Abstract
A multi-mode solution to nonlinear vibration and postbuckling of the titled problem is presented for two straight edges free from forces and bending moments and the other edges subjected to identical variation of rotational stiffness and normal boundary forces. The dynamic Marguerre-type nonlinear equations are adopted. The transverse deflection and stress function are expanded into two series with timedependent coefficients. The Galerkin procedure furnishes an infinite system of ordinary differential equations for these time functions. The method of harmonic balance is used for a solution of a finite number of these equations. The postbuckling behavior is treated as a special case. Numerical results in nonlinear vibration and postbuckling of antisymmetrically laminated angle-ply panel are presented graphically for different panel parameters and also compared with available data.
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