Prediction of Fatigue Crack Growth of Aged Hardening Al-Alloys under Variable Amplitude Loading

Abstract:

In this investigation, variable amplitude loading effect was studied on aged hardening Al-alloys in series 2000 and 7000. Generalised Willenborg model was used in order to show loading interaction effects (overload effects). Variable amplitude loading under different form of spectrum has affected highly the fatigue life and fatigue crack growth rates. Fatigue lives were increased and fatigue crack growth rates (FCGRs) were decreased in increasing of overload ratio in single overload case. In application of overload band, the fatigue lives and FCGRs were affected by band overload and R-ratio of them when level in FCGRs was increased.

• Periodical: Advanced Materials Research (Volumes 891-892)
• Pages: 1729-1735
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.891-892.1729
• Online since: March 2014
• Authors: Mustapha Benachour*, Boumedienne Zeggai, Nadjia Benachour, Mohamed Benguediab, Abdelkader Belmokhtar
• Keywords: Aged Hardening Al-Alloys, Fatigue Crack, Generalized Willenborg Model, Overload, Overload Ratio, Retardation

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