Abstract
A fretting fatigue numerical model of Ti-6Al-4V alloy is established, and the fretting fatigue crack initiation behaviors (crack initiation position and initiation direction) and initiation life are predicted. The predicted fretting fatigue crack initiation position based on three fatigue wear criteria of relative sliding amplitude, dissipated energy, and equivalent damage stress criteria are compared and analyzed. The fretting fatigue crack initiation direction is calculated using the maximum shear stress criterion as 56°, close to experimental measurement of 59.2°. Eventually, the local stress-strain model and continuous damage model are used to predict the fretting fatigue crack initiation life of Ti-6Al-4V alloy. The predicted fatigue life is in good agreement with the experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 1283-1288 |
| Number of pages | 6 |
| Journal | Journal of Failure Analysis and Prevention |
| Volume | 21 |
| Issue number | 4 |
| DOIs | |
| State | Published - Aug 2021 |
Keywords
- Crack initiation
- Fretting fatigue
- Life estimate
- Numerical modeling