Non-linear free and forced vibration of bi-directional functionally graded truncated conical tube based on the nonlocal gradient strain theory

This paper deals with the free and forced, linear and nonlinear vibration of functionally graded (along with thickness) nanotube, considering the non-uniform cross-section that made a two-dimensional functionally graded (2D-FG) structure. The bi-dimensional nanostructure-dependent governing equation...

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Bibliographic Details
Published in:Waves in random and complex media 2024-07, Vol.34 (4), p.2366-2393
Main Authors: Zhang, Fusheng, Lu, Wei
Format: Article
Language:English
Subjects:
Beam theory (structures)
bi-directional FG
Boundary conditions
Cross-sections
Differential equations
Forced vibration
functionally graded tube
Functionally gradient materials
Generalized differential quadrature method
Hamilton's principle
Iterative methods
Nanotubes
non-uniform tube
Nonlinear response
Nonlinear vibration
nonlocal gradient strain theory
Parameters
Quadratures
Strain analysis
Thickness
truncated conical tube
Two dimensional analysis
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Summary:This paper deals with the free and forced, linear and nonlinear vibration of functionally graded (along with thickness) nanotube, considering the non-uniform cross-section that made a two-dimensional functionally graded (2D-FG) structure. The bi-dimensional nanostructure-dependent governing equation is modeled based on the classic beam theory (Euler-Bernoulli), and they are derived by Hamilton's principle based on nonlocal gradient strain theory considering the von-Kármán nonlinear strain and the external harmonic load. To solve the general equations and calculate the results, the generalized differential quadrature method (GDQM) was used coupled with the numerical iteration method for the nonlinear response. The results are discussed for the different simply-supported and clamped boundary conditions. The 2D-FG nanotube's behavior is analyzed for different nonlinear amplitudes, nonlocal strain gradient parameters and nonlocal parameters, different rates of cross-sections, and different material distributions.
ISSN:1745-5030
1745-5049
DOI:10.1080/17455030.2021.1956016