Dynamic crack propagation in matrix involving inclusions by a time-domain BEM

被引：13

作者：

Lei, Jun ^{[1
]}

Wang, Yue-Sheng ^{[2
]}

Huang, Yifeng ^{[1
]}

Yang, Qingsheng ^{[1
]}

Zhang, Chuanzeng ^{[3
]}

机构：

[1] Beijing Univ Technol, Dept Engn Mech, Beijing 100124, Peoples R China

[2] Beijing Jiaotong Univ, Inst Engn Mech, Beijing 100044, Peoples R China

[3] Univ Siegen, Dept Civil Engn, D-57068 Siegen, Germany

来源：

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS | 2012年 / 36卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Time-domain BEM; Inclusion; Dynamic crack propagation; Bisection technique; Crack-tip instantaneous speed; GROWTH;

D O I：

10.1016/j.enganabound.2011.12.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamic crack propagation in composites with inclusions is analyzed by a time-domain boundary element method (BEM) in conjunction with the sub-region technique. The crack-growth direction and the crack-tip instantaneous velocity are determined by the maximum circumferential stress criterion. The instantaneous velocity is well smoothed by a bisection technique. New crack-tip elements of inconstant length are added to the active crack-tip to simulate the fast crack growth. Square root shape functions are adopted as to describe the proper asymptotic behavior in the vicinity of the crack-tips. The computation time for the dynamic fracture problems in composites with multiple inclusions is reduced by a numerical method. The influences of the inclusions on the shielding ratio, the crack growing path and the crack-tip instantaneous speed are well investigated. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：651 / 657

页数：7

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