Affiliation of Author(s):民航学院
Journal:MATERIALS
Key Words:ceramic-matrix composites (CMCs) fatigue damage evolution life prediction matrix cracking interface debonding
Abstract:In this paper, the fatigue damage and lifetime of 2D SiC/SiC ceramic-matrix composites (CMCs) under cyclic fatigue loading at 750, 1000, 1100, 1200 and 1300 degrees C in air and in steam atmosphere have been investigated. The damage evolution versus applied cycles of 2D SiC/SiC composites were analyzed using fatigue hysteresis dissipated energy, fatigue hysteresis modulus, fatigue peak strain and interface shear stress. The presence of steam accelerated the damage development inside of SiC/SiC composites, which increased the increasing rate of the fatigue hysteresis dissipated energy and the fatigue peak strain, and the decreasing rate of the fatigue hysteresis modulus and the interface shear stress. The fatigue life stress-cycle (S-N) curves and fatigue limit stresses of 2D SiC/SiC composites at different temperatures in air and in steam condition have been predicted. The fatigue limit stresses approach 67%, 28%, 39% 17% and 28% tensile strength at 750, 1000, 1100, 1200 and 1300 degrees C in air, and 49%, 10%, 9% and 19% tensile strength at 750, 1000, 1200 and 1300 degrees C in steam conditions, respectively.
ISSN No.:1996-1944
Translation or Not:no
Date of Publication:2017-04-01
Correspondence Author:llb
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Lecturer
Education Level:南京航空航天大学
Degree:Doctoral Degree in Engineering
School/Department:College of Civil Aviation
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