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Proceedings Paper

Impact detection in carbon fiber reinforced polymer composites using in-fiber Bragg gratings
Author(s): Martin J. O'Dwyer; N. D. Dykes; Stephen W. James; Ralph P. Tatam; P. E. Irving
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Paper Abstract

In this paper in-fiber Bragg gratings (IFBGs) were embedded in epoxy resin carbon fiber composite coupons, and these coupons were subjected to transient events such as impacts. The IFBGs were demodulated using a fiber Fabry-Perot interferometer and an interference filter. In addition to the IFBGs, two other types of sensors were used. These were a force transducer mounted in the impact rig, and resistive foil strain gauges mounted on the surface of the test coupons. Comparisons of the data obtained using these sensors have been made. The IFBGs have successfully survived the impacts and have been used to record strain transients that characterize typical fracture events.

Paper Details

Date Published: 6 July 1998
PDF: 8 pages
Proc. SPIE 3479, Laser Interferometry IX: Applications, (6 July 1998); doi: 10.1117/12.316449
Show Author Affiliations
Martin J. O'Dwyer, Cranfield Univ. (United Kingdom)
N. D. Dykes, Cranfield Univ. (United Kingdom)
Stephen W. James, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)
P. E. Irving, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 3479:
Laser Interferometry IX: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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