The nonlinear unsymmetrically laminated composite beams on Winkler-Pasternak fundation
Keywords:Nonlinear equations, composite beam, OPIM
In this study, Optimal Parametric Iteration Method (OPIM) is presented for large amplitude free vibrations of nonlinear unsymmetrically laminated composite beams on Winkler – Pasternak elastic foundation. Based on von Kárman geometric nonlinearity, on Euler – Bernoulli beam theory and Galerkin procedure, we obtain a second-order nonlinear differential equation with quadratic and cubic terms. Comparison between results of the present work and those of numerical results shows the accuracy of our approach.
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