Author(s)

H. Nisitani, T. Teranishi, K. Sato & S. Tanaka

Abstract

In general machines and structures have a rough surface due to machining Therefore, it is important to investigate the effect of an extremely shallow notch on fatigue strength. In the present study, rotating bending fatigue tests were carried out on annealed or quenched-and-tempered 0.45% carbon steel specimens with extremely shallow partial notches whose depths are constant and whose notch radii are different. This means that the values of Varea are constant and the radii of notch are different. The fatigue strength of these specimens was investigated by linear notch mechanics and Varea parameter model. Moreover, the limitation for application of the model was discussed. 1 Introduction Because ma

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