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Ceramics can keep their mechanical characteristics up to 2 000℃ or higher.In this paper,A model to predict ultimate strength of continuous fiber-reinforced brittle matrix composites is developed.A statistical theory for the strength of a uni-axially fiber-reinforced brittle matrix composite is presented.Also a semi-empirical frictional heating method for estimating in-situ interfacial shear in fiber-reinforced ceramic matrix composites was improved.Local uneven fiber packing variation as well as uneven micro-damage during fatigue can be expected to have effects on the composites:generation of frictional heating,thermal gradients,and residual stresses around local fiber breaks.This study examined those engineering interests by the finite element method.
A model to predict ultimate strength of continuous fiber-reinforced brittle matrix composites is developed. A statistical theory for the strength of a uni-axially fiber-reinforced brittle matrix composite is presented. Also a semi-empirical frictional heating method for estimating in-situ interfacial shear in fiber-reinforced ceramic matrix composites was improved. Local uneven fiber packing variation as well as as micro micro-damage during fatigue can be expected to have effects on the composites: generation of frictional heating, thermal gradients, and residual stresses around local fiber breaks.This study inspect those engineering interests by the finite element method.