Indentation of rigidly supported sandwich beams with foam cores exhibiting non-linear compressive behaviour.
- Autori: Pitarresi, G; Guimaraes Amorim, JP
- Anno di pubblicazione: 2011
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: 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.