The effects of strain on material constants of hot deformation were discussed emphatically by analyzing the feature of flow stress curves,and the hot deformation microstructure of aluminum alloy was studied by OM and TEM.

The material constants were determined by use of numerical analysis and the creep constitutive equations and damage growth equations of 10CrMo910 steel were obtained.

R-T characteristic is not a strictly exponential curve and material constant is the function of temperature.

Several methods,obtaining material constants of rubber Mooney-Rivlin Model,were discussed in this paper,so as to ues those constants for nonlinear finite element analysis (FEA) of rubber products.

The influences of different material constants on the mechanical, electric and electromechanical characteristics were studied by finite element method (FEM) and ANSYS software.

The formulas of material constants estimation for Bodner Partom elastic viscoplastic constitutive model are derived, and the unreasonable formulas in a relevant literature are modified.

The method is to adopt the ratio of plastic strain range to elastic strain range as the stress-strain parameter, using the staple material constants as the material parameters in damage calculating expression.

According to the results of linear elastic and nonlinear elastic-plastic analysis by the MARC code,the effect of film cooling holes is substituted by equivalent material constants and equivalent stress.