INVESTIGATION OF A GROWING FATIGUE-CRACK BY MEANS OF A DISCRETE DISLOCATION MODEL

Authors
RIEMELMOSER FO PIPPAN R
Citation
Fo. Riemelmoser et R. Pippan, INVESTIGATION OF A GROWING FATIGUE-CRACK BY MEANS OF A DISCRETE DISLOCATION MODEL, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 234, 1997, pp. 135-137
Citations number
6
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
234
Year of publication
1997
Pages
135 - 137
Database
ISI
SICI code
0921-5093(1997)234:<135:IOAGFB>2.0.ZU;2-T
Abstract
A growing fatigue crack under constant load amplitudes is described by means of dislocation mechanics. It is shown that the dislocations are arranged in slip bands which are separated by large dislocation free regions. The accumulation of the dislocations in the wake of the crack produces compressive stresses near the crack tip. During the loading history the closure stress intensity builds up and the crack growth ra tio decreases until steady-state conditions are reached. (C) 1997 Else vier Science S.A.