Abstract: A laminated composite bar of rectangular cross section consists of a milde portion of one material and upper and lower identeal cover plates of onother muterial. Compressive and tensile forces each equal to P are umformly distributed at the ends of the upper ama lower cover plates Fig. I,. They form conples at both ends of the bar. Our aim is to find the interlaminar stresses or how the forces are transmitted through the glued sarfaces.

Key words: quasi-conforming element, displacement function, error analysis, finite element method, 9-parameter triangular plate element