Levy Type Solution for Nonlocal Thermo-Mechanical Vibration of Orthotropic Mono-Layer Graphene Sheet Embedded in an Elastic Medium
Subject Areas : Engineering
M
Mohammadi
1
(Department of Engineering, Ahvaz Branch, Islamic Azad University)
A
Farajpour
2
(Young Researches and Elites Club, North Tehran Branch, Islamic Azad University)
M
Goodarzi
3
(Department of Engineering, Ahvaz Branch, Islamic Azad University)
R
Heydarshenas
4
(Department of Engineering, Ahvaz Branch, Islamic Azad University)
Keywords: Elastic medium, Thermo-mechanical vibration, Orthotropic single-layered graphene sheets, Analytical Modeling,
Abstract :
In this paper, the effect of the temperature change on the vibration frequency of mono-layer graphene sheet embedded in an elastic medium is studied. Using the nonlocal elasticity theory, the governing equations are derived for single-layered graphene sheets. Using Levy and Navier solutions, analytical frequency equations for single-layered graphene sheets are obtained. Using Levy solution, the frequency equation and mode shapes orthotropic rectangular nanoplate are considered for three cases of boundary conditions. The obtained results are subsequently compared with valid result reported in the literature. The effects of the small scale, temperature change, different boundary conditions, Winkler and Pasternak foundations, material properties and aspect ratios on natural frequencies are investigated. It has been shown that the non-dimensional frequency decreases with increasing temperature change. It is seen from the figure that the influence of nonlocal effect increases with decreasing of the length of nanoplate and also all results at higher length converge to the local frequency. The present analysis results can be used for the design of the next generation of nanodevices that make use of the thermal vibration proper ties of the nanoplates.
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