期刊
ENGINEERING FRACTURE MECHANICS
卷 75, 期 15, 页码 4450-4465出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2008.04.021
关键词
creep crack growth; finite element analysis; mixed-mode fracture; viscoelastic media; orthotropic materials
类别
This paper deals with a new independent path integral which provides the mixed-mode during a creep crack growth process in viscoelastic orthotropic media. The developments are based on an energetic approach using conservative laws. The mixed-mode fracture separation is introduced according to the generalization of the virtual work principle. The fracture algorithm is implemented in a finite element software and coupled with an incremental viscoelastic formulation and an automatic crack growth simulation. This M-integral provides the Computation of stress intensity factors and energy release rate for each fracture mode. A numerical validation, in terms of energy release rate and stress intensity factors. is Carried out on a CTS specimen under mixed-mode loading for different crack growth speeds. (C) 2008 Elsevier Ltd. All rights reserved.
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