THE PROCEDURE FOR IDENTIFYING MATERIAL PARAMETERS OF HYPERELASTICITY BY CONSIDERING STRESS STATE IN THE STRUCTURE AND VERIFICATION BY COMMERCIAL FEA CODE

Abstract

The response of stress of hiperselastic materials such as rubber generally exhibits complex non-linear behavior. Although the conventional identification of the material constants are carried out by using results of three types biaxial material tests, the results of stress analysis using these identified material parameters are not always satisfactory in accuracy. In this study, a novel methodorogy for identification of material parameters is proposed, which incorporates the importance evaluation of results of material testings in material constants by considering the deformation state appearing in stress analysis of target problems and the effectiveness of the proposed method is evaluated by numerical experiments.