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dc.contributor.authorGrima, Joseph N.-
dc.contributor.authorGatt, Ruben-
dc.contributor.authorAlderson, Andrew-
dc.contributor.authorEvans, Kenneth E.-
dc.identifier.citationGrima, J. N., Gatt, R., Alderson, A., & Evans, K. E. (2006). An alternative explanation for the negative Poisson's ratios in α-cristobalite. Materials Science and Engineering A, 423, 219-224.en_GB
dc.description.abstractMaterials with a negative Poisson’s ratio (auxetic) exhibit the unusual property of becoming wider when stretched and thinner when compressed. A naturally occurring auxetic material which has attracted a lot of research in recent years is -cristobalite, a silicate for which negative Poisson’s ratios have been experimentally measured. We present the results of force-field based molecular modelling studies which will provide an insight into nano-level deformations that occur when this silicate is subjected to externally applied uniaxial mechanical stresses. These results will suggest that the auxetic behaviour can be explained in terms of a ‘rotation of rigid units’ model and, more specifically we will show that the auxetic behaviour in the (0 1 0) and (1 0 0) planes may be explained in terms of ‘rotating rectangles’ which are the projections of the three-dimensional silicate framework in the (0 1 0) and (1 0 0) planes.en_GB
dc.subjectMaterials -- Mechanical propertiesen_GB
dc.subjectDeformations (Mechanics)en_GB
dc.titleAn alternative explanation for the negative Poisson's ratios in α-cristobaliteen_GB
dc.rights.holderThe copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder.en_GB
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Scholarly Works - FacSciMet

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