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Study on the Method of Structural Analysis Considering Material Damage and Fracture

Research Project

Project/Area Number 11650951
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 海洋工学
Research InstitutionUniversity of Tokyo

Principal Investigator

TOI Yutaka  University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (40133087)

Co-Investigator(Kenkyū-buntansha) LEE Jeoung-gwen  University of Tokyo, Institute of Industrical Science, Research, 生産技術研究所, 助手 (40302624)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥3,200,000 (Direct Cost: ¥3,200,000)
KeywordsFramed Structures / 3-D Structures / Material Damame / Finite Element Method / Structural Analysis / Material Fracture / Plasticity / Thermal Elasticity / 海洋構造物 / 船体構造 / 連続体損傷力学 / 損傷 / 破壊 / 亀裂
Research Abstract

The stress distribution, deformation and the ultimate strength are analyzed in the conventional structural analysis of ship and offshore structures. However, the material damage and fracture such as fatigue and cracking play an important role in actual accidents such as striking, collision and overturning. The consideration of material damage and fracture in the commercial finite element codes is insufficient in comparison with the material and geometrical nonlinearity. The method of limit strength analysis of structures composed of new alloys, plastics, ceramics, concrete and ice as well as steels is required in the field of ship and offshore engineering.
The basic study to establish the method of nonlinear structural analysis based on continuum damage mechanics is conducted in the present study. The main results of the present study are (1) the development of the thermal elasto-plastic damage analysis of structural members under thermal loading and its validation, (2) the development … More of the method of computational material testing of pre-damaged steels and its validation. In (1), the cracking behavior due to zinc-embrittlement of bridge girders and pylon members in hot-dip galvanization has been analyzed by the finite element method using damage mechanics models to solve the phenomena from a mechanics point of view. The damage analysis has also been conducted for the functionally graded material disks subjected to thermal shock and cycles in order to point out its validity in material design. In (2), the dynamic tensile behavior of pre-damaged (pre-fatigued or pre-strained) steels has been simulated, using the damage mechanics models identified by the static/dynamic tensile tests and the fatigue SN-curves to show the possibility of computational alternatives for the material testing of pre-damaged steels. Both are the advancement to new fields of computational solid mechanics and can be considered as the first steps for the development of the method of structural analysis considering material damage and fracture. Less

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 都井裕,李帝明: "溶融亜鉛めっき時における送電鉄塔部材の熱弾塑性損傷解析"日本機械学会論文集(A). 第65巻、第632号. 723-730 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 都井裕,李帝明: "溶融亜鉛めっき時の構造部材の三次元損傷解析"日本機械学会論文集(A). 第66巻、第643号. 618-625 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 李帝明,都井裕: "熱衝撃・熱サイクルを受ける傾斜機能ディスクの弾塑性損傷解析"日本機械学会論文集(A). 第67巻、第655号(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 都井裕,山崎伸也: "連続体損傷力学モデルによる予損傷鋼材の数値材料試験"日本機械学会論文集(A). 第67巻、第655号(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yutaka Toi and Jae-Myung Lee: "Thermal Elasto-Plastic Damage Analysis of Pylon Members in Hot-Dip Galvanization"Transactions of the Japan Society of Mechanical Engineers. Vol.65, No.632. 723-730 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yutaka Toi and Jae-Myung Lee: "Three-Dimensional Damage Analysis of Structural Members Under Hot-Dip Galvanization"Transactions of the Japan Society of Mechanical Engineers. Vol.66, No.643. 618-625 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Jae-Myung Lee and Yutaka Toi: "Elasto-Plastic Damage Analysis of Functionally Graded Material Disks Subjected to Thermal Shock and Thermal Cycle"Transactions of the Japan Society of Mechanical Engineers. Vol.67, No.655(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yutaka Toi and Shinya Yamazaki: "Computational Material Testing of Pre-Damaged Steels by the Continuum Damage Mechanics Model"Transactions of the Japan Society of Mechanical Engineers. Vol.67, No.655(in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 都井裕,李帝明: "溶融亜鉛めっき時の構造部材の三次元損傷解析"日本機械学会論文集(A). 66巻643号. 618-625 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 都井裕,山崎伸也: "損傷力学モデルによるアルミニウム合金の低サイクルおよび高サイクル疲労シミュレーション"生産研究. 第52巻、第8号. 352-355 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yutaka Toi,Jae-Myung Lee: "Finite Element Damage Analysis of Structural Members in Hot-Dip Galvanization"Proceedings of the International Conference on Computational Engineering & Sciences. Vol.1. 1020-25 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 李帝明,都井裕: "熱荷重を受ける傾斜機能材料の損傷挙動の有限要素解析"第49回理論応用力学講演会講演論文集. 79-80 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 李帝明,都井裕: "傾斜機能材料の熱損傷過程の有限要素解析"計算工学講演会論文集. Vol.5. 737-740 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 都井裕: "材料損傷を考慮した構造物の非線形有限要素解析"機械の研究. 第52巻、第11号. 1-8 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 都井 裕、李 帝明: "溶融亜鉛めっき時における送電鉄塔部材の熱弾塑性損傷解析"日本機械学会論文集(A編). 65巻632号. 723-730 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yutaka Toi and Jae-Myung Lee: "Thermal Elasto-Viscoplastic Damage Analysis of Pylon Members in Hot-Dip Galvanization"Transactions of SMiRT-15. Vol.II. 245-252 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 李 帝明、都井 裕: "鋼材の高温損傷挙動の3次元有限要素解析"日本機械学会1999年度年次大会講演論文集(No.99-1). III. 31-32 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 李 帝明、都井 裕: "溶融亜鉛めっき中の送電鉄塔用山形鋼の熱弾塑性損傷解析"計算工学講演論文集. 4巻・2号. 769-772 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 都井 裕、李 帝明: "溶融亜鉛めっき時の構造部材の三次元損傷解析"日本機械学会論文集(A編). 66巻643号(印刷中). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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