Abstract
Surface fatigue crack propagation is the typical failure mode of engineering structures. In this study, the experiment on surface fatigue crack propagation in 15MnVN steel plate is carried out, and the crack shape and propagation life are obtained. With the concept of 'equivalent thickness' brought into the latest three-dimensional (3D) fracture mechanics theory, one closure model applicable to 3D fatigue crack is put forward. By using the above 3D crack-closure model, the shape and propagation life of surface fatigue crack in 15MnVN plates are predicted. The simulative results show that the 3D fracture mechanics-based closure model for 3D fatigue crack is effective.
| Original language | English |
|---|---|
| Pages (from-to) | 682-688 |
| Number of pages | 7 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 34 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2011 |
Keywords
- 3D fracture mechanics
- crack closure
- equivalent thickness
- fatigue crack propagation
- surface fatigue crack