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RESEARCH PAPERS

Mechanical Behavior of Fiber-Reinforced SiC/RBSN Ceramic Matrix Composites: Theory and Experiment

[+] Author and Article Information
A. Chulya

Department of Civil Engineering, Cleveland State University, Cleveland, OH 44115

J. P. Gyekenyesi

Structural Integrity Branch, NASA Lewis Research Center, Cleveland, OH 44135

R. T. Bhatt

Propulsion Directorate, U.S. Army Aviation Systems Command, NASA Lewis Research Center, Cleveland, OH 44135

J. Eng. Gas Turbines Power 115(1), 91-102 (Jan 01, 1993) (12 pages) doi:10.1115/1.2906691 History: Received March 04, 1991; Online April 24, 2008

Abstract

The mechanical behavior of continuous fiber-reinforced SiC/RBSN 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 techniques throughout the loading history. Effects of fiber/matrix interface debonding (splitting) parallel to the fibers are discussed. Statistical failure behavior of fibers is also observed, especially when the interface is weak. Micromechanical models incorporating 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 analytic predictions.

Copyright © 1993 by The American Society of Mechanical Engineers
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