Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 32, Issue 9, Pages 1503-1510Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2009.10.001
Keywords
Fatigue threshold; Dislocation; Crack closure; Fatigue crack propagation
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At low crack propagation rate in metals and alloys the discrete nature of plasticity is essential to understand the fatigue phenomena. A short overview of the different types of performed discrete dislocation simulations of cyclically loaded cracks and their essential results are presented. The discrete dislocation mechanics deliver the changes of the stresses and displacement during cyclic loading. However, it does not give directly the crack propagation rate In the simulations one has to assume a propagation mechanism A comparison implies two things. the different simulations, the experimentally observed crack growth behaviour and crystallographic features will be used to show, which crack propagation mechanism is more appropriate in which case (C) 2009 Published by Elsevier Ltd.
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