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Observation of Squeeze–Twist Coupling in a Chiral 3D Isotropic Lattice
Author(s) -
Li Jianheng,
Ha Chan Soo,
Lakes Roderic S.
Publication year - 2020
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.201900140
Subject(s) - twist , poisson's ratio , isotropy , lattice (music) , elasticity (physics) , poisson distribution , auxetics , physics , chirality (physics) , finite element method , materials science , condensed matter physics , geometry , mathematics , quantum mechanics , chiral perturbation theory , thermodynamics , pion , statistics , acoustics , nambu–jona lasinio model
A chiral 3D lattice is designed, made by 3D printing, and studied experimentally. The lattice exhibits squeeze–twist coupling and a Poisson's ratio near zero. Squeeze–twist coupling does not occur in classical elasticity which makes no provision for chirality. By contrast, chiral effects are allowed in Cosserat elasticity. An experimental squeeze–twist coupling strain ratio on the order of unity and a Poisson's ratio near zero are in reasonable agreement with prior finite element analysis of a lattice with similar structure, for which negative Poisson's ratio is anticipated for a sufficient number of cells.