Uninstall The Characteristics Of Metallic Materials In The Dynamic Response Process

Based on development of shock dynamic response study to metal materials, character processes of dynamic response are described and analyzed simply in this article. The difference between theory calculation and results of experiment is refocused. In theory calculation, the same elastic-plastic limited condition is used in loading process and unloading process, so flat roof of free velocity is appeared. Quasielastic unloading rule is used to simulated dynamic state of initialization unloading process. In the same time, through analyzing and comparing to different models of damage evolvement, Fengjiabo model of damage evolvement and spallation criterion are used to simulate shock-unloading spallation process and second shock process.The results of simulation indicate that the constitutive model and damage evolvement model and spallation criterion is adapted to selected metal materials, the theory simulation results and experiment datas are agreement in much portion.