Journal
COMPOSITES PART B-ENGINEERING
Volume 56, Issue -, Pages 934-947Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.09.027
Keywords
Plates; Anisotropy; Buckling; Finite element analysis (FEA); Orthotropic functionally graded cubic; B-spline elements
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In the present paper, shear buckling analysis of the orthotropic heterogeneous FGM plates is investigated for the first time. Moreover, influence of the Winkler-type elastic foundation is considered. The material properties are assumed to have in-plane orthotropy and transverse heterogeneity. The most accurate approach, i.e., the three-dimensional elasticity is employed instead of using the approximate plate theories. In contrast to all of the available displacement-based buckling analyses that have employed C-0-continuous commercial finite element codes or semi-analytical methods, present formulations are C-2-continuous due to using the proposed 3D cubic B-spline element. Results are derived based on principle of minimum potential energy and a non-linear finite element procedure utilizing a Galerkin-type 3D cubic B-spline solution algorithm. Buckling loads are detected based on a generalized geometric stiffness concept. In this regard, effects of both the prebuckling and buckling states are considered. To present a better imagination and more detailed discussions, details of the buckling mode shapes and the foundation interaction are discussed for plates with simply-supported edges. In addition, the more practical free and clamped edge conditions are also considered. (C) 2013 Elsevier Ltd. All rights reserved.
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