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Nondestructive evaluation of composites by optical time domain reflectometry in imbedded optical fibersThe use of imbedded optical fibers to obtain dynamic two-dimensional dynamic-strain measurements by optical time-domain reflectometry (OTDR) in laminated composites is described. The fundamental principles of OTDR are reviewed, and the basic parameters resolution and dynamic range are defined. Results of OTDR measurements on 30-cm square plates of 0/90/90/0-deg graphite epoxy composite with type 1506 optical fibers imbedded in a serpentine pattern between (and parallel to the reinforcing fibers of) the 90-deg plates are presented in graphs and briefly characterized. It is estimated that processing the OTDR data with simple techniques could permit strain detection of the order 0.00001 at sampling rates as high as 1/ms.
Document ID
19860059099
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Claus, R. O.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Jackson, B. S.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
May, R. G.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Instrumentation And Photography
Accession Number
86A43837
Distribution Limits
Public
Copyright
Other

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