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Strain and dynamic measurements using fiber optic sensors embedded into graphite/epoxy tubesGraphite/epoxy tubes were fabricated with embedded optical fibers to evaluate the feasibility of monitoring strains with a fiber optic technique. Resistance strain gauges were attached to the tubes to measure strain at four locations along the tube for comparison with the fiber optic sensors. Both static and dynamic strain measurements were made with excellent agreement between the embedded fiber optic strain sensor and the strain gauges. Strain measurements of 10(exp -7) can be detected with the optical phase locked loop (OPLL) system using optical fiber. Because of their light weight, compatibility with composites, immunity to electromagnetic interference, and based on the static and dynamic results obtained, fiber optic sensors embedded in composites may be useful as the sensing component of smart structures.
Document ID
19900011774
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dehart, D. W.
(Air Force Astronautics Lab. Edwards AFB, CA., United States)
Doederlein, T.
(Air Force Astronautics Lab. Edwards AFB, CA., United States)
Koury, J.
(Air Force Astronautics Lab. Edwards AFB, CA., United States)
Rogowski, R. S.
(NASA Langley Research Center Hampton, VA., United States)
Heyman, J. S.
(NASA Langley Research Center Hampton, VA., United States)
Holben, M. S., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1989
Publication Information
Publication: NASA(DOD Controls-Structures Interaction Technology 1989
Subject Category
Optics
Accession Number
90N21090
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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