高强钢-铝合金材料的流动应力模型研究及应用  

Study on Flow Stress Model of High-Strength Steel and Aluminum Alloy in Clinching

作　　者：李奇涵[1] 王宝中 高嵩[1] 徐传伟 马风雷[1] 韩小亨 袁博 LI Qi-han;WANG Bao-zhong;GAO Song;XU Chuan-wei;MA Feng-lei;HAN Xiao-heng;YUAN Bo(Changchun University of Technology,Changchun 130012,China)

机构地区：[1]长春工业大学机电工程学院,长春130012

出　　处：《精密成形工程》2021年第4期121-126,共6页Journal of Netshape Forming Engineering

基　　金：吉林省科技发展计划(20190302100GX);国家自然科学基金(51805045)。

摘　　要：目的研究常温下无铆连接中高强钢与铝合金材料的应力-应变关系以及本构模型的预测效果。方法通过拉伸试验初步研究材料性能,主要包括屈服强度、拉伸强度和伸长率等;然后采用4种流动应力模型描述塑性段,即本构模型,分别对两种材料的应力-应变关系进行表述。随后采用相关系数R值和平均绝对相对误差EAARE值评价4种模型预测应力的效果。结果4种本构模型均能够较好地描述两种材料的应力-应变关系,高强钢与铝合金材料拟合后的R值高于0.99,E_(AARE)值低于2%。结论通过对比分析,Voce模型表述高强钢材料应力-应变关系的效果更好,Swift模型表述铝合金材料应力-应变关系的效果更好,并成功应用于无铆连接工艺中,且误差均低于5%。This paper aims to study the stress-strain relationship between high-strength steel and aluminum alloy in clinching at room temperature. The material's properties were studied through the tensile test, including yield strength, tensile strength, and elongation. Then, four flow stress models, namely the constitutive model, were used to describe the stress-strain relationship of the two materials. Then the correlation coefficient R and average absolute relative error EAARE were used to evaluate the effect of the four models. The results show that the four constitutive models can well describe the stress-strain relationship of the two materials. The R-value of high-strength steel and aluminum alloy is higher than 0.99, and the EAARE value is lower than 2%. Through comparative analysis, Voce model is more effective to describe the stress-strain relationship of high-strength steel, and the Swift model is more effective to describe the stress-strain relationship of aluminum alloy. It is successfully applied to the clinched process, and the error is less than 5%.

关 键 词：高强钢 铝合金 拉伸试验 本构模型 无铆连接 

分 类 号：TU502[建筑科学—建筑技术科学]