Nonlinear Free Vibration for Viscoelastic Moderately Thick Laminated Composite Plates with Damage Evolution

Table 2

Effect of transverse shear on the nonlinear vibrating frequency ${\mathrm{\Omega }}^{*}$ of laminated plates.

$w_{\max \hspace{0.17em}}/h$	Case	$a/h$
		5	10	15	20
1	$T_s=0\text{,}$$T_d=0$	2.73182	1.33970	0.883711	0.677714
	$T_s=0\text{,}$$T_d=1$	2.38090	1.30900	0.872317	0.670063
	$T_s=1\text{,}$$T_d=0$	2.15917	1.21767	0.847933	0.649089
	$T_s=1\text{,}$$T_d=1$	1.90400	1.20830	0.840535	0.64502
2	$T_s=0\text{,}$$T_d=0$	3.92699	2.02683	1.36591	0.998917
	$T_s=0\text{,}$$T_d=1$	2.84119	1.74745	1.30736	0.991473
	$T_s=1\text{,}$$T_d=0$	3.69599	1.92329	1.32000	0.987922
	$T_s=1\text{,}$$T_d=1$	2.68778	1.65347	1.27967	0.981748