Modelling The Elastic Response Of A
Polyurethane Open Cell Foam Based On A
Minimal Surface Energy Approach
Author(s)
B. Buffel, F. Desplentere, K. Bracke & I. Verpoest
Abstract
Within the present study the elastic response of a flexible open cell polyurethane
foam was studied by means of experimental compression tests and finite element
(FE) modelling. The compression tests revealed a pronounced sample size effect
which was taken into account using an analytical model. In order to eliminate the
sample size and damage effects, a minimal sample size of at least 50 times the
cell size was necessary in the case of the flexible foam. Surface evolver software
was used to model the open cell foam structures. The FE unit cells are based on
the well-known Kelvin cell and the more complex Weaire-Phelan cell topology.
In both cases the cross sectional shape of the cell edges was completely
determined by the minimisation of the surface energy. The thus build FE-models
possess a good resemblance to real open cell foam structures. The influence of
relative density and shape anisotropy on the elastic properties of the cellular
structures was analysed using the FE-models.
Keywords: open cell foam, Kelvin cell, Weaire-Phelan cell, surface evolver.
Keywords
Keywords: open cell foam, Kelvin cell, Weaire-Phelan cell, surface evolver.
Related Book
Other papers in this volume
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