锻压技术

基于塑性演化的非关联Hill48屈服准则及其在超高强DP钢板中的应用建模预测

英文标题：Non-associated Hill48 yield criterion based on plastic evolution and its application in ultra-high strength DP steel sheet

作者：周兵营1 崔学习2 关铂镔3 吴向东1 万敏1

单位：1.北京航空航天大学机械工程及自动化学院 2. 北京航天试验技术研究所运载试验技术事业部 3.中国运载火箭技术研究院空间物理重点实验室

关键词：超高强DP钢板屈服准则非关联流动法则塑性演化屈服轨迹

分类号：TG301

出版年,卷(期):页码：2024,49(7):217-225

摘要：

针对超高强DP钢板在复杂加载条件下的塑性行为，采用一种考虑塑性演化的非关联Hill48屈服准则，实现了以较简单的屈服方程准确地预测DP钢屈服及后继屈服轨迹的目的。通过0°、45°和90°方向的单拉实验和复杂加载比例的十字形试件双拉实验，获得了超高强DP1180钢板的基本力学性能参数和拉伸屈服轨迹，采用不同的屈服准则对实验屈服轨迹进行预测。研究表明，考虑塑性演化的非关联Hill48屈服准则对DP1180钢板初始屈服轨迹的预测精度与Yld2000-2d屈服准则预测精度相近，而且还能以同等的精度预测后继屈服轨迹，可以超高强DP钢板屈服及后继屈服行为的精确表征，可应用于超高强DP钢板材冲压成形过程的有限元分析、模具设计和工艺优化。

For the plastic behavior of ultra-high strength DP steel sheet under complex loading condition, based on an non-associated Hill48 yield criterion considering plastic evolution, the initial and subsequent yield locus of DP steel predicted accurately by a simple yield equation were realized. Then, the basic mechanical properties and tensile yield locus of ultra-high strength DP1180 steel sheet were obtained by uniaxial tensile tests in 0°, 45° and 90° directions and biaxial tensile tests of cross-shaped specimens with complex proportional loading, and the experimental yield locus was predicted by using different yield criteria. The results show that the prediction accuracy of the non-associated Hill48 yield criterion considering plastic evolution for the initial yield locus of DP1180 steel sheet is similar to that of Yld2000-2d yield criterion, which can also predict the subsequent yield locus with the same highest accuracy and realize the precise characterization of the initial and subsequent yield behaviors of ultra-high strength DP1180 steel sheet, and can be applied to finite element analysis, die design and process optimization of stamping process for ultra-high strength DP steel sheet.

基金项目：

国家自然科学基金资助项目(51875027)；宝钢汽车用钢开发与应用技术国家重点实验室基金资助项目（2021090602）

作者简介：周兵营（1994-），男，博士研究生 E-mail：zhoubingying@buaa.edu.cn 通信作者：吴向东（1970-），男，博士，副教授 E-mail：wuxiangdongbuaa@163.com

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