Research on the Fracture Mechanism of Scored Liner Under Explosive Loading  

作　　者：尹建平 王志军 张云逸 周栋 

机构地区：[1]College of Mechatronic Engineering, North University of China [2]Unit No.63936

出　　处：《Defence Technology（防务技术）》2011年第4期224-228,共5页Defence Technology

摘　　要：The notch tip fracture criterion of cored liner is proposed based on a dislocation model. The analysis reveals that the ductile shear fracture is a dominant fracture mode in the scored liner, and the fracture path is along the maximum shear stress tracing line. The numerical simulation of fracture process of scored liner under explosive loading is performed using the nonlinear finite element analysis program ANSYS-LS/DYNA, and then the experiments are made to verify the simulation. The experimental results are demonstrated to be in line with the numerical simulation results. The liner can form a focused jet of metal fragments with certain amount and mass that travels at very high speed in the cone-angle direction, which indicates that the dislocation model can be used to analyze the crack fracture of notch tip.The notch tip fracture criterion of cored liner is proposed based on a dislocation, model. The analysis reveals that the ductile shear fracture is a dominant fracture mode in the scored liner, and the fracture path is along the maximum shear stress tracing line. The numerical simulation of fracture process of scored liner under explosive loading is performed using the nonlinear finite element analysis program ANSYS-LS/DYNA, and then the experiments are made to verify the simulation. The experimental results are demonstrated to be in line with the numerical simulation results. The liner can form a focused jet of metal fragments with certain amount and mass that travels at very high speed in the cone-angle direction, which indicates that the dislocation model can be used to analyze the crack fracture of notch tip.

关 键 词：爆炸荷载作用 班轮 破坏机理 有限元分析程序 数值模拟 模拟实验 最大剪应力 断裂准则 

分 类 号：TG115[金属学及工艺—物理冶金]