Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/102196
Title: Plasticity induced closure under variable amplitude loading in AlMgSi aluminum alloys
Authors: Borrego, L. F. P. 
Costa, J. D. 
Ferreira, J. A. M. 
Keywords: block loading; Damage Tolerance Overloads; partial crack closure; plasticity-induced crack closure
Issue Date: 2017
Project: FCT - PTDC/EMS-PRO/3148/2012 co-financed by FEDER, through the Operational Factors for Competitiveness Programme of the QREN with reference COMPETE: FCOMP-01-0124-FEDER-029112 
Serial title, monograph or event: Procedia Structural Integrity
Volume: 5
Abstract: Fatigue crack propagation tests under peak overloads, as well as High-Low and Low-High block loading sequences have been performed in aluminum alloy specimens. The observed transient crack closure level is discussed in terms of loading sequence, load change magnitude and ΔK baseline levels. The crack closure level is 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 aluminum alloys.
URI: http://hdl.handle.net/10316/102196
ISSN: 24523216
DOI: 10.1016/j.prostr.2017.07.072
Rights: openAccess
Appears in Collections:I&D CEMMPRE - Artigos em Revistas Internacionais

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