汽车用合金化镀锌深冲钢板动态变形行为试验研究及仿真分析  

Dynamic Deformation Behavior Experiments of Alloy Galvanized Deep Drawing Steel Sheet for Automobile and Simulation

作　　者：陈贵江[1] 康永林[1,2] 朱国明[1] 吕超[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《机械工程学报》2010年第24期10-15,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划资助项目(863计划;2009AA03Z518)

摘　　要：针对汽车用合金化镀锌深冲钢板(DC53D+ZF),采用准静态及动态拉伸试验,对不同应变率下钢板的动态变形行为进行研究,得到0～500 s–1应变率范围内的6种应变率下的应力应变关系,在试验结果的基础上,推导出该钢板的Johnson-Cook本构模型。为进一步验证该本构模型,基于矩形梁碰撞的仿真模型,对不考虑应变率、Johnson-Cook、Cowper-Symonds模型及试验数据进行对比分析,所推导的J-C模型与试验结果吻合较好。表明所得到的模型可以很好地描述DC53D+ZF材料高应变率下的动态变形行为。Quasi-static and dynamic tensile tests are carried out on alloyed galvanized deep drawing steel sheet for automobile（DC53D＋ZF） to investigate its tensile mechanical behavior under different strain rates.Stress-strain relationships are obtained in strain rate range of 0～500 s–1.Johnson-Cook constitutive model of the steel is derived from the experiment results.Model without considering strain rate,Johnson-Cook,Cowper-Symonds model and experiment data are compared by simulation model of rectangular cross section beam collision.The results show that the J-C constitutive model derived is in good agreement with the test results,which proves the parameters obtained can well describe the dynamic deformation behavior of DC53D＋ZF under high strain rate.

关 键 词：动态拉伸 应变率 Johnson-Cook 本构 碰撞 仿真 

分 类 号：TG142.1[一般工业技术—材料科学与工程]