Constitutive equation of annealed copper with high conductivity for deformation at high strain rates

来源期刊：中国有色金属学报(英文版)2004年第4期

论文作者：朱远志 尹志民 姜锋 宋练鹏 曾渝 杨扬

文章页码：775 - 778

Key words：fcc metals; dynamical calculation; constitutive relation

Abstract: After the discussion of a lot of constitutive equations, Zerilli-Armstrong constitutive equation (Z-A equation) was found to be a quasi-static equation. Based on this Z-A equation, a constitutive relations equation was constructed for dynamical calculation of fcc matels such as OFHC based on the thermal viscoplastic relations, where thermal dynamical parameters are related to the evolution of the microstructure of the deforming metals, and the variation of the density of the mobile dislocation was also considered. Data from the deformation of annealed copper were used to fit the parameters in the equation. The predicting results by using the constitutive equation are in good agreement with the experimental data.