NUMERICAL SIMULATION OF LOADING EDGE CRACKS BY EDGE IMPACT USING THE EXTENDED FINITE ELEMENT METHOD

被引：9
|
作者：
Meng, Qinghua [1 ]
Wang, Zhenqing [1 ]
机构：
[1] Harbin Engn Univ, Coll Aerosp & Civil Engn, Harbin 150001, Peoples R China
来源：
ACTA MECHANICA SOLIDA SINICA | 2015年 / 28卷 / 02期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
extended finite element method; crack propagation; dynamic impact; implicit dynamics; ENERGY-RELEASE RATE; GROWTH;
D O I：
10.1016/S0894-9166(15)30004-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The extended finite element method is used to analyze a plate with two parallel edge cracks impacted by a cylindrical projectile. The influence of the impact speed, crack length, plate thickness and notch tip radius on the crack initiation and propagation is studied. Dynamics equations are solved by an implicit time integration scheme which is unconditionally stable. Very good agreement is achieved between numerical predictions and experimental results. The critical velocity of the crack initiation under different conditions is examined. The influence of the crack length is greater than that of the impact speed, plate thickness and notch tip radius.
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页码：156 / 167
页数：12
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