Title: A 3D auxetic material based on intersecting double arrowheads (Phys. Status Solidi B 7/2016)
Abstract: Based on the double-arrowhead honeycomb structure that gives two-dimensional (2D) auxetic behavior, Teik-Cheng Lim (pp. 1252–1260) extends the concept to a 3D auxetic behavior by means of intersecting the double-arrowhead structure. The geometry of this structure can be tailor-made to control the Poisson's ratio between zero and negative infinity. A functionally graded structure can be made by changing the half angles gradually from one end of the structure to the other, thereby leading to a structure that becomes thin when bent in one direction and thickens when bent in the other direction. This structure can also exhibit partial auxeticity by changing the arrowheads parallel to one of the planes into a rhombus (kite) shape, thereby giving auxetic and conventional characteristics on the planes consisting of double arrowheads and rhombus, respectively. By combining the gradual change in the half angles with partial auxeticity, Lim demonstrates that a functionally graded structure, which displays a gradual change from auxetic to conventional in one plane and from conventional to auxetic in another plane, is possible.
Publication Year: 2016
Publication Date: 2016-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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