冲击下宏观相边界的传播

研究了具有CdS型相变本构材料的宏观相边界传播规律。相边界包括纯新相和混合相两段。纯新相段可用逐步近似法,混合相段则必须用数值方法求解。给出了三种加卸载应力边界条件下的算例。在突加突卸的应力边界条件下,给出了相边界传播的解析解。在算例中,各种解法得到的结果彼此很好符合。

Propagation of Macroscopic Phase Boundary under Shock Loading

The propagation of macroscopic phase boundary in materials with CdS type phase transition constitutive law is investigated.Three kinds of loading unloading stress boundary condition are considered.Results show that the phase boundary comprises two segments relating to the purely new phase and mixed phase respectively.The step by step approximation method can be used to the new phase segment,however,the mixed phase segment can only be solved by numerical method.We give calculation examples for three kinds of loading unloading stress boundary conditions.Analytical results could be obtained for suddenly loading unloading stress boundary condition.The results with different methods fit to each other quite well.