Postbuckling of FGM Cylindrical Panels Resting on Elastic Foundations Subjected to Axial Compression under Heat Conduction
Publication: Journal of Aerospace Engineering
Volume 28, Issue 4
Abstract
A postbuckling analysis is presented for functionally graded material (FGM) cylindrical panels resting on elastic foundations subjected to axial compression under heat conduction. Two kinds of micromechanics models, namely, Voigt model and Mori-Tanaka model, are considered. The material properties of FGMs are assumed to be graded in the thickness direction according to a simple power law distribution in terms of the volume fractions of the constituents and are assumed to be temperature-dependent. The formulations are based on a higher-order shear deformation theory with a von Kármán-type of kinematic nonlinearity. The panel-foundation interaction and thermal effects are also included. The nonlinear prebuckling deformations and initial geometric imperfections of the panel are both taken into account. A singular perturbation technique along with a two-step perturbation approach is employed to determine the buckling loads and postbuckling equilibrium paths. The effects of volume fraction index, temperature variation, foundation stiffness, panel curvature ratio as well as the in-plane boundary condition of straight edges on the postbuckling behavior of FGM cylindrical panels are discussed in detail.
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Acknowledgments
The support for this work, provided by the National Natural Science Foundation of China under Grant 51279103, is gratefully acknowledged.
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Published In
Journal of Aerospace Engineering
Volume 28 • Issue 4 • July 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 26, 2014
Accepted: May 28, 2014
Published online: Aug 6, 2014
Discussion open until: Jan 6, 2015
Published in print: Jul 1, 2015
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