Our website is currently undergoing maintenance. Article records and full texts remain available. Submissions can be made through the Editorial Manager.

Monitoring Damage Accumulation in Continuous Fiber-Reinforced Ceramic-Matrix Composites with Different Fiber Preforms under Cyclic Loading Using Hysteresis-Based Damage Parameters

Li Longbiao

Journal of Ceramic Science and Technology, Vol. 9, No. 3 (2018), pp. 235-262

DOI: 10.4416/JCST2018-00010

Download full article (PDF)

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 cyclic 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.

Keywords

Ceramic-matrix composites (CMCs), damage accumulation, matrix cracking, interface debonding, hysteresis loops.

View this issue · Article & DOI index