Fail-safe sensor for structural health monitoring

Annelene F. Dethlefsen; Henry C. H. Li; Claire E. Davis; Paul R. Stoddart

doi:10.1117/12.785925

16 May 2008 Fail-safe sensor for structural health monitoring

Annelene F. Dethlefsen, Henry C. H. Li, Claire E. Davis, Paul R. Stoddart

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 700425 (2008) https://doi.org/10.1117/12.785925
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

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.

Citation Download Citation

Annelene F. Dethlefsen, Henry C. H. Li, Claire E. Davis, and Paul R. Stoddart "Fail-safe sensor for structural health monitoring", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700425 (16 May 2008); https://doi.org/10.1117/12.785925

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