期刊
ENGINEERING FRACTURE MECHANICS
卷 77, 期 12, 页码 2316-2336出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2010.04.032
关键词
Stress intensity factor; Scaled boundary finite-element method; Interfacial crack; Stress singularity; V-notch; Composite
类别
资金
- Australian Research Council [DP0986534]
- Australian Research Council [DP0986534] Funding Source: Australian Research Council
This paper proposes a definition of generalized stress intensity factors that includes classical definitions for crack problems as special cases. Based on the semi-analytical solution obtained from the scaled boundary finite-element method, the singular stress field is expressed as a matrix power function with its dimension equal to the number of singular terms. Not only real and complex power singularities but also power-logarithmic singularities are represented in a unified expression without explicitly determining the type of singularity. The generalized stress intensity factors are evaluated directly from the scaled boundary finite-element solution for the singular stress field by following standard stress recovery procedures in the finite element method. The definition and evaluation procedure are valid to multi-material wedges composed of any number of isotropic and anisotropic materials. Numerical examples, including a cracked homogeneous plate, a bimaterial plate with an interfacial crack, a V-notched bimaterial plate and a crack terminating at a material interface, are analyzed. Features of this unified definition are discussed. (C) 2010 Elsevier Ltd. All rights reserved.
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