Effects of crack closure on fatigue crack-growth predictions for 2024-T351 aluminum alloy panels under spectrum loading

Yamada, Yoshiyuki; Lacy, Thomas E.; Newman, J. C.; Smith, Bert L.; Kumar, B.

doi:10.1016/j.ijfatigue.2006.10.026

Cited by 13 publications

(2 citation statements)

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“…A material with lower ductility normally has longer fatigue life because of the differences in the localized deformation process. The load sequence effect on fatigue life can also be affected by the load interaction that occurred in cycles, which induced plasticity at the crack tip during the crack propagation [34][35][36]. Plasticity is related to ductility, and thus, the load sequence effect on fatigue life was also affected by the ductility of the aluminium alloy.…”

Section: Methodsmentioning

confidence: 99%

Influence of mechanical properties on load sequence effect and fatigue life of aluminium alloy

et al. 2017

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Most of the structural components in real applications are subjected to variable amplitude loading. The load sequence may have a significant effect on the number of cycles to failure. However, the relationship between the mechanical behaviour of material and the load sequence effects has scarcely been reported. Therefore, this paper discusses the influence of mechanical properties on the load sequence effect and fatigue life behaviour of aluminium alloys AA6061 and AA7075. Tensile and fatigue tests were performed according to ASTM E8 and ASTM E466, respectively. The variable amplitude loading signal was obtained from the engine mount bracket of an automobile in normal driving conditions. Constant amplitude loading, and high-to-low and low-tohigh spectrum loadings were derived from the variable amplitude loading to assess the effects of load sequence on fatigue life. The results showed that AA7075 has better fatigue life properties compared to AA6061. Both alloys were significantly influenced by load sequences. The number of cycles to failure for low-to-high spectrum loading is about 56 % higher than the CAL for AA6061 compared to about 82 % higher than the CAL for AA7075. Thus, it can be concluded that the load sequence effect was more pronounced on AA7075 compared to AA6061.

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Section: Methodsmentioning

confidence: 99%

Influence of mechanical properties on load sequence effect and fatigue life of aluminium alloy

et al. 2017

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“…The authors tried to minimize this difficulty through attention to analytical concepts as well as classification of FCG model based on load interaction effect. In this case, four approaches are identified, which are based on crack closure effects [3,4], behind the crack, statistical and probabilistic models [5,6]. Models based on calculation of equivalent stress intensity range [7], and models based on calculation of residual stress in the crack tip [8,9].…”

Section: Introductionmentioning

confidence: 99%

Analytical Concepts for Recent Development in Fatigue Crack Growth under Variable Amplitude Loading. Part I: Qualitative Interpretation

Abdullah

Hafezi

Abdullah

2011

KEM

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Understanding effective parameters in fatigue crack growth (FCG) model under variable amplitude loading (VAL) is of eminent importance theoretically as well as experimentally. In response to this necessity, a systematic study of different analytical concepts and loading sequences in order to gain a practical framework has been proposed. The theoretical background related to the fatigue life prediction by using FCG model has been presented. This has shown the rationale of why we need to calculate local stress-strain in the crack tip in developing FCG models which is the main subject of this research.

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Elastic-Plastic Fatigue Crack Growth

Vormwald

2013

Advanced Methods of Fatigue Assessment

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Effects of crack closure on fatigue crack-growth predictions for 2024-T351 aluminum alloy panels under spectrum loading

Cited by 13 publications

References 10 publications

Influence of mechanical properties on load sequence effect and fatigue life of aluminium alloy

Influence of mechanical properties on load sequence effect and fatigue life of aluminium alloy

Analytical Concepts for Recent Development in Fatigue Crack Growth under Variable Amplitude Loading. Part I: Qualitative Interpretation

Elastic-Plastic Fatigue Crack Growth

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