Mechanical behavior of fiber reinforced SiC/RBSN ceramic matrix composites - Theory and experimentThe mechanical behavior of continuous fiber reinforced SiC/RBSN (Reaction Bonded Silicon Nitride) composites with various fiber contents is evaluated. Both catastrophic and noncatastrophic failures are observed in tensile specimens. Damage and failure mechanisms are identified via in-situ monitoring using NDE (nondestructive evaluation) techniques throughout the loading history. Effects of fiber/matrix interface debonding (splitting) parallel to fibers are discussed. Statistical failure behavior of fibers is also observed, especially when the interface is weak. Micromechanical models incorproating residual stresses to calculate the critical matrix cracking strength, ultimate strength, and work of pull-out are reviewed and used to predict composite response. For selected test problems, experimental measurements are compared to analytical predictions.
Document ID
19920033005
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chulya, Abhisak (NASA Lewis Research Center; Cleveland State University OH, United States)
Gyekenyesi, John P. (NASA Lewis Research Center Cleveland, OH, United States)
Bhatt, Ramakrishna T. (NASA Lewis Research Center; U.S. Army, Propulsion Directorate, Cleveland OH, United States)