Damage evolution of fiber-reinforced ceramic-matrix composites under stress-rupture and cyclic loading at elevated temperature in oxidizing atmosphere
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所属单位：民航学院
发表刊物：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
关键字：Ceramic-matrix composites (CMCs) Damage evolution Oxidation Matrix cracking Interface debonding
摘要：In this paper, the damage evolution of fiber-reinforced ceramic-matrix composites (CMCs) subjected to stress rupture and cyclic fatigue loading at elevated temperatures in oxidizing atmospheres has been investigated. The damage parameters of hysteresis dissipated energy, hysteresis modulus, peak strain and hysteresis width have been used to monitor the damage evolution inside of CMCs. The effects of the hold time, stress levels, matrix crack spacing, fiber volume fraction and oxidation temperature on the evolution of damage parameters versus applied cycles have been analyzed. The experimental fatigue hysteresis loops, interface slip lengths, fatigue hysteresis dissipated energy and peak strain of cross-ply SiC/MAS, 2D SiC/SiC and Nextel (TM) 720/Alumina composites subjected to cyclic fatigue and stress-rupture at elevated temperatures have been predicted. (C) 2017 Elsevier Ltd. All rights reserved.
ISSN号：0020-7403
是否译文：否
发表时间：2017-10-01
通讯作者：李龙彪