Abstract
AbstractIn this paper, the effect of fiber debonding on matrix multicracking development of different fiber‐reinforced CMCs is investigated using the micromechanical approach. The Budiansky–Hutchinson–Evans shear‐lag model is adopted to analyze the fiber and matrix stress distributions of the damaged composite. The fracture mechanics approach is used to determine the fiber/matrix interface debonding length. Combining the critical matrix strain energy criterion and fracture mechanics fiber/matrix interface debonding criterion, the stress‐dependent matrix multicracking development is analyzed for different fiber volume fraction, fiber/matrix interface properties and matrix cracking characteristic stress. The experimental matrix multicracking development of unidirectional C/Si3N4, SiC/Si3N4, SiC/CAS, SiC/CAS‐II, SiC/SiC, SiC/Borosilicate and mini‐SiC/SiC composites are predicted.
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