工程科学学报2016，Vol.38Issue(2)：213-222,10.DOI:10.13374/j.issn2095-9389.2016.02.009
800MPa级冷轧双相钢的动态变形行为及本构模型
Constitutive model and dynamic deformation behavior of 800 MPa grade cold-rolled dual phase steel
摘要
Abstract
The Hopkinson experiment system was used to do the dynamic tensile experiment of 800 MPa grade cold rolled dual phase steel (DP800). The strain rate was determined as 500, 1000 and 2250 s-1. By comparing the experimental results, both the yield strength ( Rp0. 2 ) and the tensile strength ( Rm ) of the dual phase steel increase with strain rate in the exponential form. The plas-tic deformation at high strain rate leads to adiabatic temperature rise effect. The adiabatic temperature rise is 89℃ at the 2250 s-1 strain rate. Based on the J-C ( Johnson-Cook) model and Z-A ( Zerilli-Armstrong) model, the constitutive model of the dual phase steel was researched. The quadratic polynomial of strain rate effect of the J-C model was modified. The average coefficient of determi-nation increases from 0. 9228 to 0. 9886 by modifying the J-C model.关键词
双相钢/动态试验/拉伸试验/变形特性/本构模型/力学性能Key words
dual phase steel/dynamic testing/tensile testing/deformation characteristics/constitutive models/mechanical properties分类
矿业与冶金引用本文复制引用
蔡恒君,胡靖帆,宋仁伯,代启锋..800MPa级冷轧双相钢的动态变形行为及本构模型[J].工程科学学报,2016,38(2):213-222,10.基金项目
国家高技术研究发展计划资助项目(2009AA03Z518) （2009AA03Z518）
