Rate-dependent Damage Evolution and its Influence on Dynamic Behavior of Materials at High Strain Rates

Both experimental and numerical results reveal that dynamic damage evolution depends on both strain and strain rate.Based on the thermal activated mechanism,a new damage evolution law and a new fracture criterion are proposed.For determining the damage parameters of material,two approaches are developed:the DM-ZWT approach and the SHPB+BP neural network approach.The predictions by both approaches are in good agreement with the experimental...