Fatigue crack growth behavior of bonded composite repairs

Q. Y. Wang; T. Li; J. X. Ning

doi:10.1117/12.468827

29 May 2002 Fatigue crack growth behavior of bonded composite repairs

Q. Y. Wang, T. Li, J. X. Ning

Proceedings Volume 4537, Third International Conference on Experimental Mechanics; (2002) https://doi.org/10.1117/12.468827
Event: Third International Conference on Experimental Mechanics, 2002, Beijing, China

Abstract

In this study, fatigue crack growth (FCG) behavior of pre-cracked Al 7075/T6 substrates with bonded composite patches is investigated experimentally and analytically. Boron/epoxy patches with 2-, 4- and 6-ply are installed on Al substrates with single- side crack. Tension-tension fatigue test are also conducted on Al substrates to establish their fatigue behavior for comparing with the repaired specimens. A considerable increase in the fatigue life and a decrease in the stress intensity factor are observed as the number of plies increased. An analytical mode, based on Rose's analytical solution and Paris' power law, is developed to predict the FCG behavior of the repaired substrates. The analytical and experimental results are in good agreement.

Citation Download Citation

Q. Y. Wang, T. Li, and J. X. Ning "Fatigue crack growth behavior of bonded composite repairs", Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); https://doi.org/10.1117/12.468827

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