Postbuckling and Free Nonlinear Vibration of Microbeams Based on Nonlinear Elastic Foundation

Table 1

Comparison of the present frequency with the exact frequency of P-P microbeam ().

	l/h	KL	KP	KNL	P	ωexact	ωpresent	R. error (%)
0.1	0.25	10	10	10	5	13.6049	13.6046	0.0026
	0.5	10	10	10	5	16.4131	16.4128	0.0018
	0.75	10	10	10	5	20.2456	20.2454	0.0012
	1.0	10	10	10	5	24.6288	24.6286	0.0008
1	0.25	50	50	50	20	22.7555	22.7185	0.1626
	0.5	50	50	50	20	24.5384	24.5636	0.1418
	0.75	50	50	50	20	27.2517	27.2198	0.1169
	1.0	50	50	50	20	30.6492	30.6204	0.0937