Journal
JOURNAL OF THE ROYAL SOCIETY INTERFACE
Volume 8, Issue 62, Pages 1274-1280Publisher
ROYAL SOC
DOI: 10.1098/rsif.2010.0722
Keywords
intermediate filaments; entangled weavings; dilatant materials
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A novel technique to generate three-dimensional Euclidean weavings, composed of close-packed, periodic arrays of one-dimensional fibres, is described. Some of these weavings are shown to dilate by simple shape changes of the constituent fibres (such as fibre straightening). The free volume within a chiral cubic example of a dilatant weaving, the ideal conformation of the G(129) weaving related to the Sigma(+) rod packing, expands more than fivefold on filament straightening. This remarkable three-dimensional weaving, therefore, allows an unprecedented variation of packing density without loss of structural rigidity and is an attractive design target for materials. We propose that the G(129) weaving (ideal Sigma(+) weaving) is formed by keratin fibres in the outermost layer of mammalian skin, probably templated by a folded membrane.
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