POSTBUCKLING ANALYSIS OF STIFFENED LAMINATED PANELS LOADED IN COMPRESSION

An analytical-numerical method is presented for the postbuckling anal plate structures that may be idealized as an assemblage of laminated, rectangular, beams. The formulations are based on the classical laminated plate theory and include a number of refined features. The analysis uses a deflection-type perturbation technique to determine the buckling loads and the postbuckling equilibrium paths. A computer program has been developed and is used to examine the postbuckling behavior of perfect and imperfect blade stiffened panels, with and without longitudinal, transverse or orthogonal beam stiffeners.