ABSTRACT
There were many works in literature on the periodic problems in the theory of plane elasticity for isotropic material, e.g ., researches on stress distribution in the neighborhoods of periodic holes by R. C. J. Howland, G. N. Savin, L. M. Tang, M. Isida, study on periodic contact problems by G. M. L. Gladwall and in vestigation for expression of periodic stress functions by S . Morigashi. All these works have limitations in either the shape of the holes or the boundary condition, and the discussions are incomplete. Especially, there were few studies on the pos sibility of quasi-periodic displacements .
