Composites with extremal thermal expansion coefficients

Ole Sigmund, S. Torquato

Research output: Contribution to journalJournal articleResearchpeer-review


We design three‐phase composites having maximum thermal expansion, zero thermal expansion, or negative thermal expansion using a numerical topology optimization 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. © 1996 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Issue number21
Pages (from-to)3203
Publication statusPublished - 1996
Externally publishedYes


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