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Establishment of mechanical modeling process of nonuniform deformation and development of deformation concentration-reduced material

Research Project

Project/Area Number 18K03844
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18010:Mechanics of materials and materials-related
Research InstitutionOsaka City University

Principal Investigator

Uchida Makoto  大阪市立大学, 大学院工学研究科, 准教授 (90432624)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords不均一変形 / 不均質構造 / DIC / FEM / 均質化法 / ひずみこう配 / 非局所 / 寸法依存性 / 微視構造 / デジタル画像相関法 / 応力こう配 / 2次均質化法 / 非局所連続体 / 2次均質化法 / 3Dプリンタ
Outline of Final Research Achievements

Engineering materials typically have a heterogeneous microstructure. When the size difference between micro and macrostructure is small, the interaction of nonuniform deformation in both scales induces the size effect. In this study, the direct mechanical modeling process of the non-uniform deformation characterized by the material microstructure with a finite size is established using the quantitatively evaluated strain fields. It will contribute the development of the engineering material suppressing the deformation concentration.
Experimental and numerical studies on the tensile test of polycrystalline specimens having a curved gage section were performed to discuss the interaction between micro and macroscopic non-uniform deformation. From the series of the obtained results, we proposed the nonlocal mechanical model, which can represent size-dependent non-uniform deformation, using the plastic compliance gradient and stress field for the finite region of the heterogeneous material.

Academic Significance and Societal Importance of the Research Achievements

材料の損傷の前駆現象である変形集中を抑制することは工業製品の安全性を高める上で極めて効果的である.有限要素法を用いれば,材料の応力ひずみ関係から連続体スケールの不均一変形を予測することが可能になるが,製品寸法が微小になるほど,材料の微視構造が製品の変形状態に影響することによって予測精度が低下する.本研究では,そのような材料の微視構造が誘発する不均一変形を実験から定量化し,それを予測可能なモデルを提案した.本研究により鰓得た一連の成果は,材料の不均一変形の予測精度を改善するとともに,変形集中抑制を実現可能な材料開発に貢献するものと確信している.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (25 results)

All 2021 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (20 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Numerical Analyses of Non-Uniform Deformation during Plane Strain Compression of Polycrystalline Material Using Second-Order Homogenization Method2019

    • Author(s)
      阪本 真士, 大塚 貴之, 内田 真
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 68 Issue: 11 Pages: 839-844

    • DOI

      10.2472/jsms.68.839

    • NAID

      130007748602

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2019-11-15
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nonlocal Multiscale Modeling of Deformation Behavior of Polycrystalline Copper by Second-Order Homogenization Method2019

    • Author(s)
      Makoto Uchida and Yoshihisa Kaneko
    • Journal Title

      The European Physical Journal B

      Volume: 92 Issue: 9 Pages: 189

    • DOI

      10.1140/epjb/e2019-100231-4

    • NAID

      120006891640

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020518

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of Effect of Sample Size and Layer Direction on Mechanical Property of Specimen Manufactured by FDM-Type 3D Printer2019

    • Author(s)
      Akiyama Hiroyuki、Uchida Makoto、Kaneko Yoshihisa
    • Journal Title

      Key Engineering Materials

      Volume: 794 Pages: 324-332

    • DOI

      10.4028/www.scientific.net/kem.794.324

    • Related Report
      2018 Research-status Report
  • [Journal Article] Macroscopic and Microscopic Non-Uniform Deformations of Polycrystalline Pure Copper during Uniaxial Tensile Test with High Stress Gradient2019

    • Author(s)
      Taniguchi Akito、Maeyama Takatoshi、Uchida Makoto、Kaneko Yoshihisa
    • Journal Title

      Key Engineering Materials

      Volume: 794 Pages: 246-252

    • DOI

      10.4028/www.scientific.net/kem.794.246

    • Related Report
      2018 Research-status Report
  • [Journal Article] Experimental modeling of nonuniform deformation in finite volume evaluation region of heterogeneous material2018

    • Author(s)
      Uchida Makoto、Kaneko Yoshihisa
    • Journal Title

      Heliyon

      Volume: 4 Issue: 4 Pages: e00578-e00578

    • DOI

      10.1016/j.heliyon.2018.e00578

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 周期的に磁石を配列させた模型材料を用い た引張変形挙動に及ぼすサイズ効果の検 討2021

    • Author(s)
      三田悠平,内田真,兼子佳久
    • Organizer
      日本機械学会関西支部第96期定時総会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 4点曲げ試験における多結晶純銅の不均一 な塑性変形に及ぼす試験片寸法の影響の 評価2021

    • Author(s)
      堤健将,内田真,兼子佳久,中谷亮太
    • Organizer
      日本機械学会関西支部第96期定時総会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 多結晶純金属の微視および巨視的な不均一変形を評価するための非局所弾塑性構成式の定式化2021

    • Author(s)
      内田真,堤健将,兼子佳久,阪本真士
    • Organizer
      第70期日本材料学会学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 2 次均質化法を用いた多結晶材料の変形における寸法依存性評価2020

