Numerical analysis of the effect on wear on crack propagation in fretting by linear
elastic fracture mechanics
S. Wang and M.Abdel. Wahab
Ghent University, Laboratory Soete, Gent, Belgium
International Conference on FFW2021
Abstract
Fretting is a common phenomenon in engineering applications. Many researchers have investigated the damage in fretting such as fretting wear and fretting fatigue. Wear is dominant in gross slip regime in fretting, while fatigue plays an important role in partial slip regime. In partial slip regime, the wear also affects the crack initiation and propagation due to the geometry change on the contact surface. The effect of wear on crack initiation in partial slip regime is analysed by some researchers at present. However, there is not enough research on the effect of wear on crack propagation in partial slip regime. In this paper, the effect of the wear on fretting fatigue is analysed in partial slip regime by linear elastic fracture mechanics (LEFM). The result shows that the wear has a dramatic effect on the contact pressure and tangential stress on the contact surface which can affect the opening of the crack in propagation.
Conclusion:
1. The contact pressure on the right side of crack with wear profile is higher
than that without wear profile
2. The tangential stress on the left side of crack with wear profile is lower than that without wear profile
Future work:
1. The effect of wear on crack path and crack propagation lifetime should be further considered.
2. If there is debris in fretting fatigue process, the effect of the third body can be investigated.
