Elastic-plastic analysis of a crack parallel to the interface

✍ Scribed by Bing Liu; Hidetoshi Kimoto; Hiroshi Kitagawa

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 804 KB
• Volume: 53
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(95)00196-4

✦ Synopsis

paper considers the plane strain problem of an elastic-plastic metal and an elastic substrate composite media under external normal loading. The elastic-plastic metal contains a crack lying parallel to, and at a small given distance from, the interface. The elastic-plastic numerical analysis for the crack is performed using a large deformation elastic-plastic finite element method based on the phenomenological J2-flow theory with power-law strain hardening. The characteristics of the elastic-plastic fields at the crack tip are investigated and the similarities to the related available solutions are discussed. Authors also propose that a so-called sub-interface parameter defined by Hutchinson et al.

[crack paralleling an interface between dissimilar materials. J. appl. Mech. 54, 828-832 (1987).] can be used to evaluate the mode mixity at the crack tip.