Numerical simulation for dynamic crack propagation by MLPG

被引：1
|
作者：
Liu, Ying [1 ]
Gao, Lingtian [2 ]
机构：
[1] Jiao Tong Univ, Sch Civil Engn, Inst Mech, Beijing, Peoples R China
[2] Peking Univ, Dept Mech & Engn Sci, Beijing, Peoples R China
来源：
FRACTURE AND DAMAGE MECHANICS V, PTS 1 AND 2 | 2006年 / 324-325卷
基金：
中国国家自然科学基金;
关键词：
crack propagation; dynamic fracture; meshless local Petrove Galerkin method;
D O I：
10.4028/www.scientific.net/KEM.324-325.495
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this paper, a new algorithm based on Meshless Local Petrov-Galerking (MLPG) method is presented for analyzing the crack dynamic propagation. A new modified Moving Least Squares approximation is proposed to simplify the treatment of essential boundary conditions. Explicit central difference with lumped mass matrix is adopted for the time integral. Visibility criterion with crack edge node adding technique and the maximum hoop stress criterion are used to describe the crack propagation and forecast the crack propagation direction. Based on this algorithm, three-point bend specimen for impact fracture test is investigated. Comparing the results with those obtained by the laser caustic method and high-speed photographs, the accuracy of the present algorithm is proved.
引用
收藏
页码：495 / +
页数：2
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