Role of aspect ratio in elastic modulus-porosity relationship of triaxial porcelain

The effect of pore geometry on the elastic modulus- porosity relationship of a triaxial porcelain has been studied using the experimentally measured aspect ratio as a fitting parameter. The experimental elastic modulus data have been compared with those predicted from theoretical models based on self-consistency spheroidal intrusion theory and analytically derived expressions of Boccaccini et al., Anderson, and Sudduth. A good fit was obtained with Boccaccini's equation using the experimentally determined aspect ratio at each level of porosity, and with Anderson's equation. Failure of the self-consistent scheme based theory to predict the experimental results over the porosity range of interest was attributed to the fact that this theory is best suited for single phase materials rather than multiphase materials such as triaxial porcelain.