RESEARCH PAPERS: Gas Turbines: Manufacturing and Materials

Stiffness Degradation in Metal Matrix Composites Caused by Thermomechanical Fatigue Loading

[+] Author and Article Information
S. Aksoy

Textron Lycoming, Stratford, CT 06497

J. Eng. Gas Turbines Power 116(3), 616-621 (Jul 01, 1994) (6 pages) doi:10.1115/1.2906864 History: Received March 17, 1993; Online April 24, 2008


Damage during thermomechanical fatigue loading of a metal matrix composite is represented by a vector. The undamaged material is characterized by the generalized Hooke’s law for transversely isotropic materials. The residual elastic properties of metal matrix composite are related to the initial elastic properties by the damage vector. The residual stiffness properties are then correlated with the number of fatigue cycles to failure. The ability to use this concept to determine the safe strength requirement for a given cyclic life is discussed.

Copyright © 1994 by The American Society of Mechanical Engineers
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