A self-similar crack expansion method for three-dimensional cracks in an infinite or semi-infinite medium

被引：0
|
作者：
Xu, YL [1 ]
Moran, B [1 ]
Belytschko, T [1 ]
机构：
[1] NORTHEASTERN UNIV,DEPT CIVIL ENGN,EVANSTON,IL 60208
来源：
ACTA MECHANICA SOLIDA SINICA | 1996年 / 9卷 / 03期
关键词：
self-similar crack expansion; stress intensity; crack extension method; 3-D cracks;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Self-Similar Crack Expansion (SSCE) method is used to calculate stress intensity factors for three-dimensional cracks in an infinite medium or semi-infinite medium by the boundary integral element technique, whereby, the stress intensity factors at crack tips are determined by calculating the crack-opening displacements over the crack surface. For elements on the crack surface, regular integrals and singular integrals are precisely evaluated based on closed form expressions, which improves the accuracy. Examples shaw that this method yields very accurate results for stress intensity factors of penny-shaped cracks and elliptical cracks in the full space, with errors of less than 1% as compared with analytical solutions. The stress intensity factors of subsurface cracks ate in good agreement with other analytical solutions.
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页码：217 / 235
页数：19
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