Mechanical Yielding and Strength Behaviour of OFHC Copper in Planar Shock Waves
CHEN Da-Nian1, FAN Chun-Lei1, HU Jin-Wei1, WU Shan-Xing1, WANG Huan-Ran1, TAN Hua2, YU Yu-Ying2
1Mechanics and Materials Science Research Center, Ningbo University, Zhejiang 3152112Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900
Mechanical Yielding and Strength Behaviour of OFHC Copper in Planar Shock Waves
1Mechanics and Materials Science Research Center, Ningbo University, Zhejiang 3152112Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900
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.
Abstract：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.
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2007, Vol. 24 
