WEIGHT-FUNCTIONS FOR A SURFACE SEMIELLIPTIC CRACK IN A FINITE THICKNESS PLATE

被引：136
作者：
SHEN, G
GLINKA, G
机构：
[1] Department of Mechanical Engineering, University of Waterloo, Waterloo
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 1991年 / 15卷 / 03期
关键词：
D O I：
10.1016/0167-8442(91)90023-D
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Weight functions for the surface and the deepest point of a semi-elliptical crack in a finite thickness plate were derived from a general weight function and two reference stress intensity factors. The weight functions were validated against finite element data by comparison of stress intensity factors calculated for several linear and non-linear stress fields. Differences were less than 2% for the surface point and 5% for the deepest point. The final weight functions are given in closed forms suitable for computer numerical integration. The weight functions appear to be particularly suitable for fatigue crack growth prediction of semi-elliptical cracks and fracture analysis of such cracks in complex stress fields.
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页码：247 / 255
页数：9
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