Natural frequencies of a functionally graded anisotropic rectangular plate

Free vibrations of a functionally graded anisotropic rectangular plate were analyzed using first-order shear deformation theory (FSDT) coupled with the finite element method. An advantage of a functionally graded plate over a laminated plate is that material properties vary continuously through the plate thickness. Thus no sudden discontinuties in stresses occur across an interface between any two adjoining laminae thereby eliminating the delamination mode of failure. The edge conditions, which were included are all edge clamped, all edge simply supported, two opposite edge clamped and two opposite edges simply supported and other two free.