Calculation of mixed-mode stress intensity factors for a crack normal to a bimaterial interface using contour integrals

J. H. Chang, D. J. Wu

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A pair of contour integrals J are proposed in this paper. The integrals are shown to be path-independent in a modified sense and so they can be accurately evaluated without using any particular singular finite elements. Also, the relationship between J and the generalized stress intensity factors (SIFs) is analytically derived and expressed as functions of the bimaterial mechanical constants. Once the J-integrals are accurately computed, the generalized SIFs and, consequently, the asymptotic mixed-mode stress field can then be properly determined. Numerical results in this study show that the contribution from mode II stress component appears to be more dominant when the uncracked material is relatively stiffer, and vice versa.

Original languageEnglish
Pages (from-to)1675-1695
Number of pages21
JournalEngineering Fracture Mechanics
Volume70
Issue number13
DOIs
StatePublished - Sep 2003

Keywords

  • Crack normal to bimaterial interface
  • Generalized SIFs
  • J-integrals
  • M-integral
  • Mixed-mode stresses
  • Modified path-independence

Fingerprint

Dive into the research topics of 'Calculation of mixed-mode stress intensity factors for a crack normal to a bimaterial interface using contour integrals'. Together they form a unique fingerprint.

Cite this