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Proceedings Paper

Transverse loading effects on embedded Bragg fiber system
Author(s): Jill Bennett; Mahmoud A. El-Sherif; Mark E. Froggatt
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Paper Abstract

Optical fibers imprinted with a Bragg grating, a periodic change in the refractive index of the core of the fiber, can be used as strain gages in structural health monitoring. It is well known that fiber Bragg grating (FBG) structures can be applied as optical strain gages with very high sensitivity and reasonable accuracy. This application has been confirmed through numerous publications on the effect of axial loads on FBG structures. The FBG structure can easily be calibrated as an axial strain sensor. There are currently some trial applications ofthese optical strain gauges in bridge construction. However, using these FBG structures as embedded sensors has raised questions about sensor accuracy and measurements because of the Poisson's effect and/or application under multi-axial stress states. Therefore, the objective of this research was to study the effect of transverse loads on FBG structures for a better understanding of the interaction of the structure and the embedded Bragg fiber sensor output.

Paper Details

Date Published: 1 March 2001
PDF: 11 pages
Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); doi: 10.1117/12.417428
Show Author Affiliations
Jill Bennett, Drexel Univ. and NASA Langley Research Ctr. (United States)
Mahmoud A. El-Sherif, Drexel Univ. (United States)
Mark E. Froggatt, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 4204:
Fiber Optic Sensor Technology II
Brian Culshaw; Michael A. Marcus; Brian Culshaw; James A. Harrington; Michael A. Marcus; Mohammed Saad, Editor(s)

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