Modeling and active vibration suppression of a single-walled carbon nanotube subjected to a moving harmonic load based on a nonlocal elasticity theory

2014 ◽  
Vol 117 (3) ◽  
pp. 1547-1555 ◽  
Author(s):  
A. A. Pirmohammadi ◽  
M. Pourseifi ◽  
O. Rahmani ◽  
S. A. H. Hoseini
Keyword(s):  
Carbon Nanotube ◽  
Elasticity Theory ◽  
Nonlocal Elasticity ◽  
Vibration Suppression ◽  
Nonlocal Elasticity Theory ◽  
Harmonic Load ◽  
Single Walled Carbon Nanotube ◽  
Active Vibration Suppression ◽  
Moving Harmonic Load ◽  
Active Vibration

Nonlinear Vibration Analysis of Single-Walled Carbon Nanotube With Shell Model Based on the Nonlocal Elasticity Theory

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
P. Soltani ◽  
J. Saberian ◽  
R. Bahramian
Keyword(s):  
Carbon Nanotube ◽  
Differential Equations ◽  
Nonlinear Vibration ◽  
Nonlocal Elasticity ◽  
Geometrical Nonlinearity ◽  
Nonlocal Parameter ◽  
Nonlocal Elasticity Theory ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Aspect Ratios

In this paper, nonlinear vibration of a single-walled carbon nanotube (SWCNT) with simply supported ends is investigated based on von Karman's geometric nonlinearity and nonlocal shell theory. The SWCNT is designated as an individual shell, and the Donnell's formulations of a cylindrical shell are used to obtain the governing equations. The Galerkin's procedure is used to discretized partial differential equations (PDEs) into the ordinary differential equations (ODEs) of motion, and the method of averaging is applied to obtain an analytical solution of the nonlinear vibration of (10,0), (20,0), and (30,0) zigzag SWCNTs. The effects of the nonlocal parameters, nonlinear parameters, different aspect ratios, and different circumferential wave numbers are investigated. The results of the classical and the nonlocal models are compared with different nonlocal elasticity constants (e0a). It is shown that the nonlocal parameter predicts different resonant frequencies in comparison to the local models. The softening and/or hardening nonlinear behaviors of the CNTs may change against the nonlocal parameters. Hence, considering the geometrical nonlinearity and the nonlocal elasticity effects, the dynamical models of the SWCNTs predict their vibration behaviors accurately and should not be ignored during theoretical modeling.

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