Fatigue and Crack-growth Analyses under Giga-cycle Loading on Aluminum Alloys

Stress-life (S-N) data from the literature on uniaxial-loaded specimens made of 2024-T351 aluminum alloy and subject to constant-amplitude loading are used to support the crack-growth concept to calculate the fatigue behavior into the giga-cycle fatigue regime using initial flaw sizes consistent wit...

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Bibliographic Details
Published inProcedia engineering Vol. 101; pp. 339 - 346
Main Author Newman, J.C.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2015
Subjects
aluminum alloy
crack closure
cracks
fatigue
fatigue-crack growth
crack closure
fatigue
cracks
fatigue-crack growth
aluminum alloy
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ISSN1877-7058
1877-7058
DOI10.1016/j.proeng.2015.02.041

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Summary:Stress-life (S-N) data from the literature on uniaxial-loaded specimens made of 2024-T351 aluminum alloy and subject to constant-amplitude loading are used to support the crack-growth concept to calculate the fatigue behavior into the giga-cycle fatigue regime using initial flaw sizes consistent with micro-structural discontinuities in the material. Fatigue test data from the literature on uniaxial-loaded specimens made 7075-T6 under superimposed low- (5Hz) and ultra-high- (20kHz) cycle (sine-on-sine) fatigue loading are used to study the crack-growth concept for predicting fatigue behavior under giga-cycle fatigue conditions. Fatigue behavior under giga-cycle loading conditions was modelled fairly well with the crack-growth concept.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2015.02.041