Nonlinear vibration and instability of embedded double-walled boron nitride nanotubes based on nonlocal cylindrical shell theory

被引:53
作者
Arani, A. Ghorbanpour [1 ,2 ]
Kolahchi, R. [1 ]
Maraghi, Z. Khoddami [1 ]
机构
[1] Univ Kashan, Fac Mech Engn, Kashan, Iran
[2] Univ Kashan, Inst Nanosci & Nanotechnol, Kashan, Iran
关键词
Nonlinear vibration; Instability; Cylindrical shell; Double-walled boron nitride nanotubes conveying viscous fluid; Differential quadrature method; BUCKLING ANALYSIS; CARBON NANOTUBES; ELASTIC PROPERTIES; STABILITY; DWBNNTS;
D O I
10.1016/j.apm.2013.03.020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper investigates the nonlinear vibration and instability of the embedded double-walled boron nitride nanotubes (DWBNNTs) conveying viscous fluid based on nonlocal piezoelasticity cylindrical shell theory. The elastic medium is simulated as Winkler-Pasternak foundation, and adjacent layers interactions are assumed to have been coupled by van der Walls (vdW) force evaluated based on the Lennard-Jones model. The nonlinear strain terms based on Donnell's theory are taken into account. The Hamilton's principle is employed to obtain coupled differential equations, containing displacement and electric potential terms. Differential quadrature method (DQM) is applied to estimate the nonlinear frequency and critical fluid velocity for clamped supported mechanical and free electric potential boundary conditions at both ends of the DWBNNTs. Results indicated that some parameters including nonlocal parameter, elastic medium's modulus, aspect ratio and vdW force have significant influence on the vibration and instability of the DWBNNT while the fluid viscosity effect is negligible. In addition, the low aspect ratio should be taken into account for DWBNNT in optimum design of nano/micro devices. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码:7685 / 7707
页数:23
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