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Slann A.,Advanced Composites Center for Innovation and Science University of Bristol8 1TR BristolUK | White W.,Advanced Composites Center for Innovation and Science University of Bristol8 1TR BristolUK | Scarpa F.,Advanced Composites Center for Innovation and Science University of Bristol8 1TR BristolUK | Boba K.,Advanced Composites Center for Innovation and Science University of Bristol8 1TR BristolUK | Farrow I.,Advanced Composites Center for Innovation and Science University of Bristol8 1TR BristolUK
Physica Status Solidi (B) Basic Research | Year: 2015

The work describes a cellular structure configuration with a rectangular perforation topology exhibiting auxetic (negative Poisson's ratio) in-plane behaviour. The rectangular voids used in this structure produce a rigid rotating squares effect. Changes in the sizing parameters of aspect ratio, intercell spacing, and number of unit cells are made through non-dimensional modelling. The effects on the key properties of in-plane Poisson's ratio, Young's modulus and shear modulus are investigated. Through numerical modelling and experimental testing the auxetic behaviour is confirmed, with increased negative Poisson's ratio values in comparison to rhomboidal patterns of perforations available in open literature. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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