Journal of the Brazilian Society of Mechanical Sciences and Engineering, ( ISI ), Volume (38), No (4), Year (2016-7) , Pages (2707-2619)

Title : ( Free vibration analysis of sigmoid functionally graded nanobeams based on a modified couple stress theory with general shear deformation theory )

Authors: majid akbarzadeh khorshidi , Mahmoud Shariati ,

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Abstract

Free vibration of nano-scale beams made of sigmoid functionally graded material is studied based on the modified couple stress theory. In the context of the modified couple stress theory, a material length scale parameter is used to describe the size effect. The classical, first-order and some higher order beam theories are considered to assess the effect of shear deformation. Differential equations of motion and boundary conditions are derived using Hamilton’s principle. The equations of motion are discretized by generalized differential quadrature method. Finally, a comprehensive solution for the present problem with general shear deformation theory and with different boundary conditions is provided. Then effects of the shear deformation, boundary conditions, Poisson’s ratio, and material composition are studied.

Keywords

Nanostructures  Smart materials  Vibration  Modified couple stress theory
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@article{paperid:1059714,
author = {Akbarzadeh Khorshidi, Majid and Shariati, Mahmoud},
title = {Free vibration analysis of sigmoid functionally graded nanobeams based on a modified couple stress theory with general shear deformation theory},
journal = {Journal of the Brazilian Society of Mechanical Sciences and Engineering},
year = {2016},
volume = {38},
number = {4},
month = {July},
issn = {1678-5878},
pages = {2707--2619},
numpages = {-88},
keywords = {Nanostructures  Smart materials  Vibration  Modified couple stress theory},
}

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%0 Journal Article
%T Free vibration analysis of sigmoid functionally graded nanobeams based on a modified couple stress theory with general shear deformation theory
%A Akbarzadeh Khorshidi, Majid
%A Shariati, Mahmoud
%J Journal of the Brazilian Society of Mechanical Sciences and Engineering
%@ 1678-5878
%D 2016

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