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The use of an embedded chirped fibre Bragg grating sensor to monitor disbond initiation and growth in adhesively bonded composite/metal single lap joints

The use of an embedded chirped fibre Bragg grating sensor to monitor disbond initiation and growth in adhesively bonded composite/metal single lap joints
The use of an embedded chirped fibre Bragg grating sensor to monitor disbond initiation and growth in adhesively bonded composite/metal single lap joints
Chirped fibre Bragg grating (CFBG) sensors embedded within glass fibre reinforced plastic (GFRP) adherends have been used to monitor disbond initiation and growth in an adhesively bonded GFRP/aluminium alloy single lap joint. The elevated temperature curing of the adhesive used in the manufacture of the joint leads to thermal strains being generated within the GFRP and aluminium adherends. Disbond initiation and growth between the adherends during fatigue cycling causes a relaxation of the residual thermal strains within the composite adherend and perturbations (peaks or dips) in the reflection spectra from the CFBG sensor. These perturbations can be used, when the joint is unloaded, to monitor both the initiation of a disbond in the joint and to monitor the growth of the disbond with fatigue cycling.
chirped fibre bragg grating, bonded joints, disbond, structural health monitoring
1741-3567
S40-S44
Capell, T.F.
e8334144-2ff4-4559-be46-cf7f23092802
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Mohanty, L.
00a4fe8f-2016-40cc-b59a-d03aca681215
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566
Capell, T.F.
e8334144-2ff4-4559-be46-cf7f23092802
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Mohanty, L.
00a4fe8f-2016-40cc-b59a-d03aca681215
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566

Capell, T.F., Palaniappan, J., Ogin, S.L., Crocombe, A.D., Reed, G.T., Thorne, A.M., Mohanty, L. and Tjin, S.C. (2007) The use of an embedded chirped fibre Bragg grating sensor to monitor disbond initiation and growth in adhesively bonded composite/metal single lap joints. Journal of Optics A: Pure and Applied Optics, 9 (6), S40-S44. (doi:10.1088/1464-4258/9/6/S07).

Record type: Article

Abstract

Chirped fibre Bragg grating (CFBG) sensors embedded within glass fibre reinforced plastic (GFRP) adherends have been used to monitor disbond initiation and growth in an adhesively bonded GFRP/aluminium alloy single lap joint. The elevated temperature curing of the adhesive used in the manufacture of the joint leads to thermal strains being generated within the GFRP and aluminium adherends. Disbond initiation and growth between the adherends during fatigue cycling causes a relaxation of the residual thermal strains within the composite adherend and perturbations (peaks or dips) in the reflection spectra from the CFBG sensor. These perturbations can be used, when the joint is unloaded, to monitor both the initiation of a disbond in the joint and to monitor the growth of the disbond with fatigue cycling.

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More information

Published date: June 2007
Keywords: chirped fibre bragg grating, bonded joints, disbond, structural health monitoring
Organisations: Optoelectronics Research Centre, Photonic Systems Circuits & Sensors, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 50288
URI: https://eprints.soton.ac.uk/id/eprint/50288
ISSN: 1741-3567
PURE UUID: eebd99ea-d937-44fc-8265-265960be5f8a

Catalogue record

Date deposited: 12 Feb 2008
Last modified: 22 Oct 2018 16:32

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