Table 13: Fundamental frequency of vibration of DWCNTs with different boundary conditions between inner and outer tubes and for .

Cl-Fr inner
Cl-SS outer
Cl-Fr inner
Cl-Cl outer
Cl-Fr inner
SS-Sl outer
Cl-Fr inner
Cl-Sl outer

024.61835.5778.2318.916
0.123.31133.6948.6768.796
0.220.35129.1958.3228.427
0.317.20824.5107.8097.901
0.414.54020.6017.2257.304
0.512.42817.5476.6346.702