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Proceedings Paper

Fatigue crack growth behavior of bonded composite repairs
Author(s): Q. Y. Wang; T. Li; J. X. Ning
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Paper 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.

Paper Details

Date Published: 29 May 2002
PDF: 4 pages
Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); doi: 10.1117/12.468827
Show Author Affiliations
Q. Y. Wang, Sichuan Univ. (China)
T. Li, Southwest Univ. of Science and Technology (China)
J. X. Ning, Sichuan Univ. (China)

Published in SPIE Proceedings Vol. 4537:
Third International Conference on Experimental Mechanics
Xiaoping Wu; Yuwen Qin; Jing Fang; Jingtang Ke, Editor(s)

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