Abstract
The influence on the crack growth rate on a micro-structurally short edge crack subjected to fatigue loading from changes in crack length, distance to grain boundaries and applied load has been investigated. The crack is assumed to grow in a single shear mechanism due to nucleation, glide and annihilation of dislocations along preferred slip planes in the material. The external geometry is modelled by distributed dislocation dipole elements in a boundary element approach under quasi-static and plane strain conditions. The evolving plasticity is described by individual discrete dislocations along a slip plane emanating from the crack in the crack direction. The crack growth rate is shown to be controlled by the plasticity, which in turn is controlled by geometrical parameters in combination with the external load. (C) 2010 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 1907-1913 |
| Journal | Engineering Fracture Mechanics |
| Volume | 77 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2010 |
| Event | 3rd International Conference on Crack Paths, 2009 - Venice, ITALY, Venice, Italy Duration: 2009 Sept 23 → 2009 Sept 25 Conference number: 3 |
Subject classification (UKÄ)
- Applied Mechanics
Free keywords
- Grain
- Crack growth rate
- Short fatigue crack
- Discrete dislocations
- boundary