关键词: 棒状共晶团, 复合陶瓷, 细观强度模型, 界面应力, 长径比, 剪滞法

Abstract:

Based on shear-lag method,the relationships of the far field stress of the stick eutectic colony,the interface shear stress of the stick eutectic colony,the volume content of the stick eutectic colony and
the slenderness ratio of the stick eutectic colony were derived.And then the tensile-strength of composite ceramics was got.The probability distribution of the slenderness ratio of
the stick eutectic colony was leaded in the strength model.And the random orientation of stick eutectic colony was considered.The ratio β which stands for the length ratio
maximizing the interface shear stress of the stick eutectic colony was leaded in the strength model.The ratio β  was decided according to the material and can be got by
experiments.The influences of β on the composite ceramics were analyzed.And the calculation programming was compiled in MATLAB.

Key words: stick eutectic colony, composite ceramic, mesomechanical strength model, interface stress, slenderness ratio, shear-lag method