ANALYSIS ON THE COHESIVE STRESS AT HALF INFINITE CRACK TIP

被引：0
|
作者：
王利民
徐世烺
机构：
[1] Department of Civil Engineering, Dalian University of Technology,Dalian 116024, P.R.China ,Department of Civil Engineering, Dalian University of Technology,Dalian 116024, P.R.China
[2] Mechanics Department, Shandong University of Technology,Zibo, Shandong 255012, P.R.China
来源：
AppliedMathematicsandMechanics(EnglishEdition) | 2003年 / 08期
基金：
中国国家自然科学基金;
关键词：
quasi-brittle material; crack cohesive force; integral equation; method of least squares; integral transformation method; algebra equation;
D O I：
暂无
中图分类号：
O346.1 [断裂理论];
学科分类号：
080102 ;
摘要：
The nonlinear fracture behavior of quasi-brittle materials is closely related with the cohesive force distribution of fracture process zone at crack tip. Based on fracture character of quasi-brittle materials, a mechanical analysis model of half infinite crack with cohesive stress is presented. A pair of integral equations is established according to the superposition principle of crack opening displacement in solids, and the fictitious adhesive stress is unknown function . The properties of integral equations are analyzed, and the series function expression of cohesive stress is certified. By means of the data of actual crack opening displacement, two approaches to gain the cohesive stress distribution are proposed through resolving algebra equation. They are the integral transformation method for continuous displacement of actual crack opening, and the least square method for the discrete data of crack opening displacement. The calculation examples of two approaches and associated discussions are give
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页码：917 / 927
页数：11
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