Johnson-Cook本构方程的参数标定  

Parameters calibration for Johnson-Cook constitutive equation

作　　者：李建光[1,2] 施琪[1] 曹结东[3] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]北京大学工学院,北京100871 [3]北京应用物理与计算数学研究所,北京100088

出　　处：《兰州理工大学学报》2012年第2期164-167,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(10632080)

摘　　要：在Johnson-Cook本构方程的理论基础上,从一维应力波实验原理、实验设备及实验数据处理等方面对动态冲击压缩SHPB实验进行系统研究.论述根据准静态实验MTS和冲击压缩实验SHPB的实验数据标定Johnson-Cook本构方程中A、B、n、C、l/ε.plim、m等参数的方法.作为参数标定的实例,给出一个铝锂合金Johnson-Cook本构方程的实验标定参数,说明John-Cook模型的参数标定方法的实用性.On the basis of theory of Johnson-Cook constitutive equation,the dynamic impact compression test SHPB was investigated systematically in connection with its experimental principle of one-dimension stress wave,experimental equipments,and experimental data processing.The method of parameter calibration of A,B,n,C and m in Johnson-Cook constitutive equation was expounded in detail on the basis of above-mentioned SHPB and quasi-static test MTS.As an example of parameter calibration,the experimentally calibrated parameters of Johnson-Cook equation for Al-Li alloy were given,showing that the parameter calibration method was practicable.

关 键 词：Johnson-Cook本构方程 准静态实验MTS 冲击压缩实验SHPB 参数标定 

分 类 号：O347[理学—固体力学]