AN ARGUMENT FOR A CYCLE-BY-CYCLE PROPAGATION OF FATIGUE CRACKS AT SMALL STRESS INTENSITY RANGES

Authors
RIEMELMOSER FO PIPPAN R STUWE HP
Citation
Fo. Riemelmoser et al., AN ARGUMENT FOR A CYCLE-BY-CYCLE PROPAGATION OF FATIGUE CRACKS AT SMALL STRESS INTENSITY RANGES, Acta materialia, 46(5), 1998, pp. 1793-1799
Citations number
26
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Acta materialia → ACNP
ISSN journal
13596454
Volume
46
Issue
5
Year of publication
1998
Pages
1793 - 1799
Database
ISI
SICI code
1359-6454(1998)46:5<1793:AAFACP>2.0.ZU;2-Z
Abstract
A model is presented in which the plastic strains around a growing fat igue crack are discretized in the form of geometrically necessary disl ocations. The model explains the existence of a threshold and the near threshold regime. It also explains the minimum value of striation spa cing with decreasing amplitude of stress intensity. The model correspo nds to a ''cycle-by-cycle'' crack growth at all amplitudes of stress. (C) 1998 Acta Metallurgica Inc.