Abstract
Understanding the physical bases of a cracked sample's macroscopic response to applied loading, e.g. fatigue crack closure, requires non-destructive, microscopic quantification of the crack face separations as a function of applied load. Ideally, these measurements should cover the entire crack face. Non-destructive sectioning with high resolution X-ray computed tomography has been used for in situ observations of the crack faces under applied load in samples of Al-Li 2090, and in this paper, the crack openings that were measured in the interior of the sample are related to crack face geometry and to changes in the slope of load-displacement curves. The implications of these results are discussed for physically based crack closure modelling.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 439-450 |
| Number of pages | 12 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 21 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1998 |
Keywords
- 2090 Aluminium alloy
- Fatigue crack closure
- Non-destructive evaluation
- X-ray microtomography
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering