SNotch Effects Under Ultrasonically Vibrating Stress

Abstract

In this study, stress concentration factors and fatigue strength reduction factors are obtained for the case of a round bar of mild steel with a V-groove under ultrasonically vibration stress. The stress concentration factors are determined by FEM analysis on the eigenmodes. The fatigue strength reduction factors are obtained by combining the above analysis and the results of the ultrasonic fatigue tests. These factors are determined under ultrasonically vibrating stress. These results could make the ultrasonic fatigue test more popular than the ordinary fatigue test.