Buckling and postbuckling of functionally graded multilayer graphene platelet-reinforced composite beams

被引：516

作者：

Yang, Jie ^{[1
]}

Wu, Helong ^{[2
]}

Kitipornchai, Sritawat ^{[2
]}

机构：

[1] RMIT Univ, Sch Engn, POB 71, Bundoora, Vic 3083, Australia

[2] Univ Queensland, Sch Civil Engn, Brisbane, Qld 4072, Australia

来源：

COMPOSITE STRUCTURES | 2017年 / 161卷

基金：

澳大利亚研究理事会;

关键词：

Buckling; Postbuckling; Functionally graded nanocomposite beam; Graphene platelet; Differential quadrature method; MECHANICAL-PROPERTIES; FREE-VIBRATIONS; FGM PLATES; STRENGTH; BEHAVIOR;

D O I：

10.1016/j.compstruct.2016.11.048

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper investigates the buckling and postbuckling behaviours of functionally graded multilayer nanocomposite beams reinforced with a low content of graphene platelets (GPLs) resting on an elastic foundation. It is assumed that GPLs are randomly oriented and uniformly dispersed in each individual GPL-reinforced composite (GPLRC) layer with its weight fraction varying layerwise along the thickness direction. The effective material properties of each layer are estimated by the Halpin-Tsai micromechanics model. The nonlinear governing equations of the beam on an elastic foundation are derived within the framework of the first-order shear deformation beam theory then are converted into a nonlinear algebraic system by using the differential quadrature method. A detailed parametric study is carried out to examine the effects of the distribution pattern, weight fraction, geometry and size of GPL nanofillers, foundation stiffness parameters, slenderness ratio and boundary conditions on the buckling and postbuckling behaviours. The results show that GPLs have a remarkable reinforcing effect on the buckling and postbuckling of nanocomposite beams. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：111 / 118

页数：8

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