A theoretical note on mode-I crack branching and kinking

被引：27
|
作者：
Xie, Y. J. [1 ,2 ]
Hu, X. Z. [2 ]
Wang, X. H. [1 ]
Chen, J. [1 ]
Lee, K. Y. [3 ]
机构：
[1] Liaoning Shihua Univ, Dept Mech Engn, Fushun 113001, LN, Peoples R China
[2] Univ Western Australia, Sch Mech Engn, Perth, WA 6009, Australia
[3] Yonsei Univ, Sch Mech Engn, Seoul 120749, South Korea
来源：
ENGINEERING FRACTURE MECHANICS | 2011年 / 78卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Crack kinking; Crack branching; Crack-branching toughness; J-Integral; Mixed-mode crack growth; FRACTURE;
D O I：
10.1016/j.engfracmech.2011.01.023
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
An energy-based fracture mode has been derived for the mode-I crack branching and kinking. The classic J(I)-integral has been further explored by a new partial integral path and the analytical solution of the energy release rate for crack branching and kinking from a mode-I crack tip has been established. The crack branching/kinking angle has also been analytically derived. It shows that the Griffith's theorem and conservation law can be applied to both mode-I crack extension and mode-I crack branching and kinking. The branching mechanism for quasi-static mode-I crack has been theoretically investigated. The branching toughness and the K-based criterion for crack branching have been defined. The crack branching phenomena predicted by the present model are in well agreement with the experimental observations reported in the literatures. (C) 2011 Published by Elsevier Ltd.
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页码：919 / 929
页数：11
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