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Cyclic deformation of bidisperse two-dimensional foams

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dc.contributor.authorVaz, M. Fátima
dc.contributor.authorCox, S. J.
dc.contributor.authorTeixeira, Paulo
dc.date.accessioned2012-09-11T10:34:08Z
dc.date.available2012-09-11T10:34:08Z
dc.date.issued2011
dc.description.abstractIn-plane deformation of foams was studied experimentally by subjecting bidisperse foams to cycles of traction and compression at a prescribed rate. Each foam contained bubbles of two sizes with given area ratio and one of three initial arrangements: sorted perpendicular to the axis of deformation (iso-strain), sorted parallel to the axis of deformation (iso-stress), or randomly mixed. Image analysis was used to measure the characteristics of the foams, including the number of edges separating small from large bubbles N-sl, the perimeter (surface energy), the distribution of the number of sides of the bubbles, and the topological disorder mu(2)(N). Foams that were initially mixed were found to remain mixed after the deformation. The response of sorted foams, however, depended on the initial geometry, including the area fraction of small bubbles and the total number of bubbles. For a given experiment we found that (i) the perimeter of a sorted foam varied little; (ii) each foam tended towards a mixed state, measured through the saturation of N-sl; and (iii) the topological disorder mu(2)(N) increased up to an "equilibrium" value. The results of different experiments showed that (i) the change in disorder, Delta mu(2)(N), decreased with the area fraction of small bubbles under iso-strain, but was independent of it under iso-stress; and (ii) Delta mu(2)(N) increased with Delta N-sl under iso-strain, but was again independent of it under iso-stress. We offer explanations for these effects in terms of elementary topological processes induced by the deformations that occur at the bubble scale.por
dc.identifier.citationVAZ, M. Fátima; COX, S. J.; TEIXEIRA, Paulo I. C. - Cyclic deformation of bidisperse two-dimensional foams. Philosophical Magazine. ISSN 1478-6435. Volume 91, N.º 34 (2011), pp.4345-4356por
dc.identifier.issn1478-6435
dc.identifier.issn1478-6443
dc.identifier.urihttp://hdl.handle.net/10400.21/1765
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherTaylor & Francis LTDpor
dc.subjectTwo-Dimensional Foamspor
dc.subjectUniaxial Deformationpor
dc.subjectSegregation and Mixingpor
dc.titleCyclic deformation of bidisperse two-dimensional foamspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxonpor
oaire.citation.endPage4356por
oaire.citation.issue34por
oaire.citation.startPage4345por
oaire.citation.titlePhilosophical Magazinepor
oaire.citation.volume91por
person.familyNameTeixeira
person.givenNamePaulo
person.identifier.ciencia-idB31A-0CBD-8AC4
person.identifier.orcid0000-0003-2315-2261
person.identifier.ridA-2682-2009
person.identifier.scopus-author-id7005895098
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication35a012c6-2e8b-402f-9b82-065843fce9aa
relation.isAuthorOfPublication.latestForDiscovery35a012c6-2e8b-402f-9b82-065843fce9aa

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