【摘要】 基于微损伤发展的NAG(nucleation and growth)模型,从唯相角度,得到了一种微孔洞损伤演化方程。在考虑损伤软化和温度软化的基础上得到了材料含损伤本构关系。将损伤演化方程和材料本构关系引入ABAQUS有限元软件对D6AC和921两种钢板撞击层裂问题进行数值模拟。模拟结果与实验结果吻合。更多还原

【Abstract】 Based on the nucleation-and-growth model of microvoids and the phenomenological assumption,a microvoid damage evolution equation was acquired.The material constitutive relation considering the effects of damage and temperature softening was developed.The damage evolution and material constitutive equations were embedded into the fininte element software ABAQUS with its material interface to simulate numerically the impact spallations of DA6C and 921 steel plates.The simulated results are in good agreement with the experiments.更多还原