GENERAL THEORY ON STRESS ANALYSIS OF LAMINATED COMPOSITE PLATE PRESSED BY DISTRIBUTED LOADING

A general theory on stress analysis of laminated composite plate pressed by distributed loading is presented for overcoming the defect of classical plate theory and improving the precision of interfacial stress analysis. By means of the principle of superposition, the loading state of the composite laminated plate is decomposed into symmetric anti-symmetric states. The Fourier series and Legendre series are applied to describe the displacement field of each composite ply and glue layer in the above states. The principle of generalized potential energy is used to determine the unknown coefficients of the above series. In addition, the glue layers are considered to have finite thickness and finite elastic constants in this analysis. From the computational results, it can be shown that the displacements and stresses converge very well, and the distributions of transversal shearing and normal stresses obtained from the constitutive equation agree with those obtained from the equilibrium equation very well.