Nonlinear Static Bending and Free Vibration Analysis of Bidirectional Functionally Graded Material Plates

Table 2

Nonlinear-to-linear frequency ratio of FGM square plate, .

Method
		0.0	0.2	0.4	0.6	0.8	1
This work	elements	1.00	1.001	1.004	1.092	1.100	1.229
	elements	1.00	1.009	1.011	1.150	1.204	1.382
	elements	1.00	1.018	1.077	1.169	1.283	1.410
	elements	1.00	1.019	1.078	1.168	1.282	1.409
[30]		1.00	1.021	1.081	1.174	1.293	1.436
[31]		1.00	1.027	1.089	1.189	1.309	—