On a Parameter of Equivalent Stress Ratio for Correspondence Between Notched and Unnotched Specimen Fatigue Data

Abstract

As parameter for correspondence between notched and unnotched fatigue data, Equivalent Stress Ratio R_<EQ> was previously proposed based on a hypothesis of Fatigue Plastic Adaptation and its availability was confirmed by authors' experimental data as well as some published experimental ones. In the present study, a basic concept and inductive process on the Equivalent Stress Ratio R_<EQ> was reconsidered.