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dc.contributor.authorBorrego, L. P.-
dc.contributor.authorFerreira, J. M.-
dc.contributor.authorCosta, J. M.-
dc.identifier.citationInternational Journal of Fatigue. 30:10-11 (2008) 1787-1796en_US
dc.description.abstractFatigue crack propagation tests under high-low and low-high block loading sequences have been performed in aluminium alloy specimens. The tests were carried out at constant [Delta]K conditions. Two stress ratios were analysed: R = 0.05 and R = 0.4. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post load step behaviour is discussed in terms of the load change magnitude, [Delta]K baseline levels and stress ratio. The crack closure level was obtained and compared with the crack growth transients. A good agreement between experimental and predicted crack growth rates is obtained when the partial crack closure effect is properly taken into account. Therefore, plasticity-induced crack closure plays an important role on the load interaction effects observed in aluminium alloys.en_US
dc.subjectAluminium alloyen_US
dc.subjectFatigue crack growthen_US
dc.subjectBlock loadingen_US
dc.subjectCrack closureen_US
dc.subjectPartial crack closureen_US
dc.titlePartial crack closure under block loadingen_US
item.fulltextCom Texto completo-
item.grantfulltextopen- for Mechanical Engineering-
Appears in Collections:FCTUC Eng.Mecânica - Artigos em Revistas Internacionais
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