Abstract
This work first examines the fatigue crack growth histories (from microns to millimetres) of a range of test specimens and service loaded components and concludes that in most cases rack growth follows the generalised Frost and Dugdale crack growth law, i.e. as a first approximation there is a linear relationship between the log of the crack length or depth and the service history (number of cycles). It is then shown how the Frost and Dugdale crack growth law, incomplete self-similarity, the two parameter crack growth model, and fractal fatigue concepts are related. Also shown are how this law can be used to predict crack growth from sub microns to mm's in a range of full-scale aircraft fatigue tests and coupon tests, including aircraft fuselage lap-joints.
| Original language | English |
|---|---|
| Title of host publication | Multiscaling in Molecular and Continuum Mechanics |
| Subtitle of host publication | Interaction of Time and Size from Macro to Nano: Application to Biology, Physics, Material Science, Mechanics, Structural and Processing Engineering |
| Publisher | Springer |
| Pages | 197-240 |
| Number of pages | 44 |
| ISBN (Print) | 1402050615, 9781402050619 |
| DOIs | |
| Publication status | Published - 1 Dec 2007 |
Keywords
- Crack growth
- Experimental crack growth
- Fatigue prediction
- Fractals
- Short cracks