STUDY ON ESTIMATION OF FATIGUE STRENGTHS OF NOTCHED STEEL MEMBERS.

Abstract

In the present study, the steady-state strain range at the root of a notch under repetitive loading was computed by finite element method analysis taking the cyclic stress range-strain range curve as the stress-strain relationship, and the appropriateness of this estimation method was examined through comparisons with measured values. The life of each notched specimen until initiation of fatigue crack was plotted against the estimated strain range obtained by finite element analysis, and this was compared with the fatigue curve of the base material.