ENDOCHRONIC SIMULATION FOR MULTIAXIAL CREEP

This study replaces the material parameter in the scaling function of the intrinsic time scale, as proposed by Pan et al.((1)), with an expo nential function. Thus, the endochronic theory can be used to simulate the creep behavior of material under multiaxial loading. Experimental creep-test data obtained by Ohashi et al.((2)) on type 304 stainless steel at 650 degrees C under nonproportional repeated loading are used for evaluating the theoretical simulation. In addition, a simple endo chronic creep model proposed by Lee((3)) and four creep models employe d by Kawai((4)) are also included herein. It is shown that the experim ental results are aptly described by the novel theoretical approach de monstrated from a comparison with the theoretical prediction from mode ls employed by Lee((3)) and Kawai((4)).