Table 2.

Convergence of $\Omega =\omega (a^2/h)\sqrt{{\rho }_{\mathrm{c}}/{\mathrm{E}}_{\mathrm{c}}}$ for SSSS FGM square plates with h/b = 0.1 and $\overline{m}=1$.

Material Model	Material Ingredient	Mode	$\overline{\mathit{M}}=\mathit{M}+1$						Exact Closed-Form Sol.	Published
			5	10	15	25	30	35
Power-Law	Al/Al2O3	1	4.510	4.433	4.422	4.419	4.418	4.418	4.419 (1,1)	<4.420> (4.347)
		2	11.03	10.63	10.60	10.60	10.58	10.58	10.59 (1,2)	<10.59> (10.42)
		3	11.03	10.63	10.60	10.56	10.58	10.58	10.59 (2,1)	</> (10.42)
		4 *	16.22	16.20	16.20	16.20	16.20	16.20	16.20 (1,0)	<×> (15.94)
		5 *	16.22	16.20	16.20	16.20	16.20	16.20	16.20 (0,1)	<×> (/)
		6	16.90	16.34	16.31	16.30	16.30	16.30	16.31 (2,2)	<16.31> (/)
M-T	Al/ZrO2	1	5.288	5.205	5.193	5.190	5.190	5.190	5.192 (1,1)	{5.096}
		2	12.90	12.45	12.42	12.41	12.41	12.41	12.41 (1,2)	{12.30}
		3	12.90	12.45	12.42	12.41	12.41	12.41	12.41 (2,1)	{12.30}
		4 *	18.10	18.09	18.08	18.08	18.08	18.08	18.08 (1,0)	{17.49}
		5 *	18.10	18.09	18.08	18.08	18.08	18.08	18.08 (0,1)	{17.49}
		6	19.74	19.12	19.08	19.07	19.06	19.06	19.09 (2,2)	{18.87}

Note: ‘×’denotes data missed; ‘/’ denotes data not available; < > denotes results of Hosseini-Hashemi et al. [23]; ( ) denotes results of Zhao et al. [10]; { } denotes results of Ferreira et al. [12]; “*” denotes the in-plane displacement-dominated model; the superscripts “( )” denote the wave numbers in the x-direction and y-direction.