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

After the discussion of a lot of constitutive equations,Zerilli-Armstrong cons titutive equation (Z-A equation) was found to be a quasi-static equation. Base d on this Z-A equation,a constitutive relations equation was constructed for dynamical calculation of fcc matels such as OFHC based on the thermal viscoplast ic 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 anneal ed copper were used to fit the parameters in the equation. The predicting result s by using the constitutive equation are in good agreement with the experimental data.