不同屈服模型对DP980和QP980钢板各向异性和屈服轨迹的预测能力  

Prediction ability of different yield models for anisotropy and yield trajectory of DP980 and QP980 steel plates

作　　者：张军[1] 王宝堂 陈新力 詹华[1] 李晓东[2] 余树洲 常颖[2] ZHANG Jun;WANG Bao-tang;CHEN Xin-li;ZHAN Hua;LI Xiao-dong;YU Shu-zhou;CHANG Ying(Technology Center,Magang(Group)Holding Co.,Ltd.,Maanshan 243003,China;School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000 [2]大连理工大学汽车工程学院,辽宁大连116024

出　　处：《塑性工程学报》2022年第7期140-147,共8页Journal of Plasticity Engineering

摘　　要：以1 mm厚度的DP980和QP980高强度钢板为研究对象,进行了不同方向上的单向拉伸试验和非等比例双向拉伸试验,获得了屈服应力和各向异性系数r以及两种材料的屈服轨迹的试验结果。然后选择Hill1948、Barlat2000-2D和BBC2005这3个各向异性屈服模型进行了对比研究,推导了理论屈服强度和各向异性系数r的数值计算公式并计算了其结果。通过将理论计算值与试验结果进行对比可以发现,相比于Hill1948屈服模型,Barlat2000-2D和BBC2005屈服模型的计算结果基本一致,二者均可对DP980和QP980钢板的屈服应力、各向异性系数r以及屈服轨迹进行准确预测。Taking DP980 and QP980 high-strength steel plates with thickness of 1 mm as the research object, uniaxial tensile tests in different directions and non-proportional biaxial tensile tests were carried out, and the test results of yield stress, anisotropic coefficient r and yield trajectory of the two materials were obtained. Then, three anisotropic yield models including Hill1948, Barlat 2000-2 D and BBC2005 were selected for comparative study. The numerical calculation formulas to calculate the theoretical yield strength and anisotropic coefficient r were derived and the results were calculated. By comparing the theoretical calculated values with the test results, it is found that compared with the Hill1948 yield model, the Barlat2000-2 D and BBC2005 yield models have similar calculation results and both of them can predict the yield stress, anisotropic coefficient r and yield trajectory of DP980 and QP980 steel plates accurately.

关 键 词：屈服模型 材料各向异性 单向拉伸 双向拉伸 理论计算 

分 类 号：TG142.12[一般工业技术—材料科学与工程]