Affiliation of Author(s):民航学院

Journal:INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

Key Words:Ceramic-matrix composites (CMCs) Damage evolution Oxidation Matrix cracking Interface debonding

Abstract: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 No.:0020-7403

Translation or Not:no

Date of Publication:2017-10-01

Correspondence Author:llb