Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Time-dependent proportional limit stress of carbon fiber-reinforced silicon carbide ceramic-matrix composites considering interface oxidation
Li LONGBIAO
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2019 Volume 127 Issue 5 Pages 279-287

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Abstract

This paper reports on an investigation of time-dependent proportional limit stress of carbon fiber-reinforced silicon carbide ceramic-matrix composites (C/SiC CMCs). The temperature-dependent material parameters are considered to determine the proportional limit stress. The effects of the fiber volume fraction, interface properties and matrix fracture energy on the time-dependent proportional limit stress and interface debonding of C/SiC composite are discussed. The temperature-dependent proportional limit stress increases with the fiber volume fraction, interface shear stress, interface debonded energy and matrix fracture energy. The fiber/matrix interface debonded length increases as the oxidation time increases, leading to a decrease in the proportional limit stress. The experimental time-dependent proportional limit stresses of C/SiC composites corresponding to different oxidation times are predicted.

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© 2019 The Ceramic Society of Japan
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