摘要
通过简化的物理分析,将脉冲激光加载简化为一定的力学边界条件,考虑了材料内部的损伤演化,采用含损伤的热粘塑性本构模型模拟了铝合金材料的层裂。由于脉冲激光产生的压力脉冲较短,随后的卸载波将使得靶中传播的冲击波压力幅值下降。一维和二维计算得到的层裂片厚度与已有的实验数据符合很好。通过计算,得到了脉冲激光发生层裂时的应变率。
A thermo-visco-plastic constitutive relation for the metal, which can cover plastic hardening (softening) behaviors, thermo-softening behaviors and damage-softening behaviors, is adopted in the numerical computation for analyzing the metal spallation induced by laser. Computations are carried out in one-dimensional and two-dimensional cases, respectively. Attenuation of shock wave pressure is calculated, as well. The calculated spallation thickness is in good agreement with the experimental observations.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2005年第1期24-28,共5页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金项目(10272097)
国家863计划强辐射重点实验室基金(20010501)
