MECHANICAL BEHAVIOR AND PROPERTIES OF FIBER REINFORCED CERAMIC MATRIX COMPOSITES FOR HIGH TEMPERATURE USE
Ceramics can keep their mechanical characteristics up to 2000 ℃ or higher. In the ceramic matrix composites, the purpose of reinforcing is mainly to enhance toughness by utilizing fiber/matrix interfacial characteristics. Thus, the strengthening mechanism of CMC ultimate tensile should stand on the basis of frictional resistance along the interface as well as fracture strength of constituents. 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.
Chongdu Cho Qiang Pan Sangkyo Lee
Department of Mechanical Engineering, Inha University, Incheon, 402-751, S.Korea
国际会议
昆明
英文
49-55
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）