Author(s)

T. Hattori and T. Watanabe

Abstract

Fretting wear and fretting fatigue process at the contact edge T. Hattori' and T. Watanabe2 'Mech. Eng. Res. Lab., Hitachi Ltd, 502, Kandatsu, Tsuchiura, Ibnraki, Japan. 2 ~ o w e r & Industrial Product Division, Hitachi, Ltd., Hitachi, lbaraki 31 7-851 1, Japan. Abstract In fretting fatigue, it is well known that the contact edge shifts inward because of wear. The effect of this contact-edge shift on crack propagation is considered here to accurately predict fretting fatigue. The stress intensity factor (KO) for fretting fatigue cracking was calculated by using contact pressure and frictional stress distributions. They were analyzed using the finite element method. The S-N curves of fretting fatigue were predicted by using the relationship between the calculated stress intensity factor range (AK-) and the crack propagation rate (da/dN) obtained from CT specimens. Fretting fatigue tests were conducted on Ni-Cr-Mo-V steel specimens. The S-N curves of our experimental results were in good agree

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