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

PASTORINO, P., SCARPA, F., PATSIAS, S., YATES, J. R., HAAKE, Steve and RUZZENE, M. (2007). Strain rate dependence of stiffness and poisson's ratio of auxetic open cell PU foams. Physica status solidi (b), 244 (3), 955-965.

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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.

Item Type:	Article
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Centre for Sports Engineering Research
Identification Number:	https://doi.org/10.1002/pssb.200572714
Page Range:	955-965
Depositing User:	Carole Harris
Date Deposited:	25 Jun 2010 15:08
Last Modified:	18 Mar 2021 09:45
URI:	https://shura.shu.ac.uk/id/eprint/2197

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