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Strain monitoring using distributed fiber optic sensors embedded in carbon fiber composites
Author(s): Sasi Jothibasu; Yang Du; Sudharshan Anandan; Gurjot S. Dhaliwal; Amardeep Kaur; Steve E. Watkins; K. Chandrashekhara; Jie Huang
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Paper Abstract

A distributed fiber optic strain sensor based on Rayleigh backscattering, embedded in a fiber-reinforced polymer composite, has been demonstrated. The optical frequency domain reflectometry (OFDR) technique was used to analyze the backscattered signal. The shift in the Rayleigh backscattered spectrum (RBS) was observed to be linear to the change in strain of the composite material. The sensor (standard single-mode fiber) was embedded between the layers of the composite laminate. A series of tensile loads were applied to the laminate using an Instron testing machine, and the corresponding strain distribution of the laminate was measured. The results show a linear response indicating a seamless integration of the optic fiber in the composite material and a good correlation with the electrical-resistance strain gauge results. In this study, distributed strain measurements in a composite laminate were successfully obtained using an embedded fiber optic sensor.

Paper Details

Date Published: 27 March 2018
PDF: 9 pages
Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 105980I (27 March 2018); doi: 10.1117/12.2296636
Show Author Affiliations
Sasi Jothibasu, Missouri Univ. of Science and Technology (United States)
Yang Du, Missouri Univ. of Science and Technology (United States)
Sudharshan Anandan, Missouri Univ. of Science and Technology (United States)
Gurjot S. Dhaliwal, Missouri Univ. of Science and Technology (United States)
Amardeep Kaur, Missouri Univ. of Science and Technology (United States)
Steve E. Watkins, Missouri Univ. of Science and Technology (United States)
K. Chandrashekhara, Missouri Univ. of Science and Technology (United States)
Jie Huang, Missouri Univ. of Science and Technology (United States)


Published in SPIE Proceedings Vol. 10598:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018
Hoon Sohn, Editor(s)

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