Flexible Cube Tilt Lattice with Anisotropic Cosserat Effects and Negative Poisson's Ratio | Zendy

Rueger Zach | Zendy; Ha Chan Soo | Zendy; Lakes Roderic S. | Zendy

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Flexible Cube Tilt Lattice with Anisotropic Cosserat Effects and Negative Poisson's Ratio

Author(s) -

Rueger Zach,

Ha Chan Soo,

Lakes Roderic S.

Publication year - 2019

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.201800512

Subject(s) - auxetics , torsion (gastropod) , anisotropy , poisson's ratio , elasticity (physics) , materials science , poisson distribution , lattice (music) , condensed matter physics , composite material , mathematics , mechanics , physics , optics , medicine , statistics , surgery , acoustics

A 3D lattice structure consisting of pivoting cubes with flexible links at the corners is presented. It exhibits anisotropic negative Poisson's ratio −0.54 and −0.75. Size effects occur in torsion and bending; these effects are consistent with Cosserat elasticity but not with classical elasticity. Cosserat elastic solids exhibit sensitivity to strain gradients; size effects occur in torsion and bending; also reduction in stress concentrations. The observed Cosserat effects also reveal anisotropy.

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