Table 1: Numerical comparison among R-R and CDM of simply supported DWCNTs: in columns 3 and 5 the first two dimensionless fundamental frequencies and , with , are reported, while in column 4, the first frequency , with  TPa, is listed.

Method

0R-R9.87015.75918.025
CDM9.87015.75918.025

0.1R-R9.41615.03517.197
CDM9.41615.03517.197

0.2R-R8.35713.34415.262
CDM8.35713.34415.262

0.3R-R7.18211.46813.117
CDM7.18211.46813.117

0.4R-R6.1469.81311.224
CDM6.1469.81311.224

0.5R-R5.3008.4639.680
CDM5.3008.4639.680