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

Hyungyil Lee, Yun-Jae Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)231-243
Number of pages13
JournalInternational Journal of Fracture
Volume143
Issue number3
DOIs
Publication statusPublished - 2007 Feb 1

Fingerprint

Interfacial Crack
J-integral
Bimaterial
Crack Tip
Hardening
Crack tips
Plastics
Crack-tip Field
Stress Field
T-stress
Stress Constraints
Plane Strain
Slip
Boundary Layer
Boundary layers
Finite Element
Formulation
Line

Keywords

  • Bi-material
  • Biaxiality
  • Constraint
  • FEM
  • Full specimen
  • J-integral
  • Modified boundary layer formulation
  • Plastic hardening mismatch
  • Slip-line field
  • T-stress

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials

Cite this

Interfacial crack-tip constraints and J-integral for bi-materials with plastic hardening mismatch. / Lee, Hyungyil; Kim, Yun-Jae.

In: International Journal of Fracture, Vol. 143, No. 3, 01.02.2007, p. 231-243.

Research output: Contribution to journalArticle

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