An argument for a cycle-by-cycle propagation of fatigue cracks atsmall stress intensity ranges
Abstract
A model is presented in which the plastic strains around a growing fatigue crack are discretized in the form of geometrically necessary dislocations. The model explains the existence of a threshold and the near threshold regime. It also explains the minimum value of striation spacing with decreasing amplitude of stress intensity. The model corresponds to a "cycle-by-cycle" crack growth at all amplitudes of stress.
- Publication:
-
Acta Materialia
- Pub Date:
- 1998
- DOI:
- 10.1016/S1359-6454(97)00366-2
- Bibcode:
- 1998AcMat..46.1793R