Structural Stability and Dynamics of FGM Plates Using an Improved 8-ANS Finite Element

Table 2

Normalized nondimensional natural frequency of S-FGM plate (power law index: ).

Nodes per side	4-node shell element (see [2])	Ratio ([2]/exact)	Present	Ratio (present/exact)
5	8.076	1.105	7.717	1.056
9	7.517	1.029	7.351	1.006
17	7.366	1.008	7.323	1.002
33	7.329	1.003	—	—
Analytical solution	7.307	—	—	—

Result is computed using Navier’s method with first-order shear deformation theory, independently.
Results are computed using the quasi-conforming 4-ANS finite element, independently.