Mechanical behaviour of bistable struts

J Cai, Y Xu, J Feng, J Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The mechanical behaviour of a bistable structural element, which is based on the
snap-through and bifurcation properties of the von Mises truss, has been investigated in this article. By assuming the joint behaviour as ideal hinges and using the large deformation theory based on a linear elastic material, a simple analytical model for the stability of the von Mises truss was formulated. The governing set of non-linear equilibrium equations was obtained by applying
the principle of stationary total potential energy. Then, the formulae of the snap-through and bifurcation buckling loads and the equilibrium path were given. In addition to the well-known cases of primary and secondary branches, a third type that the bifurcation buckling point lying on the descending branch of the load versus displacement curve was discussed. In this case, although its upper bifurcation load is lower than its upper snap-through buckling load, the
truss experiences a symmetric snap-through mode first, and hence the bifurcation point is not physically relevant. Finally, the assumptions of the classical von Mises truss analysis are discussed.
Original languageEnglish
Pages (from-to)1321-1325
Number of pages5
JournalProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Volume226
Issue numberC5
Early online date16 Sep 2011
DOIs
Publication statusPublished - 2012

Keywords

  • struts
  • buckling, trusses
  • non-linear
  • snap-through
  • mechanical properties

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