Column buckling with shear deformations — A hyperelastic formulation

Mario M. Attard, Giles W. Hunt

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Column constitutive relationships and buckling equations are derived using a consistent hyperelastic neo-Hookean formulation. It is shown that the Mandel stress tensor provides the most concise representation for stress components. The analogous definitions for uniaxial beam plane stress and plane strain for large deformations are established by examining the virtual work equations. Anticlastic transverse curvature of the beam cross-section is incorporated when plane stress or thick beam dimensions are assumed. Column buckling equations which allow for shear and axial deformations are derived using the positive definiteness of the second order work. The buckling equations agree with the equation derived by Haringx and are extended to incorporate anticlastic transverse curvature which is important for low slenderness, high buckling modes and with increasing width to thickness ratio. The work in this paper does not support the existence of a shear buckling mode for straight prismatic columns made of an isotropic material.
Original languageEnglish
Pages (from-to)4322-4339
Number of pages18
JournalInternational Journal of Solids and Structures
Volume45
Issue number14-15
DOIs
Publication statusPublished - Jul 2008

Keywords

  • beam theory
  • anticlastic curvature
  • column buckling
  • shear deformations
  • hyperelastic
  • elastica
  • finite strain
  • Mandel stress tensor

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