Near-tip behavior of ductile, steady-state crack growth in a hydrogen charged material

R. H. Dodds, J. C. Sobotka, P. Sofronis

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

This study examines the influence of increased dislocation velocity due to hydrogen on the steady-state behavior of a crack propagating under quasi-static conditions in elastic-plastic, matched, over-matched, and under-matched weld materials. Finite element analyses in a small-scale yield setting with plane strain conditions resolve the near-tip fields under the remotely applied K I - T displacement fields. The constitutive model incorporates hydrogen induced dilation and softening effects on the inelastic behavior of the ductile material representative of a pressure vessel steel. Near the crack tip, the hydrogen concentration, triaxiality, and plastic strain depend on the remote loading, the extent of material softening, and the initial concentration of hydrogen in the weld and base metal. A simple measure of damage along the uncracked ligament predicts higher values of ductile void growth in the presence of hydrogen and implies lower resistance to crack advancement.

本文言語英語
ホスト出版物のタイトル12th International Conference on Fracture 2009, ICF-12
ページ1148-1157
ページ数10
出版ステータス出版済み - 12 1 2009
外部発表はい
イベント12th International Conference on Fracture 2009, ICF-12 - Ottawa, ON, カナダ
継続期間: 7 12 20097 17 2009

出版物シリーズ

名前12th International Conference on Fracture 2009, ICF-12
2

その他

その他12th International Conference on Fracture 2009, ICF-12
Countryカナダ
CityOttawa, ON
Period7/12/097/17/09

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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