Numerical methods for determination of stress intensity factors of singular stress field

被引：42
|
作者：
Liu, Yihua [1 ]
Wu, Zhigen [1 ]
Liang, Yongcheng [2 ]
Liu, Xiaomei [3 ]
机构：
[1] Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Peoples R China
[2] Shanghai Fisheries Univ, Coll Engn Sci & Technol, Shanghai 200090, Peoples R China
[3] Shanghai Univ Engn Sci, Coll Fundamental Studies, Shanghai 201620, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2008年 / 75卷 / 16期
关键词：
Numerical method; Stress singularity; Stress intensity factor; Least square method; Finite element method;
D O I：
10.1016/j.engfracmech.2008.06.007
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The asymptotic solution of the singular stress held near a singular point is generally comprised of one or more singular terms in the form of Kr(lambda-1)f(ij)(0). Based on the asymptotic solution of the singular stress field and the common numerical solution (stresses or displacements) obtained by an ordinary tool such as the finite element method or boundary element method, a simple and effective numerical method is developed to calculate stress intensity factors for one and two singularities. Three examples show that the stress intensity factors evaluated using the method proposed in this paper are very accurate. (C) 2008 Published by Elsevier Ltd.
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页码：4793 / 4803
页数：11
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