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Monitoring crack growth in a DCB test using a surface-bonded chirped FBG sensor

Ogin, SL, Sanderson, AR, Crocombe, AD, Gower, MRL, Lee, RJ, Tjin, SC and Lin, B (2011) Monitoring crack growth in a DCB test using a surface-bonded chirped FBG sensor In: 18TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS, 2011-08-21 - 2011-08-26, Jeju, Korea,.

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Abstract

Delamination growth within transparent, unidirectionally reinforced glass fibre/epoxy doublecantilever beam (DCB) specimens has been monitored using a surface-mounted chirped fibre Bragg grating (CFBG) sensor. The specimens were tested using a constant displacement rate, with the delamination length being measured using (i) surface-mounted CFBG sensors, (ii) in situ photography, and (iii) surface-mounted strain gauges. The DCB specimens showed characteristics typical of such material, with the development of extensive fibre bridging and pronounced R-curve behaviour. A distinct perturbation in the reflected spectra, when monitoring the delamination growth using the CFBG sensors, was indicative of the location of the delamination front during the test. The in situ photographs and the surface strain measurements provided by the strain gauges were used to predict the experimentally determined CFBG reflected spectra, with good agreement between prediction and experiment. These results enabled the delamination length to be measured using the CFBG sensor technique to within 4 mm over the 60 mm sensor length.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
AuthorsEmailORCID
Ogin, SLUNSPECIFIEDUNSPECIFIED
Sanderson, ARUNSPECIFIEDUNSPECIFIED
Crocombe, ADUNSPECIFIEDUNSPECIFIED
Gower, MRLUNSPECIFIEDUNSPECIFIED
Lee, RJUNSPECIFIEDUNSPECIFIED
Tjin, SCUNSPECIFIEDUNSPECIFIED
Lin, BUNSPECIFIEDUNSPECIFIED
Date : 21 August 2011
Depositing User : Symplectic Elements
Date Deposited : 14 Oct 2014 12:35
Last Modified : 14 Oct 2014 13:33
URI: http://epubs.surrey.ac.uk/id/eprint/737195

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