Abstract
A new method was developed for calculating effective elastic parameters of a medium containing oblate spheroidal cracks having parallel planes. This new method is free from the restrictions of isotropic matrix material and low crack density. Velocity anisotropy was calculated for the case of oriented cracks filled with fluid. Effects of crack aspect ratio, fluid bulk modulus, and crack volume on velocity anisotropy were investigated. The present results showed smaller anisotropy than that given by ANDERSON et al. (1974) for a medium containing oriented spheroidal cracks. The relation between velocity and crack density parameter (ratio of porosity to aspect ratio of cracks divided by 4π/3) was investigated using these results.
