ELASTIC INTERACTIONS OF A FATIGUE-CRACK WITH A MICRODEFECT BY THE MIXED BOUNDARY INTEGRAL-EQUATION METHOD

被引：9

作者：

LUA, YJ ^{[1
]}

LIU, WK ^{[1
]}

BELYTSCHKO, T ^{[1
]}

机构：

[1] NORTHWESTERN UNIV,DEPT MECH ENGN,EVANSTON,IL 60208

来源：

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING | 1993年 / 36卷 / 16期

关键词：

D O I：

10.1002/nme.1620361605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the mixed boundary integral equation method is developed to study the elastic interactions of a fatigue crack and a micro-defect such as a void, a rigid inclusion or a transformation inclusion. The method of pseudo-tractions is employed to study the effect of a transformation inclusion. An enriched element which incorporates the mixed-mode stress intensity factors is applied to characterize the singularity at a moving crack tip. In order to evaluate the accuracy of the numerical procedure, the analysis of a crack emanating from a circular hole in a finite plate is performed and the results are compared with the available numerical solution. The effects of various micro-defects on the crack path and fatigue life are investigated. The results agree with the experimental observations.

引用

页码：2743 / 2759

页数：17

共 24 条

[21] STRESS-FRINGE SIGNATURES FOR PROPAGATING CRACKS [J].