Abstract
A method for expressing a distribution of Young's modulus in composite materials by the embedded force doublet in homogeneous body is discussed. In the body force method, a problem of composite material is, so far, is analyzed based on the continuity of the traction and displacement along the boundary between the matrix and the inclusion. In the present theory, a circular inclusion problem is used to demonstrate the applicability of the force doublet. The present method could be used for further general inhomogeneity problems. For example, a functionally graded material in which the material property is varied as a function of coordinate variables could be treated based on a principle of superposition.
