ABSTRACT
In this chapter, the stress-dependent, cyclic-dependent, and time-dependent crack opening behavior in ceramic-matrix composites were investigated. The values of crack opening displacement (COD), interface debonding ratio, and fiber and matrix axial displacement were determined using the micromechanical approach, considering different damage mechanisms of matrix cracking, interface debonding, interface wear, and interface oxidation. Experimental CODs of SiC/SiC composites were predicted for different cracks. Effects of composite's constituent properties, stress level, cycle number, and temperature on COD and related damage parameters were also discussed.
