Strain effects on thermal fluctuations in soft solids: Butterfly patterns

Y. Rabin, R. Bruinsma

Research output: Contribution to journalLetterpeer-review

47 Scopus citations

Abstract

We present a phenomenological Landau-de Gennes-type theory of strain effects on concentration fluctuations in «soft» elastic two-component solids. Introducing concentration-dependent elastic moduli and a coupling between the strain and concentration fields we find that, for systems which exhibit nearly linear elastic response to large, uniaxially applied strain, there is strong enhancement of thermal fluctuations with wave vectors along the elongation axis. We calculate the structure factor and find that the equal intensity lines produce «butterfly» patterns akin to those observed in neutron scattering from deformed rubbers, gels and mixtures of molten polymers.

Original languageEnglish
Pages (from-to)79-85
Number of pages7
JournalEPL
Volume20
Issue number1
DOIs
StatePublished - 1 Sep 1992

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