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Reflected spectra prediction for chirped fibre Bragg gratings used for disbond detection in composite/composite bonded joints

Reflected spectra prediction for chirped fibre Bragg gratings used for disbond detection in composite/composite bonded joints
Reflected spectra prediction for chirped fibre Bragg gratings used for disbond detection in composite/composite bonded joints
In this paper it is shown that a chirped fibre Bragg grating sensor embedded within a composite adherend can be used to monitor disbond initiation and propagation in an adhesively bonded single lapjoint. Characteristic changes in the reflected spectra from the sensor indicate both disbond initiation and the current position of the disbond front to within about 2 mm (a distance which depends on adherend material and sensor position in relation to the adhesive bondline). When the sensor extends the full overlap length, disbond initiation from either end of the overlap can be monitored. The results have been modelled using a combination of finite-element analysis and commercial software for predicting FBG spectra; the predicted spectra are in very good agreement with experiment. The CFBG sensor technique could provide the basis for monitoring a wide range of bonded joints and structures where one adherend is a composite material.
Adhesive bonded joints, disbond, chirped fibre Bragg grating
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Capell, T.F.
e8334144-2ff4-4559-be46-cf7f23092802
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566
Mohanty, L.
00a4fe8f-2016-40cc-b59a-d03aca681215
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Capell, T.F.
e8334144-2ff4-4559-be46-cf7f23092802
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566
Mohanty, L.
00a4fe8f-2016-40cc-b59a-d03aca681215

Palaniappan, J., Ogin, S.L., Capell, T.F., Thorne, A.M., Reed, G.T., Crocombe, A.D., Tjin, S.C. and Mohanty, L. (2007) Reflected spectra prediction for chirped fibre Bragg gratings used for disbond detection in composite/composite bonded joints. 16th International Conference on Composite Materials (ICCM-16), Kyoto, Japan. 08 - 13 Jul 2007. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper it is shown that a chirped fibre Bragg grating sensor embedded within a composite adherend can be used to monitor disbond initiation and propagation in an adhesively bonded single lapjoint. Characteristic changes in the reflected spectra from the sensor indicate both disbond initiation and the current position of the disbond front to within about 2 mm (a distance which depends on adherend material and sensor position in relation to the adhesive bondline). When the sensor extends the full overlap length, disbond initiation from either end of the overlap can be monitored. The results have been modelled using a combination of finite-element analysis and commercial software for predicting FBG spectra; the predicted spectra are in very good agreement with experiment. The CFBG sensor technique could provide the basis for monitoring a wide range of bonded joints and structures where one adherend is a composite material.

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More information

Published date: July 2007
Venue - Dates: 16th International Conference on Composite Materials (ICCM-16), Kyoto, Japan, 2007-07-08 - 2007-07-13
Keywords: Adhesive bonded joints, disbond, chirped fibre Bragg grating
Organisations: Optoelectronics Research Centre, Photonic Systems Circuits & Sensors, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 50655
URI: https://eprints.soton.ac.uk/id/eprint/50655
PURE UUID: bf9d8c3d-4bb5-4bf5-a399-da937f446f50

Catalogue record

Date deposited: 10 Mar 2008
Last modified: 17 Oct 2018 16:31

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