Crossover from mean-field compression to collective phenomena in low-density foam-formed fiber material

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorMäkinen, Tero
dc.contributor.authorKoivisto, Juha
dc.contributor.authorPääkkönen, Elina
dc.contributor.authorKetoja, Jukka A.
dc.contributor.authorAlava, Mikko J.
dc.contributor.departmentComplex Systems and Materials
dc.contributor.departmentVTT Technical Research Centre of Finland
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2020-08-21T08:28:50Z
dc.date.available2020-08-21T08:28:50Z
dc.date.issued2020-08-07
dc.description| openaire: EC/H2020/857470/EU//NOMATEN
dc.description.abstractWe study the compression of low-weight foam-formed materials made out of wood fibers. Initially the stress-strain behavior follows mean-field like response, related to the buckling of fiber segments as dictated by the random three-dimensional geometry. Our Acoustic Emission (AE) measurements correlate with the predicted number of segment bucklings for increasing strain. However, the experiments reveal a transition to collective phenomena as the strain increases sufficiently. This is also seen in the gradual failure of the theory to account for the stress-strain curves. The collective avalanches exhibit scale-free features both as regards the AE energy distribution and the AE waiting time distributions with both exponents having values close to 2. In cyclic compression tests, significant increases in the accumulated acoustic energy are found only when the compression exceeds the displacement of the previous cycle, which further confirms other sources of acoustic events than fiber bending.en
dc.description.versionPeer revieweden
dc.format.extent7
dc.format.extent6819-6825
dc.format.mimetypeapplication/pdf
dc.identifier.citationMäkinen , T , Koivisto , J , Pääkkönen , E , Ketoja , J A & Alava , M J 2020 , ' Crossover from mean-field compression to collective phenomena in low-density foam-formed fiber material ' , Soft Matter , vol. 16 , no. 29 , pp. 6819-6825 . https://doi.org/10.1039/d0sm00286ken
dc.identifier.doi10.1039/d0sm00286k
dc.identifier.issn1744-683X
dc.identifier.issn1744-6848
dc.identifier.otherPURE UUID: 2502e609-d8d4-488d-9dd3-593d431336be
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/2502e609-d8d4-488d-9dd3-593d431336be
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dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/44802467/M_kinen_Crossover.d0sm00286k_1.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45791
dc.identifier.urnURN:NBN:fi:aalto-202008214786
dc.language.isoenen
dc.publisherROYAL SOC CHEMISTRY
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/857470/EU//NOMATEN
dc.relation.ispartofseriesSoft Matteren
dc.relation.ispartofseriesVolume 16, issue 29en
dc.rightsopenAccessen
dc.titleCrossover from mean-field compression to collective phenomena in low-density foam-formed fiber materialen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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