A proposed constitutive equation of a single form combining stress, strain, strain rate and temperature effects was examined by applying it to various materials. It was found that the proposed equation is applicable to all the experimental results convering a wide range of strain rate, especially at high strain rates. The parameters of the constitutive equation were presented for fcc and bcc metals in practical forms. A new method to represent the strain rate dependence was also presented. By using the present method, the dynamic and static stress-strain curves can be described fairly well.
