锻压技术

基于GISSMO断裂失效模型的高强钢落锤压溃仿真分析

英文标题：Simulation analysis on drop hammer crush of high-strength steel based on GISSMO fracture failure model

作者：孔玉强张晓莹段朋王桂录

单位：郑州科技学院

分类号：TG386；TG146

出版年,卷(期):页码：2024,49(3):230-239

摘要：

选取不同性能的DP980钢开展落锤压溃测试过程失效分析。基于GISSMO断裂失效模型，设计了5种不同的断裂失效试样，获取了断裂时刻的等效塑性应变，并搭建了仿真分析模型，提取了各试样断裂时的应力三轴度，拟合获得了断裂失效曲线和塑性失稳曲线。采用仿真和试验相结合的方法，对材料的承载和吸能、不同位置单元的失效过程及相同位置单元的损伤进行了对比分析。研究结果表明：高扩孔性能DP980钢的扩孔率达到了77.6%，明显高于普通DP980钢，其局部延展性也大于普通DP980钢；高扩孔性能DP980钢单位压溃位移吸收能量比普通DP980钢提升了21.74%，表现出更好的吸能特性。

The DP980 steels with different properties were selected to carry out the failure analysis of drop hammer crushing test process. Based on the GISSMO fracture failure model, five different fracture failure samples were designed，and the equivalent plastic strain at the fracture time was obtained. The simulation analysis model was built, the stress triaxiality of each sample at the fracture time was extracted, and the fracture failure curve and the plastic instability curve were obtained by fitting. The comparative analysis on the bearing and energy absorption for materials，the failure processes of elements at different positions and the damage of elements at the same position were carried out by the combination method of simulation and experiment. The research results show that the hole expansion rate of DP980 steel with high hole-expanding performance reaches 77.6%, which is significantly higher than that of ordinary DP980 steel，and its local extensibility is larger than that of ordinary DP980 steel. The unit crushing displacement energy absorption of DP980 steel with high hole-expanding performance is 21.74% higher than that of ordinary DP980 steel, which showing better energy absorption characteristics.

基金项目：

河南省科技厅科技攻关项目（232102220076）；河南省高等学校重点科研项目（24B413011）；郑州科技学院科技攻关项目（2022XJKY09）

作者简介：孔玉强（1989-），男，硕士，讲师，E-mail：sxymtxy@163.com；通信作者：张晓莹（1985-），女，硕士，副教授，E-mail：funworldzxy@163.com

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