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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)

ISSN:2141-7016

Article Title: MONITORING OF STRUCTURAL INTEGRITY OF COMPOSITE STRUCTURES BY EMBEDDED OPTICAL FIBER SENSORS
by Albert J. Osei

Abstract:
In-service structural health monitoring of engineering structures has assumed a significant role in assessing their safety and integrity. Fiber Bragg grating (FBG) sensors have emerged as a reliable, in-situ, non-destructive tool for monitoring, diagnostics and control in civil and aerospace structures. They can be used to measure a multitude of parameters like strain, temperature, pressure and chemical and biological effects of the environment. The versatility of Fiber Bragg grating sensors represents a key advantage over other technologies in the structural sensing field. In this study, Bragg gratings written into a Germanium doped optical fiber are embedded in carbon-epoxy laminates to measure the tensile strain in the composite material. Strain measurements from a more conventional electro-mechanical instrumentation are compared to those from the Bragg sensors and an excellent agreement between the two measurements has been verified. The experimental results of this study indicate that fiber optic Bragg grating sensors, integrated with composites, have potential applications for monitoring the structural integrity of composite structures. .
Keywords: composite, Bragg sensors, embedded FBG, carbon-epoxy, tensile strain
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ISSN: 2141-7016

Editor in Chief.

Prof. Gui Yun Tian
Professor of Sensor Technologies
School of Electrical, Electronic and Computer Engineering
University of Newcastle
United Kingdom

 

 

Copyright © Journal of Emerging Trends in Engineering and Applied Sciences 2010