内爆加载下热塑性管壳的应力波演化与层裂效应研究

 在引入材料损伤软化、温度软化效应的基础上，对一维柱对称内聚爆加载管壳中应力波的传播、材料的变形和层裂问题开展了研究。成功地通过自编写有限元代码，完成了系列数值模拟计算，得到了管壁中与物理事实一致的应力波传播图像和材料的变形、损伤、层裂的发展规律，成功模拟了内聚爆加载管壳的多次层裂现象。

Propagation of Stress wave and Spallation of Cylindrical Tube under External Explosive Loading

The deformation and spalling behavior of the cylindrical steel tube under external explosive loading was studied. On the basis of the damage evolution equations and considering damage and temperature softening effects, we obtained the explicit plastic constitutive relations. Numerical simulations were carried out and the computational results were analyzed. The satisfactory agreement between the computational results and the experimental ones shows that the constitutive relations and computational method presented in this paper are reasonable and of important in practical usage.