A modified zigzag approach to approximate moving crack front with arbitrary shape

被引：9

作者：

Liu, Yan-Ping ^{[1
]}

Chen, Chuan-Yao ^{[1
]}

Li, Guo-Qing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Civil Engn & Mech, Wuhan 430074, Hubei, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2011年 / 78卷 / 02期

关键词：

Virtual crack closure technique; Strain energy release rate; Finite element method; Zigzag mesh pattern; Fatigue crack growth; STRESS-INTENSITY FACTORS; RELEASE RATE CALCULATION; CLOSURE TECHNIQUE; DELAMINATION FRONT; GROWTH ANALYSIS; KINKING CRACKS; FATIGUE GROWTH;

D O I：

10.1016/j.engfracmech.2010.08.007

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper proposed a modified zigzag approach to approximate crack front with arbitrary shape based on virtual crack closure-integral technique. The important features of this approach are that: (i) more detailed consideration to determine the required virtually closed area and displacement opening were presented and (ii) adaptive re-meshing technique was avoid in studying crack growth. Three cases were presented to assess the validity of this approach by comparison to the results obtained from other approaches. Reasonable agreement between the present study and the analytical solutions were obtained. Also, the shape changes during crack propagation can be tracked with ease. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：234 / 251

页数：18

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