【摘要】 实验和数模结果都揭示动态损伤演化同时依赖于应变和应变率.基于热激活机理提出了一个新的损伤演化率和一个新的断裂准则.为确定材料的损伤参数,发展了两种途径:DM-ZWT途径和BP神经网络途径.两种途径的理论预示都与实验数据很好地相一致.更多还原

【Abstract】 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 data.更多还原