Abstract: A high-order shear deformation theory of laminated composite plates is proposed. The improved theory contains the same independent unknowns as in the first-order shear deformation theory, but acounts for parabolic distribution of the transverse shear strains through the thickness of the plate and the continuity of transverse shear stresses between layers. The present theory predicts the deflections and stresses more accurately when compared with the Reddy's theory.

Key words: composite laminates, small deflection, displacement field