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脉冲激光产生层裂的一维和二维数值计算

DOI: 10.11858/gywlxb.2005.01.005, PP. 24-28

Keywords: 激光,层裂,热粘塑性本构,损伤

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Abstract:

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。

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