Abstract
In this chapter, the time-, stress-, and cycle-dependent matrix multicracking of fiber-reinforced ceramic-matrix composites (CMCs) with the interface debonding, interface wear, interface oxidation, and fiber fracture is investigated. The shear-lag model combined with the interface debonding, interface wear, interface oxidation, fiber fracture models, and the fiber/matrix interface debonding criterion is adopted to determine the microstress field of the damaged fiber-reinforced CMCs. The effects of the fiber volume and interface shear stress in the debonding and oxidation region, the interface debonding energy, the oxidation temperature, and time on the matrix multicracking, interface debonding and oxidation, and fiber fracture are discussed. The experimental matrix multicracking evolution of unidirectional C/SiC, SiC/SiC, mini-SiC/SiC, SiC/CAS, SiC/CAS-II, and SiC/borosilicate composites is predicted.
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