Modelling of the crack growth initiation in viscoelastic media by the Gθv-integral

被引：32
|
作者：
Dubois, F [1 ]
Petit, C [1 ]
机构：
[1] Univ Limoges, Ctr Univ Genie Civil, Lab Mech & Modelling Mat & Struct Civil Engn, MSCE3, F-19300 Egletons, France
来源：
ENGINEERING FRACTURE MECHANICS | 2005年 / 72卷 / 18期
关键词：
creep; fracture; viscoelasticity; finite element analysis; independent path integral; generalized Kelvin-Voigt model; energetic method;
D O I：
10.1016/j.engfracmech.2005.04.003
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this paper, the effects of viscoelastic characteristics on the creep crack growth initiation are studied by developing a new path-independent integral G theta(v), which allows us to compute the energy release rate with the finite element method. The originality of this approach is the perfect uncoupling between the viscous dissipation and the free energy which drives the crack propagation and the crack growth initiation. Coupled with an explicit finite element formulation of the linear viscoelastic behavior, this integral allows us to simulate accurate crack growth initiation. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2821 / 2836
页数：16
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