Endochronic Simulation for Multiaxial Creep

Abstract

This study replaces the material parameter in the scaling function of the intrinsic time scale, as proposed by Pan et al.⁽¹⁾ with an exponential 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°C under nonproportional repeated loading are used for evaluating the theoretical simulation. In addition, a simple endochronic creep model proposed by Lee⁽³⁾ and four creep models employed by Kawai⁽⁴⁾ are also included herein. It is shown that the experimental results are aptly described by the novel theoretical approach demonstrated from a comparison with the theoretical prediction from models employed by Lee⁽³⁾ and Kawai⁽⁴⁾.