中南大学学报（自然科学版）2018，Vol.49Issue(5)：1072-1079,8.DOI:10.11817/j.issn.1672-7207.2018.05.007
基于动态材料参数的5083铝合金本构模型
Constitutive model of 5083 aluminum alloy based on dynamic material parameters
摘要
Abstract
The flow stress features of 5083 aluminum alloy were investigated by the isothermal compression test at the strain rates of 0.01-10 s-1, the temperatures of 300-500 ℃ and the deformation degree of 50%. According to the thermal simulation data, the hyperbolic sine constitutive model (ZHCM) and power function constitutive model (ZBCM) were established based on the dynamic material parameters. Furthermore, the stress prediction accuracies of two constitutive models were calculated. The results show that both ZHCM and ZBCM have high stress precision of prediction, and the average relative errors of stress are 5.26% and 3.92%, respectively. By contrast, the ZHCM has higher stress accuracy at the strain rate of 10 s-1and the deformation temperature of 300 ℃, while the stress accuracy of ZBCM predicts more accurately at the strain rate of 0.01-1 s-1and the deformation temperature of 350-500 ℃.关键词
5083铝合金/热压缩/流变应力/动态材料参数/本构模型Key words
5083 aluminum alloy/hot compression/flow stress/dynamic material parameter/constitutive model分类
矿业与冶金引用本文复制引用
戴青松,邓运来,欧世声,付平..基于动态材料参数的5083铝合金本构模型[J].中南大学学报（自然科学版）,2018,49(5):1072-1079,8.基金项目
广西科学研究与技术开发计划项目(1598001-2,14122001-5)(Projects(1598001-2,14122001-5)supported by the Scientific Research and Technology Development Program of Guangxi) （1598001-2,14122001-5）
