Numerical simulation of loading edge cracks by edge impact using the extended finite element method  

作　　者：Qinghua Meng Zhenqing Wang 

机构地区：[1]College of Aerospace and Civil Engineering, Harbin Engineering University

出　　处：《Acta Mechanica Solida Sinica》2015年第2期156-167,共12页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11272096 and 11472086);the Research Fund for the Doctoral Program of Higher Education of China(No.20112304110015)

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.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.

关 键 词：extended finite element method crack propagation dynamic impact implicit dy- namics 

分 类 号：O346.1[理学—固体力学] O241.82[理学—力学]