Buckling analysis of variable angle tow, variable thickness panels with transverse shear effects

R. M. J. Groh*, P. M. Weaver

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

52 Citations (Scopus)

Abstract

The manufacture of advanced composite panels with variable fibre angles can lead to laminates with a flat profile on one side and a smooth, curved profile on the other. When modelling these laminates in two-dimensional form the flat plate assumptions may no longer accurately capture the structural behaviour. In this paper the buckling behaviour of laminates with one-dimensional fibre variations and symmetric stacking sequences is investigated. The assumptions of modelling the three-dimensional profile as a flat plate or a cylindrical panel are assessed, taking into account the effects of transverse shear deformation. The governing differential equations are solved in the strong form using the Differential Quadrature method and validated by 2D finite element models. The validity of the two modelling approaches is assessed by comparing the solutions to a 3D finite element model capturing the actual shape of the laminate. It is suggested that the buckling event of these variable angle tow, variable thickness laminates is characterised more accurately by "shell-like" than by "plate-like" behaviour. The idea of investigating the effects of two-dimensional fibre orientations with their associated doubly curved topologies is proposed. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)482-493
Number of pages12
JournalComposite Structures
Volume107
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Variable stiffness laminates
  • Buckling
  • Transverse shear
  • Differential quadrature
  • CURVILINEAR FIBER FORMAT
  • COMPOSITE PLATES
  • POSTBUCKLING ANALYSIS
  • QUADRATURE METHOD
  • LAMINATED PLATES
  • SHELLS
  • OPTIMIZATION
  • INPLANE
  • DESIGN

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