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Tailorable Stiffness Chiral Metastructure (Phys. Status Solidi RRL 10/2017)
Author(s) -
Runkel Falk,
Molinari Giulio,
Arrieta Andres F.,
Ermanni Paolo
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201770352
Subject(s) - curvature , topology (electrical circuits) , lattice (music) , hexagonal crystal system , stiffness , transverse plane , metamaterial , materials science , hexagonal lattice , physics , geometry , structural engineering , composite material , mathematics , condensed matter physics , engineering , acoustics , crystallography , chemistry , optoelectronics , combinatorics , antiferromagnetism
Runkel et al. (article no. 1700233 ) propose a novel periodic cellular solid exhibiting extreme tunability of its mechanical response in the small and large displacement regime. The periodic medium is based on a hexagonal chiral lattice topology, modified by introducing transverse curvature in the ligaments, key to the resulting unconventional behavior. The unique unit cell topology allows to exploit different levels of structural hierarchy for tailoring the mechanical behavior of the continuous medium. The cover illustration shows basic triangular elements of the proposed chiral lattice – whose performance is investigated numerically and experimentally in the article – of different sizes and at different angles. On the right, a periodic medium exhibiting the unique mechanical response under compressive loads can be seen. The structure is assembled by connecting basic 3D printed elements at their cylindrical nodes.