Composites with extremal thermal expansion coefficients

18 November 1996

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 69 (21) , 3203-3205
https://doi.org/10.1063/1.117961

Abstract

We design three‐phase composites having maximum thermal expansion, zero thermal expansion, or negative thermal expansion using a numerical topologyoptimization method. It is shown that composites with effective negative thermal expansion can be obtained by mixing two phases of positive thermal expansions with a void phase. We also show that there is no mechanistic relationship between negative thermal expansion and negative Poisson’s ratio.

Keywords

PIEZOELECTRICITY
NEGATIVE THERMAL EXPANSION
THERMAL EXPANSION COEFFICIENT
TOPOLOGY OPTIMIZATION
OPTIMIZATION
COMPOSITE MATERIAL
DESIGN
ELASTICITY
COMPOSITE MATERIALS
MATERIALS SCIENCE
POISSON RATIO
THERMAL EXPANSION

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