Perhaps constitutive equation has to be fortified by experimental evidence.
The constitutive equation may also be verified by experimental data.
The principle and method for fitting and estimation of constitutive equation model parameters are discussed.
Analysis of the results indicates that by the constitutive equation the strain rate de-pendence and thermo-softening effect of TNT are described.
The monotonicity analysis is used to investigate the unified creep damage constitutive equations and some characteristics have been obtained.
The source and development for some constitutive equations which are often used now are reviewed, and the features and applications of these equations are also analyzed and discussed.
