Studies on Low Cycle Impact Fatigue Strength of Steel Plates

Abstract

It is assumed that fatigue strength of steel under various cyclic loading is only affected by strain distribution, namely, cyclic plastic strain range, cyclic creep rate, ratio of longitudinal to transverse strain and strain concentration factor and does not depend on type of loading. The formulae proposed by the authors for cumulative fatigue damage law under ordinary cyclic load was applied to fatigue crack initiation life of mild steel plate under axial cyclic impact load, and it was found that the validity of the formulae for estimation of the fatigue life of cyclic impact loading was verified.