Compressive deformation and energy-absorption capability of aluminium honeycomb core Articles uri icon

publication date

  • August 2017

start page

  • 123

end page

  • 133

volume

  • 174

international standard serial number (ISSN)

  • 0263-8223

electronic international standard serial number (EISSN)

  • 1879-1085

abstract

  • In this study, the crush behaviour and the energy absorption capability of an aluminium honeycomb core is discussed. A three-dimensional finite-element model of a honeycomb-core structure was developed using the commercial code Abaqus. Flatwise and edgewise experimental compressive tests were made to validate the numerical model and good agreement was found between the experimental data and the numerical results. Virtual compressive tests varying the cell size, cell-wall thickness, and material properties were performed. The deformation mode, compressive core behaviour and its energyabsorption capacity were examined. The crushing parameters at in-plane directions were more affected by the variations of the characteristic core parameters; although, in general, increasing the cell-wall thickness and the yield stress of the aluminium alloy give higher crush loads, and therefore the absorbed energy increases. However, if the cell size increases, the energy-absorption capacity decreases. (C) 2017 Elsevier Ltd. All rights reserved.

keywords

  • honeycomb core; crushing behaviour; sandwich structure; modelling; crushing parameters; composite sandwich panels; low-velocity impact; finite-element; inplane; beams; simulations; strength; behavior