   2002.11 

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  • GN転位密度とダイポール密度を考慮したせん断帯形成に関する結晶塑性解析

    菅公彦, 青柳吉輝, 志澤一之

    第51回理論応用力学講演会  ( 東京 )   2002.1 

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  • せん断帯まわりのGN転位およびダイポール蓄積に関する結晶塑性解析

    青柳吉輝, 志澤一之

    日本機械学会第14回計算力学講演会  ( 札幌 )   2001.11 

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Awards

  • 日本銅学会第58回論文賞

    2024.10   一般社団法人日本伸銅協会内日本銅学会   ヘテロナノ組織Cu–Zn–Si合金溝ロール圧延棒材の強化機構

    三浦 博己, 松尾 潔剛, 大場 洋次郎, 青柳 吉輝, 渡邊 千尋

  • 日本材料学会学術奨励賞

    2017.5   公益社団法人日本材料学会   超微細結晶粒金属材料の力学特性を予測するマルチスケールモデリングに関する研究

    青柳吉輝

  • 科学技術分野の文部科学大臣表彰若手科学者賞

    2017.4   文部科学省   超微細結晶粒材料の力学特性予測モデルの研究

    青柳吉輝

  • 日本金属学会第62回論文賞

    2014.9   日本金属学会   Influence of Competition between Intragranular Dislocation Nucleation and Intergranular Slip Transfer on Mechanical Properties of Ultrafine-Grained Metals

    Tomohito Tsuru, Yoshiteru Aoyagi, Yoshiyuki Kaji, Tomotsugu Shimokawa

  • Young Scientist Award

    2010.9   International Symposium on Explosion, Shock wave and High-energy reaction Phenomena 2010 (3rd ESHP Symposium)   Modeling Hardening Characteristics of Metallic Materials under Impact Loading based on Field Theory of Multiscale Plasticity

    青柳吉輝

  • 日本材料学会優秀講演発表賞

    2007.5   社団法人日本材料学会   転位パターンおよびGN転位蓄積に基づく結晶粒微細化に関するマルチスケール結晶塑性シミュレーション

    青柳吉輝

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Research Projects

  • 常識を超える超々高強度ヘテロナノ組織の強化機構の解明と大型材試作研究

    Grant number:26K01243  2026.4 - 2029.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)  豊橋技術科学大学

    三浦 博己, 渡邊 千尋, 青柳 吉輝

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    Grant amount: \18460000 ( Direct Cost: \14200000 、 Indirect Cost: \4260000 )

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  • Development of Statistical Plasticity for Reconstruction of Macroscopic Material Properties Induced by Microscopic Fluctuations

    Grant number:21K03745  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)  Tohoku University

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    Grant amount: \4160000 ( Direct Cost: \3200000 、 Indirect Cost: \960000 )

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  • 豊かな老後を護る医療用超高強度・低弾性率ヘテロナノ純チタンの開発

    Grant number:20H00305  2020.4 - 2023.3

    日本学術振興会  科学研究費助成事業 基盤研究(A)  基盤研究(A)  豊橋技術科学大学

    三浦 博己, 下川 智嗣, 渡邊 千尋, 青柳 吉輝

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    Grant amount: \46280000 ( Direct Cost: \35600000 、 Indirect Cost: \10680000 )

    工業用純チタン(2種)に多軸鍛造(Multi-Directional Forging/MDF)後に平圧延,溝ロール圧延を適用し,板材とワイヤーを作製した.板材は,引張強度900MPa以上と塑性伸び15%前後の優れた機械的特性を有していた.一方,溝ロール圧延材は,ほぼ同等以上の引張強度を有していた.この中で特性が安定して大量に作りやすい板材を金沢大に送付し,各種特性調査を行って頂いた.その結果,i) 板材には力学的特性の異方性がある事,ii) 機械的特性に大きな結晶粒径依存性がある事,iii) 比較的低温で再結晶が起こり,当時首細粒名変化する事,等が明らかとなった.
    また,実験によって得られた各種結晶塑性・力学的特性情報を金沢大と東北大の計算グループに提供し,その変形挙動と特性発現機構についてシミュレーションを行って頂いた.その結果,ヘテロナノ超微細粒チタンの塑性変形は,主として変形双晶の形成と粒界からの転位放出によってまかなわれている可能性が示唆された.さらに,より高強度化するためには,底面が板材圧延面と平行,底面が棒材長手方向と平行である事が望ましいが,その場合,ヤング率が高くなってしまうことも示された.
    一部MDF材は,医科歯科系大学の研究室に提供され,フッ素溶液に対する耐食性と歯科パーシャルデンチャーとしての適用の可能性について検討して頂いた.その結果,フッ素溶液に対する耐食性は,従来の通常粒サイズの純チタンと同等だが,表面粗さが大きくなる特徴が見いだされた.また,歯科パーシャルデンチャーとして重要な耐摩耗性は一般的な純チタンと同等で,プラーク付着も同等だが,切削加工性に優れることが見いだされた.
    得られた各種情報から,ヘテロナノチタンの特性を加工熱処理法によって制御し,より優れたインプラント用純チタンとして開発する方向が示された.

