In this paper, the two-dimensional axisymmetric distributions of thick circular plate in modified couple stress theory with heat and mass diffusive sources is investigated. The problem is considered in the context of the theories of thermodiffusion elastic solid with one and two relaxation time developed by Sherief _et al._ [_Int. J. Eng. Sci._42, 591 (2004)] and Kumar and Kansal [_Int. ... Read more