锻压技术

基于GISSMO失效模型的750L大梁钢断裂失效行为研究

英文标题：Research on fracture failure behavior for 750L large beam steel based on GISSMO failure model

分类号：TG146

出版年,卷(期):页码：2025,50(2):250-255

摘要：

为研究750L大梁钢的断裂失效行为,对其进行动态拉伸试验，采用Swift-Hockett-Sherby模型处理得到真实应力-真实应变曲线，采用多线性弹塑性材料本构模型来有效表征材料的塑性流动行为。并对剪切、单向拉伸、中心孔、R5缺口及胀形5种典型应力状态下的断裂失效行为进行试验分析，得到断裂失效应变与平均应力三轴度并拟合出GISSMO曲线。最后，基于试验数据通过有限元仿真进行GISSMO断裂失效模型对标。结果表明：采用基于GISSMO断裂准则建立的750L大梁钢的GISSMO断裂准则模型对各试样拉伸过程进行仿真，抗拉力与断裂位移的误差均不超过2.67%，仿真结果与试验结果相吻合，说明该材料卡片能够有效预测750L大梁钢的断裂失效过程。

The dynamic tensile experiments of 750L large beam steel were conducted to investigate its fracture failure behavior, the true stress-true strain curves were obtained by the Swift-Hockett-Sherby model and the plastic flow behavior of the material was effectively characterized by a multi-linear elastic-plastic material constitutive model. Then,the experimental analysis on the fracture failure behavior under five typical stress states was conducted, including shear, uniaxial tension, center hole, R5 notch and bulging. Furthermore, the fracture failure strain and the average stress triaxiality were obtained, and the GISSMO curve was fitted. Finally,based on the experimental data, the GISSMO fracture model was benchmarked by finite element simulation. The results show that when the tensile process of each specimen is simulated by the GISSMO fracture criterion model of 750L large beam steel based on the GISSMO fracture criterion, the error between tensile force and fracture displacement does not exceed 2.67%, and the simulation results are consistent with the experimental results, indicating that the material card can effectively predict the fracture failure process of 750L large beam steel.

基金项目：

山东泰山产业领军人才专项（tscx202312011）

作者简介：殷继丽（1993-），女，硕士，工程师,E-mail：2803708366@qq.com

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