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  • Research and development of "ultra" high-strength Copper alloys for electronic devices utilizing heterogeneous-nano structure

    Grant number:20H02461  2020.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)  Kanazawa University

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    Grant amount: \17940000 ( Direct Cost: \13800000 、 Indirect Cost: \4140000 )

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  • 計算材料科学によるハイエントロピー合金の力学特性の解明と制御

    2018.4 - 2023.3

    MEXT  Grant-in-Aid for Scientific Research 

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  • Creation of Integrated Material Design System on Material Lifecycle

    Grant number:17KK0108  2018.3 - 2020.4

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research)  Fund for the Promotion of Joint International Research (Fostering Joint International Research)  Tohoku University

    Aoyagi Yoshiteru

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    Grant amount: \15210000 ( Direct Cost: \11700000 、 Indirect Cost: \3510000 )

    For true materials design, it is necessary to construct an integrated materials design system that encompasses the entire life cycle of structural materials (production, processing, use, degradation, and reuse). In this international collaborative research, we attempted to achieve a breakthrough in structural materials design methodologies through the collaboration of professionals in the field who are skilled in multiscale modeling for different scales. By integrating the material design knowledge of an international collaborator into the multiscale model proposed by the principal investigator, we have created a part of an integrated computational material design system for structural material lifecycle.

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  • Creation of Practical CAE System Predicting Mechanical Properties of Advanced Materials on the Basis of Microstructures

    Grant number:16H06059  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)  Grant-in-Aid for Young Scientists (A)  Tohoku University

    Aoyagi Yoshiteru

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    Grant amount: \25350000 ( Direct Cost: \19500000 、 Indirect Cost: \5850000 )

    A CAE system was established to reproduce the deformation behavior of advanced materials, such as fiber-reinforced thermoplastics and ultrafine-grained metal materials. Such advanced materials will be rapidly used as structural materials in the future. We numerically predicted the yield function used in CAE for structural analysis based on the experimental multiscale mechanics. The deformation behavior of advanced materials was described based on information on the microstructure obtained from experimental observations. The estimation system for contours of constant plastic work was improved by comparing the analysis results with the experimental results of microstructural observations and biaxial tensile tests. By installing the yield function into general-purpose structural analysis software, it is possible to seamlessly connect a series of processes from material design to development and practical use using CAE.

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  • 非線形解析を用いた高分子材料のパフォーマンス予測技術

    2015.9 - 2019.3

    Funded Research 

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  • オーステナイト鋼への単純強圧延によるヘテロナノ構造の付与と超高強度化の実現

    2014.9 - 2018.3

    Funded Research 

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  • New material creation following biomineralization - Challenge to control lime scale -

    Grant number:15K13823  2015.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research  Tohoku University

    Soyama Hitoshi

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    Grant amount: \3900000 ( Direct Cost: \3000000 、 Indirect Cost: \900000 )

    In order to generate calcium carbonate applicable to structural materials that follow biomineralization such as shell and crustaceans, mechanical properties of materials produced by biomineralization such as shell and crab were investigated, and production of calcium carbonate by laser was tried inspiring by lime scale such as water scale. It was revealed that many shells were aragonite, the exterior shell and the scallops were calcite, that the yield stress of aragonite was about 1 GPa and the yield stress of calcite was about 400 MPa using an inverse analysis of an indentation test. It was also demonstrated that calcium carbonate could be generated by irradiating a laser beam to a test specimen placed in the aqueous calcium hydrogen carbonate solution.

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  • Modeling of polymer plasticity based on plastic deformation of crystalline and amorphous phases

    Grant number:25630003  2013.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research  Tohoku University

    AOYAGI Yoshiteru

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    Grant amount: \4030000 ( Direct Cost: \3100000 、 Indirect Cost: \930000 )

    Micro structures and stress-strain response of polypropylene with different spherulite size prepared by changing the cooling conditions in order to investigate effects of crystalline and amorphous structures on mechanical properties of crystalline polymers. The crystallinity, elastic modulus and yield stress increase with increasing spherulite size. We perform a polymer plasticity simulation considering a spherulite structure consisting of the amorphous and crystalline phases. Information on the crystallinity of spherulite obtained from experiments is introduced into a computational model. We thoroughly evaluate the effect of the spherulite structure on the material properties of polypropylene. Moreover, we investigate microscopic plasticity behavior of crystalline and amorphous phases by the molecular dynamics simulation. Localized slip deformation is propagated thorough the sample with kink rotation of molecular chains.

