Estimation of the effects of plasticity and resulting crack closure during small fatigue crack growth

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Article number274456
Pages (from-to)99-115
Journal / PublicationInternational Journal of Fracture
Volume107
Issue number2
Publication statusPublished - Jan 2001
Externally publishedYes

Abstract

On the basis of a plastic-strip model and the method of singular integral equations, a closed-form analytical solution of the problem of an elastic-plastic plate containing a rectilinear fatigue crack is considered. The solution is used for the prediction of fatigue growth of 'mechanically-small' crack by accounting for reverse plastic yielding and plasticity-induced crack closure in the material. The main effects of these factors on the crack-growth rate are analyzed, and the predicted results are compared with experimental data on small fatigue-crack growth in a aluminum-lithium alloy 2091-T351 and Fe-3% Si alloy.

Research Area(s)

  • Crack closure, Plastic strip model, Singular integral equation method, Small fatigue cracks