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An evaluation of strain measuring devices for ceramic compositesA series of tensile tests were conducted on SiC/RBSN composites using different methods of strain measurement. The tests were used to find the optimum strain sensing device for use with continuous fiber reinforced ceramic matrix composites in ambient and high temperature environments. Bonded resistance strain gages were found to offer excellent performance for room temperature tests. The clip-on gage offers the same performance but significantly less time is required for mounting it to the specimen. Low contact force extensometers track the strain with acceptable results at high specimen temperatures. Silicon carbide rods with knife edges are preferred. The edges must be kept sharp. The strain measuring devices should be mounted on the flat side of the specimen. This is in contrast to mounting on the rough thickness side.
Document ID
19920063873
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gyekenyesi, John Z.
(Cleveland State University; NASA, Lewis Research Center OH, United States)
Bartolotta, Paul A.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Journal of Testing and Evaluation
Volume: 20
Issue: 4, Ju
ISSN: 0090-3973
Subject Category
Instrumentation And Photography
Accession Number
92A46497
Distribution Limits
Public
Copyright
Other

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