Abstract
The load interaction effects that occur under variable amplitude loading conditions following single peak overloads, low-high blocks and high-low blocks have been investigated on a commonly used structural steel. A detailed investigation has been carried out on long cracks which aims at developing and assessing the efficacy of a simple predictive model based on closure and plastic zone effects.The material was tested in a quenched and tempered condition. All the tests were carried out in the four point bending mode, in both the Paris regime and near the threshold, with overloads ranging from 10% to 100%.An attempt to relate crack closure to crack growth rates in the transient growth rate region (which follows a load change) was made.The trends observed for a wide range of loading parameters are presented.
| Original language | English |
|---|---|
| Pages (from-to) | 207-216 |
| Number of pages | 0 |
| Journal | Fatigue & Fracture of Engineering Materials & Structures |
| Volume | 19 |
| Issue number | 0 |
| DOIs | |
| Publication status | Published - 1996 |
Keywords
- variable amplitude loading
- crack closure
- medium carbon (En8) steel
- FATIGUE
- OVERLOADS