Title: A fretting fatigue life model considering the effects of contact stress and cyclic stress amplitude

Authors: Kyungmok Kim

Addresses: School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76 Hanggongdaehak-ro, Deogyang-gu, Goyang-si, Gyeongi-do, 412-791, South Korea

Abstract: This article developed a fretting fatigue life model of metallic materials. A fretting fatigue model incorporating imposed contact pressure and cyclic stress amplitude was established based on a bearing life theory. Fretting fatigue lifetime data of various metallic materials were collected from the literature. The effect of contact pressure on the number of fretting cycles to failure was investigated. It was identified that at low contact pressures, the number of fretting cycles to failure can be described by an inverse power-law function of contact stress. When the contact pressure exceeded the critical value, the number of fretting cycles to failure remained almost constant, regardless of the imposed contact pressure. Finally, a direct comparison between predicted and measured lifetime values was performed. The results revealed small errors (less than 13%) between predicted and measured values, attributed to the variance in fretting fatigue tests.

Keywords: fretting fatigue; fatigue lifetime; contact pressure; fatigue model; cyclic stress amplitude.

DOI: 10.1504/IJSURFSE.2025.149462

International Journal of Surface Science and Engineering, 2025 Vol.19 No.4, pp.363 - 378

Received: 14 Mar 2025
Accepted: 21 Jun 2025
Published online: 01 Nov 2025 *

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