Differential quadrature for buckling analysis of laminated plates

Two new sets of grid points are proposed for applying differential quadrature (DQ) to the analysis of structural problems. The accuracy and convergence of differential quadrature for buckling analysis of laminated plates are discussed in this paper. A variety of buckling problems, including composite laminated plates with various boundary constrains under uniaxial, biaxial, and combined uniaxial and shear loadings, are solved by the DQ method with the proposed grid spacings. Numerical results indicate that excellent results are obtained by the DQ method on problems sensitive to grid spacings.