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  • Research on Hybrid Peening and Its Application for Suppression of Hydrogen Embrittlement

    Grant number:24360040  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)  Tohoku University

    SOYAMA Hitoshi, IGA Yuka, TAKAKUWA Osamu, AOYAGI Yoshiteru

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    Grant amount: \18590000 ( Direct Cost: \14300000 、 Indirect Cost: \4290000 )

    In order to suppress of hydrogen embrittlement of metallic materials, which is an obstacle to realize hydrogen society, “hybrid peening” was established. Here, “hybrid peening” means a mechanical surface treatment which combined with different peening method such cavitation peening, laser peening and shot peening. In the present research, suppression of hydrogen embrittlement of chrome molybdenum steel and stainless steel by the peening was demonstrated by experimentally. It was also revealed that the peening reduced invention of hydrogen into metallic materials by introducing compressive residual stress into the materials and the peening suppressed the hydrogen embrittlement of the metallic materials.

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  • Analysis of mechanical properties of bulk nanostructured metals by large-scale computing on the defects evolution

    Grant number:22102007  2010.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Kanazawa University

    SHIMOKAWA Tomotsugu, AOYAGHI Yoshiteru, TSURU Tomohito

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    Grant amount: \98410000 ( Direct Cost: \75700000 、 Indirect Cost: \22710000 )

    In bulk nanostructured metals, the volume fraction of grain boundary and interface (plane defects) rapidly increases. Thus, it is very important to investigate the development of lattice defects through grain boundaries, which is closely related with the anomalous mechanical characteristics of BNMs. In this study, the development of
    complicated interior lattice defects in BNMs was expressed by the large-scale calculation by the atomistic model which can directly express atomic structure of grain boundary (molecular dynamics) and the continuum modeling considering the effect of grain boundaries (crystal plasticity theory), and we investigated the grain size dependence of the following phenomena: (1) dislocation emissions from grain boundaries, (2) the crack tip plasticity based on the interaction between dislocations and grain boundaries, and (3) the propagation mechanism of the plastic deformation based on the formation and dissipation of lattice defects.

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  • Multiscale Phase-field Model Based on Conservation Laws and Recrystallization Simulation

    Grant number:21560101  2009.4 - 2012.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)  Japan Atomic Energy Agency

    AOYAGI Yoshiteru, SHIZAWA Kazuyuki

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    Authorship:Principal investigator 

    Grant amount: \4680000 ( Direct Cost: \3600000 、 Indirect Cost: \1080000 )

    A phase-field model is constructed from conservation laws corresponding to the energy principle. The conservation laws are derived by microscopic physical quantities on the crystal lattice scale. A static recrystallization phenomenon is calculated by the presented model. Moreover, coupling the multi-phase-field model and the dislocation-crystal plasticity model, we construct a dynamic recrystallization model considering nucleation based on dislocation accumulation.

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  • Triple-scale Dislocation-crystal Plasticity Modeling for Evaluation on Mechanical Properties of Ultrafine-Grained Metal

    Grant number:21560100  2009.4 - 2012.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)  Keio University

    SHIZAWA Kazuyuki, AOYAGI Yoshiteru

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    Authorship:Coinvestigator(s) 

    Grant amount: \4680000 ( Direct Cost: \3600000 、 Indirect Cost: \1080000 )

    In this study, it has been succeeded that peculiar mechanical behaviors occurring in f. c. c. ultrafine-grained metals, i. e., increase of strength and decrease of ductility with decrease of grain size, yield stress drop and propagation of Luders band are computationally reproduced by using a critical resolved shear stress model proposed newly for situation of dislocation exhaustion and by developing a multiscale crystal plasticity model bridging three hierarchical scales, i. e., dislocation structure, grain aggregates and macroscopic structure through the homogenization method. Moreover, a mechanism of ductility improvement of bimodal structures with coarse grains dispersed in ultrafine-grained matrix is also discussed.

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  • 巨大ひずみによる結晶粒超微細化に関する転位-結晶塑性シミュレーション

    Grant number:19025010  2007.4 - 2009.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas  Grant-in-Aid for Scientific Research on Priority Areas  Keio University

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    Grant amount: \2900000 ( Direct Cost: \2900000 )

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Committee Memberships

  • 2021.6 - Now

    日本材料学会   企画・広報委員  

  • 2017.9 - Now

    International Journal of Plasticity   Editorial Board (Editorial Advisory Board)  

  • 2017.6 - Now

    日本材料学会   編集委員会調査委員  

  • 2021.6 - 2026.5

    日本材料学会塑性工学部門   企画広報委員会担当幹事  

  • 2025.7    

    The 20th International Conference on Strength of Materials   Local committee  

  • 2025.6    

    International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications   Topic Coordinator  

  • 2023.3    

    日本機械学会 東北支部 第58期総会・講演会   実行委員  

  • 2012.6 - 2021.5

    日本材料学会塑性工学部門   広報幹事  

  • 2016.1    

    Plasticity, Damage & Fracture 2016   Minisymposium Organizer  

  • 2013.4    

    日本機械学会 東北支部 第48期総会・講演会   実行委員  

  • 2010.10 - 2012.3

    日本金属学会   欧文誌特集企画世話人  

  • 2008.4 - 2010.3

    日本機械学会メカライフ編修委員会   委員  

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