THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION

Applied Mathematics and Mechanics (English Edition) ›› 2001, Vol. 22 ›› Issue (11): 1344-1351.

THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION

钟明, 张永元

Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200030, P.R.China

收稿日期:1999-10-09 修回日期:2001-03-20 出版日期:2001-11-18 发布日期:2001-11-18
通讯作者: TANG Ren-ji

THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION

ZHONG Ming, ZHANG Yong-yuan

Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200030, P.R.China

Received:1999-10-09 Revised:2001-03-20 Online:2001-11-18 Published:2001-11-18

摘要/Abstract

摘要： The time-domain BEM was developed to analyze the dynamic stress intensity factor (DSIF) of 3-D elastodynamic crack problems. To simulate the stress singularity along the front of a crack, eight-node isoparametric singular elements were used, and the DSIF for a semi-circular surface crack was firstly calculated based on displacement equation using the time-domain BEM formulation. The new scheme to determine the time step was brought forward. By the dynamic analysis program of time-domain BEM compiled by us, several numerical examples are presented, which demonstrate the unconditional stability and high accuracy of time-domain BEM applied to 3-D elastodynamic crack problems.

关键词: time-domain BEM, 3-D elastodynamic crack problems, dynamic stress intensity factor

Abstract: The time-domain BEM was developed to analyze the dynamic stress intensity factor (DSIF) of 3-D elastodynamic crack problems. To simulate the stress singularity along the front of a crack, eight-node isoparametric singular elements were used, and the DSIF for a semi-circular surface crack was firstly calculated based on displacement equation using the time-domain BEM formulation. The new scheme to determine the time step was brought forward. By the dynamic analysis program of time-domain BEM compiled by us, several numerical examples are presented, which demonstrate the unconditional stability and high accuracy of time-domain BEM applied to 3-D elastodynamic crack problems.

Key words: time-domain BEM, 3-D elastodynamic crack problems, dynamic stress intensity factor

中图分类号:

O346.1

钟明;张永元. THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION[J]. Applied Mathematics and Mechanics (English Edition), 2001, 22(11): 1344-1351.

ZHONG Ming;ZHANG Yong-yuan . THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION[J]. Applied Mathematics and Mechanics (English Edition), 2001, 22(11): 1344-1351.

参考文献

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THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION

THE ANALYSIS OF DYNAMIC STRESS INTENSITY FACTOR FOR SEMI-CIRCULAR SURFACE CRACK USING TIME-DOMAIN BEM FORMULATION

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