DQM free vibration analysis of moderately thick symmetric laminated plates with elastically restrained edges

The application of differential quadrature method will be shown for free vibration analysis of moderately thick composite plates with edges elastically restrained against translation and rotation. The governing equations employed are based on the first order shear deformation theory including the effects of rotary inertia. Different combinations of constraints at edges are tested, which includes plates with at least a corner without a rigid support. Angle-ply and cross-ply laminates with different aspect ratios, thickness-to-length ratios are examined. Comparisons are made with results for thin as well as moderately thick angle-ply and cross-ply laminated plates. Highly accurate solutions can be achieved with only a few grid points.