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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Mcdonald, Samuel Alan
MAX IV Laboratory
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2018AN INVESTIGATION INTO THE INTERFACE BEHAVIOUR OF AN ALUMINIUM/SILICON CARBIDE FIBRE METAL MATRIX COMPOSITE
- 2017Crack healing behaviour of Cr2AlC MAX phase studied by X-ray tomographycitations
- 2017Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steelcitations
- 2017Microstructural evolution during sintering of copper particles studied by laboratory diffraction contrast tomography (LabDCT)citations
- 2016Application of a Quasi in-situ Experimental Approach to Estimate 3-D Pitting Corrosion Kinetics in Stainless Steelcitations
- 2014Correlative tomographycitations
- 2013Observation and quantification of three-dimensional crack propagation in poly-granular graphitecitations
- 2012In-situ X-ray microtomography study of the movement of a granular material within a diecitations
- 2012Spallation response of Ti-6Al-4V: Rear surface velocimetry and X-ray tomographycitations
- 2011In situ 3D X-ray microtomography study comparing auxetic and non-auxetic polymeric foams under tensioncitations
- 2009Shear cracking in an Al powder compact studied by X-ray microtomographycitations
- 2007The shock response, simulation and microstructural determination of a model composite materialcitations
- 2006Particle movement during the deep penetration of a granular material studied by X-ray microtomographycitations
- 2004Quantification of creep cavitation damage around a crack in a stainless steel pressure vesselcitations
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article
In situ 3D X-ray microtomography study comparing auxetic and non-auxetic polymeric foams under tension
Abstract
X-ray microtomography has been used to study in situ the uniaxial tensile response of low-density polyurethane foam. Two variants have been examined, one before and one after treatment to generate auxetic behaviour. For both variants, microstructurally faithful finite element (FE) models have been constructed from the initial tomographs. For each variant a series of tomographs have been collected during progressive straining. Poisson's ratios of 0.30 (conventional, non-auxetic) and -0.22 (auxetic) have been measured for the two variants by digital image correlation (DIC) between successive images. By comparison, the FE models exhibited Poisson's ratio's of 0.5 and -0.3, respectively. Key micromechanical mechanisms responsible for the auxetic effect have been observed during straining, such as the straightening of bent ribs and rotation of nodes (joints), compared to changes in the angles between essentially straight struts for the non-auxetic variant. The microstructurally faithful FE models confirm the mechanisms observed in the experiments and enable characteristic rib and node behaviour to be followed in greater detail. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.