Abstract
AbstractIn this chapter, a micromechanical approach is developed to predict the time-dependent crack opening behavior in SiC/SiC composite. Micro-stress fields in the different damage regions, i.e., interface oxidation region, interface slip region, and interface bonding region, are obtained, and the axial fiber displacement (AFD), axial matrix displacement (AMD), and cracking opening displacement (COD) are calculated. Experimental CODs in SiC/SiC composite for different matrix crack lengths are predicted. Effects of fiber volume fraction, stress level, and interface properties on time-dependent crack opening behavior (e.g., AFD, AMD, COD, and crack opening stress (COS)) in SiC/SiC composite are analyzed. Relationships between the cracking opening, composite’s constituent properties, and stress level are established.KeywordsCeramic-matrix composites (CMCs)Crack openingTensileElevated temperature
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