Bi-modal buckling of optimised truss-lattice shear panels

P A Williams, H A Kim, R Butler

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A truss-lattice panel is modeled under shear loading, up to and beyond the critical buckling load. Nondimensional buckling loads and corresponding buckling mode shapes are obtained for such panels with increasing numbers of diagonally placed internal struts. A method for minimum-mass optimization of the truss lattice is given, based upon simultaneous in-plane and out-of-plane buckling. The finite element method is applied to examine the buckling performance and postbuckling stability. The postbuckling response of the optimized truss lattice is shown to be stable in all cases. The advantages of using the truss-lattice structure are demonstrated by comparing the volume requirements with those of a conventional continuous shear panel, based on the load carried and the buckling capabilities. It is shown that although the continuous shear panel is more efficient for heavy load applications, the truss lattice offers potential weight savings when lighter loads are applied.
Original languageEnglish
Pages (from-to)1937-1962
Number of pages26
JournalAIAA Journal
Volume46
Issue number8
DOIs
Publication statusPublished - 2008
EventAIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Waikiki, HI, USA United States
Duration: 1 Jan 2008 → …

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Buckling
Struts
Finite element method

Keywords

  • Struts
  • Shear deformation
  • Trusses
  • Buckling
  • Structural loads
  • Optimization
  • Structural panels

Cite this

Bi-modal buckling of optimised truss-lattice shear panels. / Williams, P A; Kim, H A; Butler, R.

In: AIAA Journal, Vol. 46, No. 8, 2008, p. 1937-1962.

Research output: Contribution to journalArticle

Williams, P A ; Kim, H A ; Butler, R. / Bi-modal buckling of optimised truss-lattice shear panels. In: AIAA Journal. 2008 ; Vol. 46, No. 8. pp. 1937-1962.
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