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Affiliation of Author(s):能源与动力学院

Journal:APPLIED COMPOSITE MATERIALS

Key Words:Ceramic matrix composites 2.5D woven C/SiC Multiscale model Hysteresis loops Fatigue

Abstract:This paper presents an intriguing fatigue hysteresis behavior of 2.5 dimensional woven C/SiC composites via the integration tool of advanced experimental techniques with a multiscale theoretical model. Tension-tension fatigue experiment has been carried out to predict the fatigue hysteresis properties of 2.5D woven C/SiC composite at room temperature, accompanied with the fracture of specimens to investigate the mechanism of fatigue damage. Meanwhile, a multiscale fatigue model of 2.5D woven C/SiC composites, which encompasses a micro-scale model of fiber/matrix/porosity in fiber tows and a macro-scale model of unit-cell, has been proposed to provide a reliable validation of the experimental results based on fiber damages resulting from relative slip motion with respect to matrix at interfaces and the architecture of 2.5D woven C/SiC composites. The predicted hysteresis loop from theoretical model at room temperature holds great agreement with that from tension-tension fatigue experiments. Also, effects of fatigue load, braided structural parameters and material properties at micro scale on fatigue hysteresis behavior have been investigated.

ISSN No.:0929-189X

Translation or Not:no

Date of Publication:2017-12-01

Co-author:szg,Yang, Fushu,Chen, Xihui,syd

Correspondence Author:szg,Hu Xuteng