Modelling the indentation of low density polymer foams

Nigel Mills, Adam Gilchrist

Research output: Contribution to journalArticle

52 Citations (Scopus)


The response of open-cell polyurethane (PU) foams was measured in compression, simple shear and combinations thereof. The data was fitted with Ogden's strain energy function for compressible hyperelastic solids, using one or two moduli. The Ogden function is also compared with the predictions of a micromechanics model. Finite Element Analysis (FEA) was used to predict the foam response for both plane strain indentation and the axisymmetric Indentation Force Deflection (IFD) test. Experimental deformation patterns and pressure distributions validate the predictions. The predicted relative indentation forces are about 20% less than the experimental values. Test piece geometry is shown to affect the IFD values, and interface friction to affect the deformation pattern.
Original languageEnglish
Pages (from-to)389-412
Number of pages24
JournalCellular Polymers
Issue number6
Publication statusPublished - 1 Jan 2000


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