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Residual strength and fatigue life assessment of composite patch repaired specimens

Rao, VV and Singh, R and Malhotra, SK (1999) Residual strength and fatigue life assessment of composite patch repaired specimens. In: Composites Part B: Engineering, 30 (6). pp. 621-627.

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Official URL: http://dx.doi.org/10.1016/S1359-8368(99)00024-4


Design, analysis and technology for the integrity enhancement of damaged or underdesigned structures continues to be an engineering challenge. Bonded composite patch repairs to metallic structures is receiving increased attention in the recent years. It offers various advantages over rivetted doubler, particularly for airframe repairs. This paper presents an experimental investigation of residual strength and fatigue crack-growth life of an edge-cracked aluminium specimen repaired using glass epoxy composite patch. The investigation begins with the evaluation of three different surface treatments from bond strength viewpoint. A simple thumb rule formula is employed to estimate the patch size. Cracked and repaired specimens are tested under static and fatigue loading. The patch appears to restore the original strength of the undamaged specimen and enhance the fatigue crack growth life by an order of magnitude. (C) 1999 Elsevier Science Ltd. All rights reserved.

Item Type: Journal Article
Publication: Composites Part B: Engineering
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Fatigue life assessment
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 29 Jun 2011 05:36
Last Modified: 29 Jun 2011 05:36
URI: http://eprints.iisc.ac.in/id/eprint/38750

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