Creep of Mild Steel under Periodic Stresses of Rectangular Wave : (III) Prediction of the Creep Deformation under Periodic Stresses

Abstract

In the preceding paper, it was clarified that the deformation of mild steel subjected to an unsymmetrical stress wave could not be predicted by the mechanical equation of state in solid, which was often called the strain hardening theory, while the deformation under a symmetrical stress wave could be predicted by it. The purpose of this paper is to establish a method of predicting the deformation under unsymmetrical periodic stresses as well as the deformation under symmetrical periodic stresses. The deformation was predicted by the authors' theory of deformation, which explained the behavior of material at any instant from the viewpoint of the integrated effect of work hardening and recovery, which the material had experienced before. It is concluded that prediction by this method is considerably good in any case of rectangular stress wave.