基于J-C模型的Q235钢的动态本构关系  

Dynamic constitutive relation based on J-C model of Q235 steel

作　　者：郭子涛[1] 高斌[1] 郭钊[1] 张伟[2] GUO Zitao;GAO Bin;GUO Zhao;ZHANG Wei(School of Civil Engineering and Urban Construction,Jiujiang University,Jiujiang 332005,Jiangxi,China;Hypervelocity Impact Research Center,Harbin Institute of Technology,Harbin 150080,Heilongjiang,China)

机构地区：[1]九江学院土木工程与城市建设学院,江西九江332005 [2]哈尔滨工业大学航天学院高速撞击研究中心,黑龙江哈尔滨150080

出　　处：《爆炸与冲击》2018年第4期804-810,共7页Explosion and Shock Waves

基　　金：国家自然科学基金项目(11072072)

摘　　要：采用万能材料试验机、分离式霍普金森压杆和拉杆系统,研究了Q235钢在常温至900℃的准静态和动态压缩及拉伸力学性能。基于实验结果,修正了Johnson-Cook(J-C)本构模型中的温度软化项,提出了Q235钢的修正J-C本构模型,并利用Taylor撞击实验和数值仿真验证了其动态本构关系。In this paper,we studied the quasi-static performance and the dynamic compression and tensile properties of the Q235 steel at temperatures ranging from the room temperature to 900℃ using a universal testing machine and the split Hopkinson bar system.Based on the experimental results,we modified the thermal softening item in the Johnson-Cook（J-C）constitutive model and proposed a revised J-C constitutive model for Q235 steel,which we then validated using Taylor impact experiments and corresponding numerical simulations.

关 键 词：动态力学性能 本构关系 Taylor撞击 Q235钢 Johnson-Cook本构模型 

分 类 号：O347.3[理学—固体力学]