Abstract
The quasi-3D shear deformation theory, which includes the thickness stretching effect into consideration, is employed to develop a Q4 plate element for buckling analysis of two-directional functionally graded sandwich (2D-FGSW) plates. The plates are considered to be formed from three layers, a homogeneous core and two functionally graded face layers with material properties varying in both the thickness and length directions by power gradation laws. The plate element with nine degrees of freedom per node is derived using Lagrange interpolation functions and employed in computing the buckling loads. The accuracy of the element is confirmed by comparing the result obtained in the present work with published data. A parametric study is carried out to illustrate the effect of the material gradation and the layer thickness ratio on the buckling loads. The influence of the length to thickness ratio on the buckling loads of the plates is also examined and discussed.
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