Fretting Wear Effect on Fretting Fatigue by Findley Parameter in Mixed Slip Regime

When there is a small amplitude relative slip between two contacting parts, fretting happens. Wear, fatigue and corrosion are the three main damages caused by fretting. In reality, these three damages interact with each other, which is not emphasized in current research. Findley parameter (FP) is a commonly used parameter that can be utilized to analyze fretting wear. In this paper, the wear profile updating effect on fatigue is analyzed by FP in mixed slip regime of fretting. A finite element (FE) model of a cylinder-on-flat configuration is built to investigate the FP difference between models with and without wear profile updating. The results showed that FP in the model with wear profile updating was lower compared with the model without wear profile updating near the contact edge. It can be concluded that fretting wear shows a positive effect on fretting fatigue. Moreover, the predicted life shows a good agreement with experiments.