采用Gurson模型对材料在拉伸状态下的颈缩、损伤与破坏过程进行分析.应用有限元数值模拟、最优化算法和实验研究相结合,对材料参数进行优化识别.将获得的Gurson损伤参数应用于2169延性金属材料在拉伸状态下的破坏分析.
The Gurson model was used to simulate the damage, necking and fracture processes of 2169 steel rod. The materials parameters were obtained through combination of experiments and numerical analysis, including optimization techniques. The material parameters were applied to simulate the ductile fracture of 2169 rod, the numerical results showed agreement with experiments.