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Proceedings Paper

Fail-safe sensor for structural health monitoring
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Paper Abstract

This paper introduces the concept of a fail-safe sensor to monitor the structural health of a composite repair. The low-cost fiber Bragg grating (FBG) sensor system consists of a light source, two specially designed fiber Bragg gratings and a photodiode detector. This system is applied to a typical bonded composite scarf joint often employed in aerospace structures. A finite element model is developed to assess the change in strain distribution as the result of a structural debond. The proposed monitoring system will be validated through an experimental investigation.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700425 (16 May 2008); doi: 10.1117/12.785925
Show Author Affiliations
Annelene F. Dethlefsen, Swinburne Univ. of Technology (Australia)
Henry C. H. Li, RMIT Univ. (Australia)
Claire E. Davis, Defence Science and Technology Organisation (Australia)
Paul R. Stoddart, Swinburne Univ. of Technology (Australia)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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