Mechanical Yielding and Strength Behaviour of OFHC Copper in Planar Shock Waves  

作　　者：陈大年 范春雷 胡金伟 吴善幸 王焕然 谭华 俞宇颖 

机构地区：[1]Mechanics and Materials Science Research Center, Ningbo University, Zhejiang 315211 [2]Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900

出　　处：《Chinese Physics Letters》2007年第3期786-789,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10472048, and the Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, CAEP, under Grant No 9140C6702020603.

摘　　要：It is necessary to study the validation of strength models under planar shock loading in view of the fact that strength models for metals obtained at moderate strain rates are often used in the numerical simulations of shock wave phenomena. The variations of longitudinal stress, transverse stress and yield strength of oxygen-free high conductance （OFHC） copper with time under planar shock loading are obtained by using the manganin stress gauges and compared with the predicted results by the constructed seven constitutive models based on Y/G=constant and on G/B=constant （Y the yield strength, G the shear modulus, B the bulk modulus）, respectively. It seems that the pressure, density, temperature and plastic strain dependence of the yield strength for OFHC copper under planar shock loading is essential to the constitutive description.It is necessary to study the validation of strength models under planar shock loading in view of the fact that strength models for metals obtained at moderate strain rates are often used in the numerical simulations of shock wave phenomena. The variations of longitudinal stress, transverse stress and yield strength of oxygen-free high conductance （OFHC） copper with time under planar shock loading are obtained by using the manganin stress gauges and compared with the predicted results by the constructed seven constitutive models based on Y/G=constant and on G/B=constant （Y the yield strength, G the shear modulus, B the bulk modulus）, respectively. It seems that the pressure, density, temperature and plastic strain dependence of the yield strength for OFHC copper under planar shock loading is essential to the constitutive description.

关 键 词：PIEZORESISTANCE GAUGES MODEL METALS 

分 类 号：O3[理学—力学]