Improvement of fatigue crack growth simulation based on the strip yield model considering the strain hardening effect of materials

Koji Gotoh, Keisuke Harada

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

This paper presents an improved numerical simulation procedure for fatigue crack growth based on the strip yield model with a weight function. In the previous numerical model, one-dimensional bar elements plugged up the chink corresponding to the virtual crack opening displacement in the plastic zone to describe the crack wake over fatigue crack surfaces. However, this numerical simulation method gives poor growth estimations under large variable loading histories, e.g. spike overloading. It is possible that insufficient consideration of the strain hardening effect of materials leads to excess crack closure. The authors develop the numerical simulation model of fatigue crack growth by considering the strain hardening effect of materials using the modified strip yield model. Numerical simulations of fatigue crack growth under many types of loading are performed to investigate the validity of our new proposed model. Comparison of proposed simulation results with previous results and with experimental measurements confirms the superiority of the proposed method.

本文言語英語
ホスト出版物のタイトルASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
ページ187-194
ページ数8
DOI
出版ステータス出版済み - 12月 1 2012
イベントASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012 - Rio de Janeiro, ブラジル
継続期間: 7月 1 20127月 6 2012

出版物シリーズ

名前Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
6

その他

その他ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2012
国/地域ブラジル
CityRio de Janeiro
Period7/1/127/6/12

!!!All Science Journal Classification (ASJC) codes

  • 海洋工学
  • エネルギー工学および電力技術
  • 機械工学

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