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Proceedings Paper

Strain monitoring and fatigue life of Bragg grating fiber optic sensors
Author(s): Nezih Mrad; Sherri Sparling; Jeremy Laliberte
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Paper Abstract

The number of advanced senors such as optical fiber sensors has exhibited tremendous growth in recent years. Optical fiber sensors, which are dielectric and chemically inert, possess characteristics that are attractive for aerospace applications. These characteristics include small size, immunity to Electromagnetic (EM) and radio frequency (RF) interference, solid state electronics reliability, geometric versatility and flexibility, and multi-parametric sensitivity. In this paper in-fiber Bragg grating fiber optic sensors are employed as strain sensors. The output of the fiber optic sensor is evaluated against currently employed sensors, resistance strain gauges and a photoelastic coating, for sensitivity, accuracy, reliability, and fatigue durability. This experimental study, which employs a tensile specimen with bonded sensors and sensors embedded between the host material and a photoelastic coating, also illustrates the reduced intrusiveness of embedded optical fiber sensors as compared to resistance strain gauges.

Paper Details

Date Published: 31 May 1999
PDF: 10 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349717
Show Author Affiliations
Nezih Mrad, National Research Council Canada (Canada)
Sherri Sparling, National Research Council Canada (Canada)
Jeremy Laliberte, Carleton Univ. (Canada)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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