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GIUSEPPE PITARRESI

Indentation of rigidly supported sandwich beams with foam cores exhibiting non-linear compressive behaviour.

  • Authors: Pitarresi, G; Guimaraes Amorim, JP
  • Publication year: 2011
  • Type: Articolo in rivista (Articolo in rivista)
  • Key words: foam cores, indentation, sandwich composites, Winkler foundation
  • OA Link: http://hdl.handle.net/10447/61806

Abstract

A generalized analytical approach to investigate the indentation of sandwich beams under concentrated loads is presented, based on the Winkler foundation theory. A segment-wise model is implemented to the case of fully backed sandwich beams with polymeric foam cores exhibiting generic non-linear compressive behaviours. Closed-form analytical solutions of the indentation curve are obtained for simplified foam compression behaviours: elastic-perfectly-plastic, bilinear and bilinear-perfectly-plastic. Analytical predictions are compared with experimental data from sandwiches employing foam cores with peculiar non-linear behaviours. The proposed models are found to give a better match of the experimental data than the classic elastic-perfectly-plastic model.