Abstract
Ansys was applied to analysis the contact status of a plane specimen contacting with a rectangular fretting pad. The distribution of the stresses and the three zones (sticking, slipping and opening) on the contact surface were determined. Evolution of contacting status was also analyzed under fretting cycles. A modified crack analogue method (MCAM) was put forward to predict life of fretting fatigue based on above results. Experiments under different cyclic loads and nominal contact stress were conducted to verify the validity of MCAM. The results show that the normal stress and shear stress change sharply at the edge of the mixed sticking /slipping zones in fretting process. Tensile stress amplitude reaches maximum value at the edge of the mixed slipping /opening zones, where the cracks initiate and propagate more easily. The fretting fatigue life predicted by the MCAM agrees with well experiment results.
| Original language | English |
|---|---|
| Pages (from-to) | 729-734 |
| Number of pages | 6 |
| Journal | Jixie Qiangdu/Journal of Mechanical Strength |
| Volume | 33 |
| Issue number | 5 |
| State | Published - Oct 2011 |
Keywords
- Crack analogue method
- Finite element method (FEM)
- Fretting fatigue
- Life prediction
- Titanium alloy