Detection of disbond initiation and growth in a bonded joint using a chirped fibre Bragg grating sensor
Capell, Tobias F., Ogin, Stephen L., Crocombe, Andrew D., Reed, Graham T., Thorne, Anthony M., Palaniappan, Jayanthi, Tjin, Swee Chuan and Mohanty, Lipi (2007) Detection of disbond initiation and growth in a bonded joint using a chirped fibre Bragg grating sensor. In, 16th International Conference on Composite Materials (ICCM-16), Kyoto, Japan, 08 - 13 Jul 2007. 7pp.
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Description/Abstract
Chirped fibre Bragg grating (CFBG) sensors have been used to monitor the initiation and propagation of disbonds in composite/metal bonded joints. The CFBGs were embedded in the glass fibre reinforced plastic (GFRP) adherend of GFRP/aluminium single lap joints (SLJs), which were bonded at
elevated temperature. Cooling a SLJ to room temperature resulted in a residual elastic strain due to the different coefficients of thermal expansion of the adherends. SLJs were fatigue loaded, with the CFBG sensor being interrogated at intervals using a broadband light source and a spectrum analyser when the SLJ was in an unloaded state. It was found that the relaxation of the elastic strain due to disbonding caused perturbations in the reflected spectrum from the CFBG sensors
which enabled the position of the disbond front to be determined. The experimental results have been modelled using a combination of finite-element analysis and commercial
software for predicting FBG spectra.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences > Fluid-Structure Interactions |
| Item ID: | 50656 |
| Date Deposited: | 10 Mar 2008 |
| Last Modified: | 02 Mar 2012 13:09 |
| Contributors: | Capell, Tobias F. (Author) Ogin, Stephen L. (Author) Crocombe, Andrew D. (Author) Reed, Graham T. (Author) Thorne, Anthony M. (Author) Palaniappan, Jayanthi (Author) Tjin, Swee Chuan (Author) Mohanty, Lipi (Author) |
| Date: | July 2007 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/50656 |
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