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Adhesively-bonded Patch Repair with Composites

Pandey, PC and Kumar, S (2010) Adhesively-bonded Patch Repair with Composites. In: Defence Science Journal, 60 (3). pp. 320-329.

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Official URL: http://publications.drdo.gov.in/ojs/index.php/dsj/...

Abstract

Adhesively-bonded composite patch repairs over cracked or corrosion-damaged metallic aircraft structures have shown great promise for extending life of ageing structures. This study presents the numerical investigation into the interface behaviour of adhesively-bonded cracked aluminum alloy substrate patched with fibre-reinforced composite material. The adhesive is modelled as an elasto-plastic bilinear material to characterise the debond behaviour, while the defective substrate is regarded as linear elastic continuum. Two typical patch shapes were selected based on information available in the literature. Geometric and material nonlinear analyses for square and octagonal patches were performed to capture peel and shear stresses developed between the substrate and the patch to examine the possibility of interface delamination/debonding. Parametric studies on adhesive thickness and patch thickness were carried out to predict their infuence on damage tolerance of repaired structures.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Defence Research & Development Organisation, India.
Department/Centre: Others
Date Deposited: 29 Dec 2010 08:04
Last Modified: 29 Dec 2010 08:04
URI: http://eprints.iisc.ernet.in/id/eprint/28886

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