The University of Southampton
University of Southampton Institutional Repository

Changes in the reflected spectra of embedded chirped fibre Bragg gratings used to monitor disbonding in bonded composite joints

Changes in the reflected spectra of embedded chirped fibre Bragg gratings used to monitor disbonding in bonded composite joints
Changes in the reflected spectra of embedded chirped fibre Bragg gratings used to monitor disbonding in bonded composite joints
Recent work has outlined a method for health monitoring the structural integrity of adhesively bonded composite joints based on the use of a chirped fibre Bragg grating (CFBG) embedded within an adherend, but not within the glue-line. In this paper, the reflected CFBG spectra for disbonds of different lengths have been predicted with the aid of a finite-element model of the strain field resulting from a disbond and commercially available software for predicting the reflected spectra of fibre Bragg grating sensors. The modelling shows the relationship between the position of the disbond front and the dip in the reflected spectrum which moves to higher wavelengths as the disbond extends. These results enable visual observations of the disbond front in the optically transparent joint to be compared with the CFBG results, showing that the sensor can determine the disbond front position to within a few millimetres. For other bonded structures, this resolution is likely to be determined largely by the adherend materials and sensor position.
adhesive joints, disbonding, finite-element analysis (fea), non-destructive testing
0266-3538
2847-2853
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Wang, H.
d23f04f1-a300-4744-bd98-2df77c7047df
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Rech, Y.
c923e81d-eaca-4522-b7e7-4601906c2644
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566
Palaniappan, J.
b5cef093-6621-4904-9b47-1ad11c954139
Wang, H.
d23f04f1-a300-4744-bd98-2df77c7047df
Ogin, S.L.
6067d51e-8785-4e60-96a6-05038f6a0d31
Thorne, A.M.
4a7e0ab8-c6c3-406d-8958-5bc6f990d611
Reed, G.T.
ca08dd60-c072-4d7d-b254-75714d570139
Crocombe, A.D.
ecc8a655-260f-4625-90de-2df89503094e
Rech, Y.
c923e81d-eaca-4522-b7e7-4601906c2644
Tjin, S.C.
2986cfba-d4ac-4c64-95d3-84093745a566

Palaniappan, J., Wang, H., Ogin, S.L., Thorne, A.M., Reed, G.T., Crocombe, A.D., Rech, Y. and Tjin, S.C. (2007) Changes in the reflected spectra of embedded chirped fibre Bragg gratings used to monitor disbonding in bonded composite joints. Composites Science and Technology, 67 (13), 2847-2853. (doi:10.1016/j.compscitech.2007.01.028).

Record type: Article

Abstract

Recent work has outlined a method for health monitoring the structural integrity of adhesively bonded composite joints based on the use of a chirped fibre Bragg grating (CFBG) embedded within an adherend, but not within the glue-line. In this paper, the reflected CFBG spectra for disbonds of different lengths have been predicted with the aid of a finite-element model of the strain field resulting from a disbond and commercially available software for predicting the reflected spectra of fibre Bragg grating sensors. The modelling shows the relationship between the position of the disbond front and the dip in the reflected spectrum which moves to higher wavelengths as the disbond extends. These results enable visual observations of the disbond front in the optically transparent joint to be compared with the CFBG results, showing that the sensor can determine the disbond front position to within a few millimetres. For other bonded structures, this resolution is likely to be determined largely by the adherend materials and sensor position.

Full text not available from this repository.

More information

Published date: October 2007
Keywords: adhesive joints, disbonding, finite-element analysis (fea), non-destructive testing
Organisations: Optoelectronics Research Centre, Photonic Systems Circuits & Sensors, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 50291
URI: https://eprints.soton.ac.uk/id/eprint/50291
ISSN: 0266-3538
PURE UUID: 86ae1915-0c80-4e20-ba58-aab280f5cc59

Catalogue record

Date deposited: 12 Feb 2008
Last modified: 17 Oct 2018 16:31

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×