A general methodology was constructed to develop the fundamental solution for a crack embedded in an infinite non-homogeneous material in which the shear modulus varies exponentially with the y coordinate. The fundamental solution was used to generate a solution to fully interactive multiple crack problems for stress intensity factors and strain energy release rates. Parametric studies were conducted for two crack configurations. The model displayed sensitivity to crack distance, relative angular orientation, and to the coefficient of nonhomogeneity.Shbeeb, N. I. and Binienda, W. K. and Kreider, K. L.Glenn Research CenterCRACKS; EMBEDDING; INHOMOGENEITY; STRAIN ENERGY RELEASE RATE; STRESS INTENSITY FACTORS; CARTESIAN COORDINATES; MODULUS OF ELASTICITY; SHEAR PROPERTIES; SENSITIVITY...