SEDL / STP / STP1253-EB / STP18240S

Simulation of Fatigue Behavior of High Temperature Metal Matrix Composites

Tong, MT
Research engineer, director, Mechanics and Instrumentation revision, and senior aerospace engineer, NYMA, Inc., Brook Park, OH

Singhal, SN
Research engineer, director, Mechanics and Instrumentation revision, and senior aerospace engineer, NYMA, Inc., Brook Park, OH

Chamis, CC
Senior aerospace scientist and senior research engineer, NASA Lewis Research Center, Cleveland, OH

Murthy, PLN
Senior aerospace scientist and senior research engineer, NASA Lewis Research Center, Cleveland, OH

Pages: 12    Published: Jan 1996

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Abstract

A generalized relatively new approach is described for the computational simulation of fatigue behavior of high temperature metal matrix composites (HT-MMCs). This theory is embedded in a specialty-purpose computer code. The effectiveness of the computer code to predict the fatigue behavior of HT-MMCs is demonstrated by applying it to a silicon-fiber/titanium-matrix HT-MMC. Comparative results are shown for mechanical fatigue, thermal fatigue, thermomechanical (in-phase and out-of-phase) fatigue, as well as the effects of oxidizing environments on fatigue life. These results show that the new approach reproduces available experimental data remarkably well.