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Proceedings Paper

Design of materials with extreme thermal expansion using a three-phase topology optimization method
Author(s): Ole Sigmund; Salvatore Torquato
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Paper Abstract

We show how composites with extremal or unusual thermal expansion coefficients can be designed using a numerical topology optimization method. The composites are composed of two different material phases and void. The optimization method is illustrated by designing materials having maximum thermal expansion, zero thermal expansion, and negative thermal expansion. Assuming linear elasticity, it is shown that materials with effective negative thermal expansion coefficients can be obtained by mixing two phases with positive thermal expansion coefficients and void. We also show that there is no mechanistic relationship between negative thermal expansion and negative Poisson's ratio.

Paper Details

Date Published: 14 February 1997
PDF: 9 pages
Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997); doi: 10.1117/12.267131
Show Author Affiliations
Ole Sigmund, Princeton Univ. (Denmark)
Salvatore Torquato, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 3040:
Smart Structures and Materials 1997: Smart Materials Technologies
Wilbur C. Simmons; Ilhan A. Aksay; Dryver R. Huston, Editor(s)

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