Paper Information

Journal:   JOURNAL OF SOLID MECHANICS   SUMMER 2011 , Volume 3 , Number 3; Page(s) 258 To 270.
 
Paper: 

ANALYSIS OF NONLINEAR VIBRATIONS FOR MULTI-WALLED CARBON NANOTUBES EMBEDDED IN AN ELASTIC MEDIUM

 
 
Author(s):  GHORBANPOUR ARANI A.*, RABBANI H., AMIR S., KHODDAMI MARAGHI Z., MOHAMMADIMEHR M., HAGHPARAST E.
 
* FACULTY OF MECHANICAL ENGINEERING, UNIVERSITY OF KASHAN, KASHAN, IRAN
 
Abstract: 

Nonlinear free vibration analysis of double-walled carbon nanotubes (DWCNTs) embedded in an elastic medium is studied in this paper based on classical (local) Euler-Bernoulli beam theory. Using the averaging method, the nonlinear free vibration responses of DWCNTs are obtained. The result is compared with the obtained results from the harmonic balance method for single-walled carbon nanotubes (SWCNTs) and DWCNTs. The effects of the surrounding elastic medium, van der waals (vdW) forces and aspect ratio of SWCNTs and DWCNTs on the vibration amplitude are discussed. The error percentage of the nonlinear free vibration frequencies between two theories decreases with increasing the spring constant of elastic medium. Results are also shown that if the value of the spring constant is lower than 107N/m3 (k<107 N/m3), the nonlinear free vibration frequencies are increased. In this case, the effect of the spring constant on frequency responses is significant, while if the value of the spring constant is higher than 109 N/m3 (k>109 N/m3 ), the curve of frequency responses has a constant value near to 1 and therefore the effect of the spring constant on frequency responses is negligible.

 
Keyword(s): NONLINEAR VIBRATION, NANOTUBES, VAN DER WAALS, EULER-BERNOULLI BEAM, NATURAL FREQUENCY
 
References: 
 
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