Fatigue of Materials III pp 23-30 | Cite as
A Study on Fatigue Crack Closure Behavior in Aluminum Alloy 7075 T6
Abstract
In this study, fatigue tests were conducted on aluminum alloy 7075-T6 to study fatigue crack growth and crack closure behavior of the material. The experiments included the determination of the crack-opening levels K op as a function of ΔK, the rate of fatigue crack growth da/dN as a function of ΔK eff , where ΔK eff (= K max -K op ) is the effective stress intensity factor range. In addition, a change in the value of Kop due to the specimen-surface removal and a crack front shape were also investigated. It was concluded that the aluminum alloy 7075-T6 exhibits plasticity-induced fatigue crack closure. The crack growth rates and crack opening behavior were in good agreement with similar results in the literature.
Keywords
Fatigue crack propagation Crack closure Effective stress intensity factorPreview
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