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.
作者
周兵营
崔学习
关铂镔
吴向东
万敏
Zhou Bingying;Cui Xuexi;Guan Bobin;Wu Xiangdong;Wan Min(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China;Department of Launch Vehicle Testing Technology,Beijing Institute of Aerospace Testing Technology,Beijing 100074,China;Science and Technology on Space Physics Laboratory,China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2024年第7期217-225,共9页
Forging & Stamping Technology
基金
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)。
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
ultra-high strength DP steel sheet
yield criterion
non-associated flow rule
plastic evolution
yield locus
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。
