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Computational study on size dependent fatigue of materials

Research Project

Project/Area Number 17K18827
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Mechanics of materials, Production engineering, Design engineering, and related fields
Research InstitutionOsaka University

Principal Investigator

Ogata Shigenobu  大阪大学, 基礎工学研究科, 教授 (20273584)

Co-Investigator(Kenkyū-buntansha) 石井 明男 (シャードンバオ)  大阪大学, 基礎工学研究科, 助教 (80773340)
Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords疲労 / ナノ材料 / 分子動力学 / 反応速度論 / 格子欠陥 / ナノワイヤ / 分子動力学解析 / 転位 / 計算力学 / 離散転位動力学法 / 原子モデル / 計算科学 / サイズ依存性
Outline of Final Research Achievements

A theoretical model based on transition state theory for predicting fatigue life of nano-materials has been established. In the model, the fatigue life is described by a function of loading amplitude, loading frequency, and system temperature. To demonstrate validity of the theory, molecular dynamics fatigue simulations to Cu nano-wire has been performed under different loading amplitudes, loading frequencies, and system temperatures. It has been confirmed that the theory well-predicts the fatigue life of the nano-wire directly estimated by the molecular dynamics fatigue simulations under the different conditions.

Academic Significance and Societal Importance of the Research Achievements

学問的には、18世紀の産業革命以来、長年にわたって構築されてきた材料疲労の学問体系に、新たにサイズの概念を導入することで、疲労の学問体系に不連続な発展をもたらすものである。また工学的には、近年実用化が加速しているナノ材料の疲労寿命を、様々な力学環境下、温度環境下において予測することを可能とし、ナノ材料によって構成されるナノ構造体の長期運用下での信頼性の向上に資するものである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (19 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 8 results,  Invited: 8 results)

  • [Int'l Joint Research] 西安交通大学(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] MIT/ジョンズホプキンス大(米国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Controlled growth of single-crystalline metal nanowires via thermomigration across a nanoscale junction2019

    • Author(s)
      Xie De-Gang、Nie Zhi-Yu、Shinzato Shuhei、Yang Yue-Qing、Liu Feng-Xian、Ogata Shigenobu、Li Ju、Ma Evan、Shan Zhi-Wei
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 4478-4478

    • DOI

      10.1038/s41467-019-12416-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Atomistic prediction of the temperature- and loading-rate-dependent first pop-in load in nanoindentation2019

    • Author(s)
      Sato Yuji、Shinzato Shuhei、Ohmura Takahito、Ogata Shigenobu
    • Journal Title

      International Journal of Plasticity

      Volume: 121 Pages: 280-292

    • DOI

      10.1016/j.ijplas.2019.06.012

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Atomistic insights on the influence of pre-oxide shell layer and size on the compressive mechanical properties of nickel nanowires2019

    • Author(s)
      Gurcan Aral, Md Mahbubul Islam, Yun-Jiang Wang, Shigenobu Ogata, and Adri C. T. van Duin
    • Journal Title

      Journal of Applied Physics

      Volume: 125 Issue: 16

    • DOI

      10.1063/1.5080640

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mechanism of Hardening and Damage Initiation in Oxygen Embrittlement of Body-Centred-Cubic Niobium2019

    • Author(s)
      Ping-Jiong Yang, Qing-Jie Li, Tomohito Tsuru, Shigenobu Ogata, Jie-Wen Zhang, Hong-Wei Sheng, Zhi-Wei Shan, Gang Sha, Wei-Zhong Han, Ju Li, Evan Ma
    • Journal Title

      Acta Materialia

      Volume: 168 Pages: 331-342

    • DOI

      10.1016/j.actamat.2019.02.030

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Oxyhydroxide of metallic nanowires in a molecular H2O and H2O2 environment and their effects on mechanical properties2018

    • Author(s)
      Gurcan Aral, Md Mahbubul Islam, Yun-Jiang Wang, Shigenobu Ogata and Adri C. T. van Duin
    • Journal Title

      Phys. Chem. Chem. Phys.

      Volume: 20 Issue: 25 Pages: 17289-17289

    • DOI

      10.1039/c8cp02422g

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Study of Interstitial Atom Diffusion in Nanowire using Diffusion Equation driven by Chemo-Mechanical Potential2018

    • Author(s)
      新里秀平,糟谷瑛,尾方成信
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 67 Issue: 2 Pages: 263-268

    • DOI

      10.2472/jsms.67.263

    • NAID

      130006386376

    • ISSN
      0514-5163, 1880-7488
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Atomistic modeling of the temperaute and loading rate dependent pop-in load in nanoindentation2020

    • Author(s)
      Shigenobu Ogata, Shuhei Shinzato, Yuji Sato, Takahito Ohmura
    • Organizer
      International Conference on Plasticity, Damage and Fracture (ICPDF) 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Multiscale modeling study of pop-ins in nanoindentation2019

    • Author(s)
      Shigenobu Ogata
    • Organizer
      Asia Pacific Congress on Computational Mechanics (APCOM) 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Atomistic prediction of the temperature- and loading-rate-dependent pop-in load in nanoindentation2019

    • Author(s)
      Shigenobu Ogata, Yuji Sato, Takahito Ohmura and Shuhei Shinzato
    • Organizer
      The 4th International Symposium on Atomistic and Multiscale Modeling of Mechanics and Multiphysics (ISAM4-2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Atomistic prediction of temperature‐ and loading‐rate‐dependent pop‐in load of nanoindentation2019

    • Author(s)
      Shigenobu Ogata
    • Organizer
      13th International Conference on the Mechanical Behavior of Materials (ICM13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling of pop-ins in nanoindentation2019

    • Author(s)
      Shigenobu Ogata, Takahito Ohmura, Yuji Sato, Shuhei Shinzato
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Cuナノワイヤの繰り返し荷重下での変形挙動の分子動力学解析2019

    • Author(s)
      荒賀玲司, 佐藤悠治, 石井明男, 君塚肇, 尾方成信
    • Organizer
      日本機械学会関西学生会2018年度学生卒業研究発表講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Hydrogen and dislocation assisted grain boundary crack initiation ~ A molecular dynamics study ~2019

    • Author(s)
      Shigenobu Ogata
    • Organizer
      International Conference on Plasticity, Damage, and Fracture 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Modeling of Deformation and Strength of Structural Materials”, International Seminar series on Time Dependent Multiscale Phenomena of Materials2018

    • Author(s)
      Shigenobu Ogata
    • Organizer
      International Seminar series on Time Dependent Multiscale Phenomena of Materials
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Predictive Multiscale Modeling of Deformation and Strength of Structural Materials2017

    • Author(s)
      Shigenobu Ogata
    • Organizer
      IUMRS-ICA 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Predictive Multiscale Modeling of Deformation and Strength of Nanostructured Structural Materials2017

    • Author(s)
      Shigenobu Ogata
    • Organizer
      The 9th Conference of Asian Consortium of Computational Materials Science (ACCMS)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 離散転位動力学法を用いた繰返し荷重下での転位組織の形成に関する研究2017

    • Author(s)
      福島秀,石井明男,尾方成信
    • Organizer
      日本機械学会 M&M2017材料力学カンファレンス
    • Related Report
      2017 Research-status Report

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Published: 2017-07-21   Modified: 2021-02-19  

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