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Realization of fast large-scale parallel welding mechanics analysis using nonlinear domain decomposition method

Research Project

Project/Area Number 19K14871
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18030:Design engineering-related
Research InstitutionThe University of Electro-Communications

Principal Investigator

Yusa Yasunori  電気通信大学, 大学院情報理工学研究科, 助教 (70756395)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords並列有限要素法 / 領域分割法 / 非線形有限要素法 / 熱弾塑性解析 / 大変形弾塑性解析 / 溶接 / 金属積層造形 / 重合メッシュ法 / パラメトリック解析 / 溶接力学 / アディティブマニュファクチャリング / 並列計算 / 計算溶接力学 / 有限要素法 / 高性能計算
Outline of Research at the Start

溶接変形や溶接残留応力を最小化する溶接施工条件最適化のためには、溶接継手周辺に留まらない複雑な構造全体を考慮した高精度な大規模溶接解析が必要である。本研究は、溶接解析に特化した分散メモリ型並列非線形有限要素法解析手法を提案することによって、複雑形状溶接構造物の高速な大規模溶接解析を実現するものである。また、溶接解析に特化した大規模非線形有限要素法解析手法を加工、成形、破壊、損傷などの各種の非線形有限要素法解析へ水平展開することによって、大規模非線形有限要素法のあるべき姿を横断的に提案するものである。

Outline of Final Research Achievements

A parallel nonlinear finite element analysis method for welding problems and metal additive manufacturing problems were proposed. In the welding and metal additive manufacturing analyses, zero-stiffness finite elements are placed in advance at the portion to be welded. An implementation method that considers the zero-stiffness finite elements appropriately in the domain decomposition method was developed. The proposed implementation method was also applied to damage analysis and topology computation. Furthermore, a framework of fast parallel large-deformation elastic-plastic analysis was developed. Using quasi-Newton-based nonlinear finite element methods, which were studied extensively in the 1970s and the 1980s, an analysis framework that is based on an implementation method for present distributed-memory parallel computers and on a modern large-deformation elastic-plastic material model was proposed.

Academic Significance and Societal Importance of the Research Achievements

溶接問題、金属積層造形問題など、機械の製造時の複雑な力学挙動を従来よりも短い計算時間で解析できるようになり、過度に安全側でない合理的な設計に貢献できる可能性がある。また、破壊時などの他の力学挙動に対しても適用できるような解析技術を提案したため、合理的な保守などにも貢献できる可能性がある。また、領域分割法は実際にスーパーコンピュータで使用されている基盤的な解析手法であるため、本研究成果によって、スーパーコンピュータを用いた複雑な力学挙動の解析の発展が期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 7 results)

  • [Journal Article] Implementation of balancing domain decomposition method for parallel finite element analysis involving inactive elements2022

    • Author(s)
      Yasunori Yusa, Hiroaki Kobayashi, Yuma Murakami, Hiroshi Okada
    • Journal Title

      International Journal for Numerical Methods in Engineering

      Volume: in press Issue: 17 Pages: 3974-4000

    • DOI

      10.1002/nme.6995

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Performance investigation of quasi-Newton-based parallel nonlinear FEM for large-deformation elastic-plastic analysis over 100 thousand degrees of freedom2021

    • Author(s)
      Yasunori Yusa, Shota Miyauchi, Hiroshi Okada
    • Journal Title

      Mechanical Engineering Journal

      Volume: 8 Issue: 3 Pages: 21-00053-21-00053

    • DOI

      10.1299/mej.21-00053

    • NAID

      130008052726

    • ISSN
      2187-9745
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Development of parallel parametric analysis system using coupling-matrix-free iterative s-version FEM for design of structure with a hole2022

    • Author(s)
      Hiroki Suwa, Yasunori Yusa
    • Organizer
      15th World Congress on Computational Mechanics and 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Implementation of balancing domain decomposition method for inactive elements and its applications2022

    • Author(s)
      Yasunori Yusa, Hiroaki Kobayashi, Yuma Murakami, Hiroshi Okada
    • Organizer
      15th World Congress on Computational Mechanics and 8th Asian Pacific Congress on Computational Mechanics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大規模有限要素法を用いた金属積層造形問題解析と実験の比較(造形サンプルの反り変形の予測と評価)2022

    • Author(s)
      村上卓, 岡田裕, 小林宏晃, 遊佐泰紀
    • Organizer
      第 27 回計算工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 領域分割法と簡略化熱源モデルを用いた金属積層造形解析の検討2022

    • Author(s)
      遊佐泰紀, 大角俊太, 小林宏晃, 岡田裕
    • Organizer
      第 27 回計算工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] バランシング領域分割法へのインアクティブ要素の実装と金属積層造形シミュレーションへの適用2021

    • Author(s)
      遊佐泰紀, 小林宏晃, 村上悠真, 岡田裕
    • Organizer
      日本機械学会第 34 回計算力学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fracture mechanics evaluation of V-bending die with a hole using parametric analysis system with coupling-matrix-free iterative s-version FEM2021

    • Author(s)
      Hiroki Suwa, Yasunori Yusa
    • Organizer
      XVI International Conference on Computational Plasticity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Performance investigation of quasi-Newton-based parallel large-deformation elastic-plastic analysis of crack problems2021

    • Author(s)
      Yasunori Yusa, Shota Miyauchi, Hiroshi Okada
    • Organizer
      XVI International Conference on Computational Plasticity
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 反復型重合メッシュ法を用いた孔を有する V 曲げ加工用金型のパラメトリック解析および破壊力学評価2021

    • Author(s)
      諏訪浩貴, 遊佐泰紀
    • Organizer
      第 26 回計算工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Study on an analysis methodology for metal additive manufacturing process using a large scale parallel finite element computation2020

    • Author(s)
      Hiroaki Kobayashi, Yuma Murakami, Yasunori Yusa, Hiroshi Okada
    • Organizer
      11th International Conference on Computational Methods
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Large-scale parallel thermal elastic-plastic welding simulation using balancing domain decomposition method2019

    • Author(s)
      Yasunori Yusa, Yuma Murakami, Hiroshi Okada
    • Organizer
      ASME 2019 Pressure Vessels and Piping Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Parallel thermal elastic-plastic simulation by domain decomposition method using PC cluster (application to additive manufacturing)2019

    • Author(s)
      Yuma Murakami, Yasunori Yusa, Hiroshi Okada
    • Organizer
      7th Asia Pacific Congress on Computational Mechanics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 準 Newton 法に基づく高速な大変形弾塑性解析の研究2019

    • Author(s)
      遊佐泰紀, 宮内彰太, 岡田裕
    • Organizer
      第 24 回計算工学講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 領域分割法を用いたマルチパス溶接シミュレーションの検討2019

    • Author(s)
      遊佐泰紀, 村上悠真, 岡田裕
    • Organizer
      日本機械学会第 32 回計算力学講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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