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GIUSEPPE PITARRESI

A comparative evaluation of crashworthy sandwich structures

  • Authors: Pitarresi, G.; Carruthers, J.; Robinson, M.; Torre, L.; Kenny, J.; Ingleton, S.; Valecela, O.; Found, M.
  • Publication year: 2007
  • Type: Articolo in rivista
  • OA Link: http://hdl.handle.net/10447/31798

Abstract

This paper describes an experimental evaluation of the energy absorption properties of a series of novel designs for cost-effective crashworthy composite sandwich structures. All the designs are based on the concept of the "tied-core" sandwich, i.e. the use of additional core reinforcements that act to tie the opposing facings of a sandwich together, thus preventing catastrophic failure under edgewise loading. The design, manufacture and crush testing of hollow rectangular tubes fabricated from six different tied-core concepts is described. Factors that are shown to promote high energy absorption include large, continuous areas of contact between the facings and the ties, non-thin sandwich facings, strong corners reinforced with continuous hoop fibres, and the use of an appropriate collapse trigger mechanism.