Affiliation of Author(s):民航学院

Journal:JOURNAL OF CERAMIC SCIENCE AND TECHNOLOGY

Key Words:Ceramic-matrix composites (CMCs) damage accumulation matrix cracking interface debonding hysteresis loops

Abstract:In this paper, the damage accumulation of continuous fiber-reinforced ceramic-matrix composites (CMCs) with different fiber preforms, i.e. 2D and 2.5D woven, 3D braided and needled C/SiC, 2D and 3D woven SiC/SiC composites, subject to cyclic tensile loading/unloading at room temperature has been investigated using the hysteresis-based damage parameters. Based on the damage mechanisms of matrix multiple cracking modes and relative frictional sliding between fibers and the matrix, the relationships between the hysteresis-based damage parameters and damage mechanisms of matrix cracking modes, fiber/matrix interface debonding/sliding have been established. The cydic tensile loading/unloading stress/strain hysteresis loops, matrix cracking mode ratio and fiber/matrix interface sliding ratio of 2D and 2.5D woven, 3D braided and needled C/SiC, and 2D and 3D woven SiC/SiC composites have been predicted for different peak stresses. The comparisons of damage accumulation between C/SiC and SiC/SiC composites with different fiber preforms under cyclic tensile loading/unloading have been analyzed.

ISSN No.:2190-9385

Translation or Not:no

Date of Publication:2018-09-01

Correspondence Author:llb