Stiffness and energy dissipation in polyurethane auxetic foams

M Bianchi, FL Scarpa, CW Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

125 Citations (Scopus)


Auxetic open cell polyurethane (PU) foams have been manufactured and mechanically characterised under cyclic tensile loading. The classical manufacturing process for auxetic PU foams involves multiaxial compression of the conventional parent foam, and heating of the compressed specimens above the Tm of the foam polymer. Eighty cylindrical specimens were fabricated using manufacturing routes modified from those in the open literature, with different temperatures (135 C, 150 C), compression ratios and different cooling methods (water or room temperature exposure). Compressive tensile cyclic loading has been applied to measure tangent modulus, Poisson’s ratios and energy dissipated per unit volume. The results are used to obtain relations between manufacturing parameters, mechanical and hysteresis properties of the foams. Compression, both radial and axial, was found to be the most significant manufacturing parameter for the auxetic foams in this work.
Translated title of the contributionStiffness and energy dissipation in polyurethane auxetic foams
Original languageEnglish
Pages (from-to)5851 - 5860
Number of pages9
JournalJournal of Materials Science
Publication statusPublished - Sept 2008

Bibliographical note

Publisher: Springer


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