AN INTERFACE CRACK BETWEEN AN ORTHOTROPIC THIN-FILM AND SUBSTRATE

Citation
Y. Xu et al., AN INTERFACE CRACK BETWEEN AN ORTHOTROPIC THIN-FILM AND SUBSTRATE, International journal of fracture, 63(4), 1993, pp. 369-381
Citations number
9
Categorie Soggetti
Mechanics
ISSN journal
03769429
Volume
63
Issue
4
Year of publication
1993
Pages
369 - 381
Database
ISI
SICI code
0376-9429(1993)63:4<369:AICBAO>2.0.ZU;2-Q
Abstract
This work is concerned with a semi-infinite interface crack between a thin film and a substrate. The two materials are assumed to be linearl y elastic and orthotropic. A solution is presented for the stress fiel d due to an edge dislocation on the interface which is valid for any c ombinations of material parameters. It is found that the behavior of s uch a bi-material system is governed by 6 independent material paramet ers. The stress intensity factor is computed for general edge loadings by solving integral equations numerically, and the size of the K-domi nant zone is also studied for a residually stressed thin film. The sit uations in which the K-field zone of dominance is very small are ident ified and discussed.