Abstract

AbstractIn this chapter, the vibration damping in fiber-reinforced ceramic-matrix composites (CMCs) was investigated considering fiber debonding and fracture. Micromechanical vibration damping models were developed considering multiple damage mechanisms. Relationships between the damping of CMCs, damping of fiber and the matrix, damping caused by frictional slip between the fiber and the matrix, and fiber debonding and fracture were established. Effects of fiber volume, matrix crack spacing, interface shear stress, interface debonding energy, fiber strength and fiber Weibull modulus on the damping of CMCs, interface debonding and slip between the fiber and the matrix, and fiber broken fraction were analyzed. Experimental damping of 2D C/SiC composite was predicted.KeywordsC/SiCDampingMatrix crackingInterface debonding

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