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|Title:||An alternative explanation for the negative Poisson's ratios in α-cristobalite|
|Authors:||Grima, Joseph N.|
Evans, Kenneth E.
Materials -- Mechanical properties
|Citation:||Grima, 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.|
|Abstract:||Materials 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.|
|Appears in Collections:||Scholarly Works - FacSciChe|
Scholarly Works - FacSciMet
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|An Alternative Explanation for the Negative Poisson's Ratios in Auxetic Foams.pdf|
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