Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 252, Issue 7, Pages 1431-1434Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201552158
Keywords
auxetic; chirality; negative Poisson's ratio; thermal expansion
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Funding
- NSF [CMMI-1361832]
- DARPA-LLNL
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Lattices of controlled thermal expansion are presented based on planar chiral lattice structure with Poisson's ratio approaching -1. Thermal expansion values can be arbitrarily large positive or negative. A lattice was fabricated from bimetallic strips and the properties analyzed and studied experimentally. The effective thermal expansion coefficient of the lattice is about =-3.5x10-4K-1. This is much larger in magnitude than that of constituent metals. Nodes were observed to rotate as temperature was changed corresponding to a Cosserat thermoelastic solid. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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