Study on the Damage Constitutive Model of the PBX

摘要

In this paper, a statistical meso-damage constitutive model of the PBX is established based on the SCRAM and VISCO-SCRAM model. Firstly using the generalized energy release rate and the dynamic fracture mechanics establishing the damage evolvement of micro-cracks, then combining the meso-damage mechanics with the visco-elastic mechanical response establish the constitutive relationship of the PBX, then add the constitutive model into Ls-dyna, and use this material constitutive model simulating the plane impact experiment, the simulation result shows that this constitutive model can present the dynamic mechanical response of the PBX much better.