Table 7: Numerical results for sliding end-simply supported DWCNTs: in columns 1 and 3, the first two dimensionless fundamental frequencies and , with , are reported, while in column 2, the first frequency , with  TPa, is listed.


02.4673.9404.506
0.12.4383.8924.452
0.22.3543.7594.299
0.32.2323.5644.077
0.42.0903.3363.816
0.51.9413.0993.545