Micromechanics Strain Response of Ceramic-Matrix Composites Under Creep Loading at Elevated Temperature

In this chapter, the creep behavior of fiber-reinforced ceramic-matrix composites (CMCs) at intermediate temperatures was investigated considering the synergistic effects of the interface and fiber oxidation. Relationships between creep stress level, creep strain, interface debonding and interface oxidation, and fibers failure probability were established. Experimental creep behavior of SiC/SiC composite under different peak stresses was evaluated. Effects of the fiber volume, stress level, matrix cracking, interface shear stress, and fiber Weibull modulus on the creep lifetime, interface damage, and fibers failure probability of SiC/SiC composite were analyzed.