惯性及弹塑性效应对延性金属材料层裂损伤的影响

本文以空心球壳模型为基础,在飞片加载条件下,讨论了惯性、弹塑性效应以及初始孔洞大小对材料层裂损伤的影响.分析结果表明,在研究材料层裂损伤问题时,惯性、弹塑性效应以及初始孔洞大小的影响是不能忽略的,特别是初始孔洞大小的影响.同时,鉴于初始孔洞大小的重要影响,本文尝试给出了一个分析初始孔洞尺寸的方法. 关键词： 层裂损伤 惯性 弹塑性效应 初始孔洞

Inertial and elastic-plastic effect on spallationdamage of ductile metals

The influences of inertia, elastic-plastic effect and initial void size are studied on the damage evolution in spallation of ductile metals under planar impact loading by using the hollow spheroid model. Numerical analysis indicates that inertia, elastic-plastic effect and initial void size each have a significant influence. Influence of Initial damage or initial void size on spallation damage cannot be neglected. In this paper we attempt to develop a method to analyse initial void size due to its importance on spallation damage.