A numerical model for the calculation of fretting fatigue crack initiation for a smooth line contact

Authors

• A Lehtovaara
• C Lönnqvist
• A Mäntylä

Keywords:

fretting fatigue, cracking risk, Dang Van and Findley fatigue criterion, line contact

Abstract

A numerical model for the calculation of fretting fatigue crack initiation in smooth elastic contact is presented. The model is focused on cylinder-on-plane contact and it can be applied in partial and gross slip conditions by using a constant normal force, a reciprocating tangential force and a cyclic bulk stress. The model is based on explicit stress equations, the multi-axial Dang Van and Findley fatigue criteria and a statistical size factor concept. The model allows non-symmetric traction distribution caused by cyclic bulk stress and the calculation of relative tangential surface displacement. The results from the model correlate well with the corresponding FE-results. The model developed is fast.