Micro-frictional dissipation in fiber-reinforced ceramic matrix composites and interfacial shear estimation with a consideration of uneven fiber packing

A semi-empirical method for estimating in situ interfacial shear in fiber-reinforced ceramic matrix composites was improved. Temperature distribution without external heating to the composite could be severely driven by internal micro-friction work that was generated due to cyclic micro-movement of continuous and broken fibers relatively sliding against the matrix. Local uneven fiber packing variation as well as uneven micro-damage during fatigue would 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.