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Proceedings Paper

Designing, manufacturing, and testing of embedded EFPI strain sensor for damage detection of smart composite beams
Author(s): Lay May Sim; Gang Zhou
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Paper Abstract

Designing a fiber optic sensor in the development of a real-time damage detection and evaluation system is important for providing reliable results. This paper describes the manufacturing and implementation of an Extrinsic Fabry-Perot Interferometer (EFPI) strain sensor for the non-destructive quantitative evaluation of carbon fiber reinforced composites. The EPFI strain sensors were examined for their integrity and performance. The integrity of the sensors was assessed experimentally by determining the bending strength of the glass tube, which was used in the fabrication of the sensor. Further validations on the survival of the sensors when embedded were also carried out with the application of the modified classical lamination theory (CLT). The sensor performance was examined extensively by either bonded on the surface or embedded in the tensile region of simple quasi-isotropic (QI) composite beams. These smart beams were loaded quasi-statically in three-point bend and cantilever loading The EFPI strain sensors have shown to surface a maximum tensile strain of up to 0.8%, which was adequate and reliable for strain measurements in the current system. The understanding of the EFPI strain sensors behaviour have paved way for the success in achieving a fiber optic strain sensor based damage detection and evaluation system (FODDAS).

Paper Details

Date Published: 12 April 2005
PDF: 6 pages
Proc. SPIE 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, (12 April 2005); doi: 10.1117/12.621417
Show Author Affiliations
Lay May Sim, Singapore Institute of Manufacturing Technology (Singapore)
Gang Zhou, Loughborough Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5852:
Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics
Chenggen Quan; Fook Siong Chau; Anand Asundi; Brian Stephen Wong; Chwee Teck Lim, Editor(s)

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