    • Author(s)
      阪本真士, 大塚貴之, 内田真
    • Organizer
      第69期日本材料学会学術講演会(新型コロナのため学会中止,講演原稿のみ公表)
    • Related Report
      2020 Annual Research Report
  • [Presentation] 粗大結晶粒を有する純銅の曲げ変形に及ぼす試験片寸法の影響の評価2020

    • Author(s)
      堤健将, 内田真, 兼子佳久
    • Organizer
      第69期日本材料学会学術講演会(新型コロナのため学会中止,講演原稿のみ公表)
    • Related Report
      2020 Annual Research Report
  • [Presentation] 磁石を用いた周期的微視構造を有する模型材料の変形 挙動の評価2020

    • Author(s)
      三田悠平,内田真,兼子佳久
    • Organizer
      第69期日本材料学会学術講演会(新型コロナのため学会中止,講演原稿のみ公表)
    • Related Report
      2020 Annual Research Report
  • [Presentation] データ同化を用いた熱可塑性樹脂の時間依存性挙動の予測2020

    • Author(s)
      林智也,内田 真,兼子佳久
    • Organizer
      第6回材料WEEK 材料シンポジウムワークショップ
    • Related Report
      2020 Annual Research Report
  • [Presentation] 3Dプリンタで成形したハニカム周期構造はりの4点曲げ試験における力学的特性の評価2020

    • Author(s)
      八瀬奨之, 兼子佳久, 内田真
    • Organizer
      日本機械学会関西支部第95期定時総会講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] データ同化解析によるPPおよびPAに生じる不均一変形予測に関する検討2020

    • Author(s)
      林智也, 内田真, 兼子佳久
    • Organizer
      日本機械学会関西支部第95期定時総会講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Numerical Analyses of Micro- to Macroscopic non-Uniform Deformation During Plane Strain Compression Using Second-Order Homogenization Method2019

    • Author(s)
      M. Sakamoto, T. Otsuka and M. Uchida
    • Organizer
      International Conference on Computational Plasticity 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2 次均質化法を用いた多結晶体の平面ひずみ圧縮変形における寸法効果の解析評価2019

    • Author(s)
      阪本真士, 大塚貴之, 内田真
    • Organizer
      日本塑性加工学会第70回塑性加工連合講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多結晶材料の巨視的なひずみ場の数値解析による予測手法の検討2019

    • Author(s)
      内田真, 前山貴俊, 兼子佳久
    • Organizer
      日本機械学会M&M2018材料力学部門講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 巨視ひずみ勾配を受ける多結晶純銅の力学的応答に及ぼす試験片寸法の影響の実験的評価2019

    • Author(s)
      前山貴俊, 内田真, 兼子佳久
    • Organizer
      日本機械学会M&M2018材料力学部門講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 2次均質化法を用いた多結晶体の平面ひずみ圧縮変形における寸法依存性の解析評価2019

    • Author(s)
      阪本真士, 大塚貴之, 内田真
    • Organizer
      日本鉄鋼協会生産技術部門第151回圧延理論部会
    • Related Report
      2019 Research-status Report
  • [Presentation] 多結晶純銅の微視的不均一変形に及ぼす巨視ひずみ勾配の影響の評価2019

    • Author(s)
      前山貴俊, 谷口亮仁, 内田真, 兼子佳久
    • Organizer
      日本機械学会関西支部第94期定時総会講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 応力こう配を有する多結晶純銅試験片の引張試験における微視および巨視領域における不均一変形2018

    • Author(s)
      内田真, 谷口亮仁, 前山貴俊, 兼子佳久
    • Organizer
      第67期日本材料学会学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 巨視的ひずみ勾配を受ける多結晶純銅の微視的不均一変形の評価2018

    • Author(s)
      前山貴俊, 内田真, 兼子佳久
    • Organizer
      日本実験力学会 2018年度年次講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Nonlocal multiscale modeling of deformation behavior of polycrystalline copper by second-order homogenization method2018

    • Author(s)
      Makoto Uchida, Akito Taniguchi, Yosihisa Kaneko
    • Organizer
      The 9th International Conference on Multiscale Materials Modeling
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Macroscopic and Microscopic Nonuniform Deformation of Polycrystalline Pure Copper during Uniaxial Tensile Test with High Stress Gradient2018

    • Author(s)
      Akito Taniguchi, Takatoshi Maeyama, Makoto Uchida, Yoshihisa Kaneko
    • Organizer
      The 14th Asia-Pacific Symposium on Engineering Plasticity and its Applications
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Effect of Sample Size and Layer Direction on Mechanical Property of Specimen Manufactured by FDMtype 3D Printer2018

    • Author(s)
      Hiroyuki Akiyama, Makoto Uchida, Yoshihisa Kaneko
    • Organizer
      The 14th Asia-Pacific Symposium on Engineering Plasticity and its Applications
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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