Abstract:
This presentation discusses the development of an in-situ ultrasonic evaluation technique to characterize damage initiation and accumulation in advanced ceramic matrix composites (CMC). This test system was used to evaluate the performance of a CMC under tensile and sustained loading conditions. During the tests, changes in the specimen response was monitored using conventional extensometry, and through-transmitted surface and longitudinal waves. Several tests were periodically interrupted to document evidence of damage progression using optical photography and dye penetrants. The presentation will also discuss the correlation between the optically observed damage features and the changes in wave characteristics such as wave speed, frequency content, and amplitude.
(Ref. SXVIII-027-97)
Source: NDE of Ceramics '97 May 4-7, Symposium on Nondestructive Evaluation of Ceramics
at the American Ceramic Society 99th Annual Meeting, Cincinnati, Ohio.
Buying the Symposium Proceedings from the American Ceramic Society.
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