Interfacial crack-tip constraints and J-integral for bi-materials with plastic hardening mismatch

Hyungyil Lee, Yun Jae Kim

研究成果: Article査読

11 被引用数 (Scopus)

抄録

This paper investigates interfacial crack tip stress fields and the J-integral for bi-materials with plastic hardening mismatch via detailed elastic-plastic finite element analyses. For small scale yielding, the modified boundary layer formulation with the elastic T-stress is employed. For fully plastic yielding, plane strain single-edge- cracked specimens under pure bending are considered. Interfacial crack tip stress fields are explained by modified Prandtl slip-line fields. It is found that, for bi-materials consisting of two elastic-plastic materials, increasing plastic hardening mismatch increases both crack-tip stress constraint in the lower hardening material and the J-contribution there. The implication of asymmetric J-integral in bi-materials is also discussed.

本文言語English
ページ(範囲)231-243
ページ数13
ジャーナルInternational Journal of Fracture
143
3
DOI
出版ステータスPublished - 2007 2
外部発表はい

ASJC Scopus subject areas

  • Computational Mechanics
  • Modelling and Simulation
  • Mechanics of Materials

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