Some effects of fiber-matrix interfacial debonding on the response of uni-directional ceramic-matrix composite materials
The mechanical behavior of a uni-directional ceramic-matrix composite material depends heavily on the fiber-matrix interfacial property. This research, therefore, focuses on some problems associated with transverse loading of a uni-directional ceramic composite material. Extensive discussion is given of the stress analysis associated with debond cracks at the fiber-matrix interface. The classical solution involves overlapping of the crack surfaces near the crack tips. The interfacial debond crack problem with contact is examined by using the Muskhelishvili complex-potential method. It is shown that the problem reduced to the solution of two coupled singular integral equations. For frictionless contact, the problem is further shown to reduce to one singular integral equation that must be solved numerically. Special attention is given to the extent of contact zones because the crack may close due to the orientation of the applied loads. Results are applied to the study of interfacial crack growth wherein the energy-release rate predicted by the exact solution is compared with the prediction based on the classical (overlapping) solution.
- Research Organization:
- Pittsburgh Univ., PA (United States)
- OSTI ID:
- 5470340
- Country of Publication:
- United States
- Language:
- English
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