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Analysis of the high strain compression of open-cell foams

Zhu, Hanxing, Mills, N. J. and Knott, J. F. 1997. Analysis of the high strain compression of open-cell foams. Journal of the Mechanics and Physics of Solids 45 (11-12) , pp. 1875-1899. 10.1016/S0022-5096(97)00027-6

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Abstract

The high strain compression of open-cell foams is analysed, using a lattice model with tetrakaidecahedral cells. The buckling of elastic cell edges, under combined bending and torsional loads, is analysed, and the deformed shapes predicted. The stress-strain relation and Poisson's ratio are predicted for strains up to 70%, for compression in the [001] and [111] directions of the BCC lattice. The prediction for [111] compression is closest to experimental stress-strain curves for polyurethane foams, especially when the cell shape anisotropy is taken into account. A plateau in the compressive stress-strain curve is not predicted, whereas one is observed for compression along the foam rise direction. Reasons for this are discussed; there is a small contribution from the polymer non-linearity, but irregular cell structures need to be analysed. The deformation, both of individual cells and of the PU foam, is compared with the theory.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Additional Information: Additional page numbers: 1901-1904.
Publisher: Elsevier
ISSN: 0022-5096
Last Modified: 04 Jun 2017 06:45
URI: http://orca.cf.ac.uk/id/eprint/64469

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