Strain rate dependence of stiffness and Poisson's ratio of auxetic open cell PU foams

P Pastorino, FL Scarpa, S Patsias, JR Yates, SJ Haake, M Ruzzene

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

25 Citations (Scopus)

Abstract

The paper describes the manufacturing and tensile testing of auxetic (negative Poisson's ratio) thermoplastic polyurethane and polyester urethane foams, under quasi-static and constant strain rate loading. The foams are produced from conventional flexible polyurethane basis following a manufacturing route developed in previous works. The Poisson's ratio behaviour over compressive strain has been analyzed using an Image Data processing technique based on Edge Detection from digital images recorded using camcorders and high speed cameras. The measurements indicate that higher strain rate loading implies stiffening effects on the stress-strain curves, and significant increase of the magnitudes of the Poisson's ratios with increasing compressive strains.
Translated title of the contributionStrain rate dependence of stiffness and Poisson's ratio of auxetic open cell PU foams
Original languageEnglish
Pages (from-to)955 - 965
Number of pages11
Journalphysica status solidi (b)
Volume244(3)
DOIs
Publication statusPublished - Feb 2007

Bibliographical note

Publisher: Wiley Interscience

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