Journal Published Online: 01 July 1992
Volume 20, Issue 4

An Evaluation of Strain Measuring Devices for Ceramic Composites



A 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.

Author Information

Gyekenyesi, JZ
Full-Time Research Associate for Cleveland State University at NASA Lewis Research Center, Cleveland, OH
Bartolotta, PA
NASA Lewis Research Center, Cleveland, OH
Pages: 11
Price: $25.00
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Stock #: JTE11724J
ISSN: 0090-3973
DOI: 10.1520/JTE11724J