Modeling of progressive damage in unidirectional ceramic matrix composites
- Air Force Institute of Technology, Wright-Patterson AFB, OH (United States)
This paper modifies an existing shear-lag model to analyze the damage progression within unidirectional ceramic matrix composites under a monotonic increasing load. The shear-lag model presented by Kuo and Chou is extended using the concept of a critical strain energy to determine analytical solutions for matrix cracking and fiber failure within these composite systems. In all, the damage mechanisms considered herein are matrix cracking, fiber/matrix interfacial debonding and fiber fracture. A priori knowledge of the composite`s proportional limit yields a complete closed form stress-strain solution. The utility of the proposed model lies in its ability to determine the laminate`s stress-strain response with minimum reliance on empirical data. Further, the proposed approach may offer an alternative means of estimating the interfacial strength through empirical fitting of crack density and stress-strain data.
- OSTI ID:
- 175122
- Report Number(s):
- CONF-950686--
- Country of Publication:
- United States
- Language:
- English
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