Axisymmetric postbuckling analysis of size-dependent functionally graded annular microplates using the physical neutral plane

Ke, Liao-Liang, Yang, Jie, Kitipornchai, Sritawat and Wang, Yue-Sheng (2014) Axisymmetric postbuckling analysis of size-dependent functionally graded annular microplates using the physical neutral plane. International Journal of Engineering Science, 81 66-81. doi:10.1016/j.ijengsci.2014.04.005


Author Ke, Liao-Liang
Yang, Jie
Kitipornchai, Sritawat
Wang, Yue-Sheng
Title Axisymmetric postbuckling analysis of size-dependent functionally graded annular microplates using the physical neutral plane
Journal name International Journal of Engineering Science   Check publisher's open access policy
ISSN 0020-7225
1879-2197
Publication date 2014-08
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.ijengsci.2014.04.005
Open Access Status
Volume 81
Start page 66
End page 81
Total pages 16
Place of publication Philadelphia, PA United States
Publisher Elsevier
Collection year 2015
Language eng
Abstract This paper investigates the axisymmetric postbuckling of functionally graded material (FGM) annular microplates based on the modified couple stress theory, Mindlin plate theory and von Kármán geometric nonlinearity. Material properties are assumed to be graded in the thickness direction according to Mori-Tanaka homogenization method. By using the physical neutral plane, the bending-extension coupling is eliminated in both nonlinear governing equations and boundary conditions of FGM microplates. The differential quadrature (DQ) method is employed to discretise the governing equations, which are then solved to obtain the postbuckling path of FGM microplates with different boundary conditions. Numerical results are presented to highlight the effects of length scale parameter, gradient index, inner-to-outer radius ratio and radius-to-thickness ratio on the postbuckling characteristics of FGM microplates. It is found that FGM microplates do exhibit the bifurcation-type buckling when the applied in-plane compressive load acts along the physical neutral plane.
Keyword Functionally graded materials
Microplates
Modified couple stress theory
Postbuckling
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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