Avalanches in 2D Dislocation Systems: Plastic Yielding Is Not Depinning

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorIspánovity, Péter Dusán
dc.contributor.authorLaurson, Lasse
dc.contributor.authorZaiser, Michael
dc.contributor.authorGroma, István
dc.contributor.authorZapperi, Stefano
dc.contributor.authorAlava, Mikko J.
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.date.accessioned2015-11-25T10:02:33Z
dc.date.available2015-11-25T10:02:33Z
dc.date.issued2014
dc.description.abstractWe study the properties of strain bursts (dislocation avalanches) occurring in two-dimensional discrete dislocation dynamics models under quasistatic stress-controlled loading. Contrary to previous suggestions, the avalanche statistics differ fundamentally from predictions obtained for the depinning of elastic manifolds in quenched random media. Instead, we find an exponent τ=1 of the power-law distribution of slip or released energy, with a cutoff that increases exponentially with the applied stress and diverges with system size at all stresses. These observations demonstrate that the avalanche dynamics of 2D dislocation systems is scale-free at every applied stress and, therefore, cannot be envisaged in terms of critical behavior associated with a depinning transition.en
dc.description.versionPeer revieweden
dc.format.extent235501/1-5
dc.format.mimetypeapplication/pdfen
dc.identifier.citationIspánovity, Péter Dusán & Laurson, Lasse & Zaiser, Michael & Groma, István & Zapperi, Stefano & Alava, Mikko J. 2014. Avalanches in 2D Dislocation Systems: Plastic Yielding Is Not Depinning. Physical Review Letters. Volume 112, Issue 23. 235501/1-5. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.112.235501.en
dc.identifier.doi10.1103/physrevlett.112.235501
dc.identifier.issn0031-9007 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/18767
dc.identifier.urnURN:NBN:fi:aalto-201511255278
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Lettersen
dc.relation.ispartofseriesVolume 112, Issue 23
dc.rights© 2014 American Physical Society (APS). This is the accepted version of the following article: Ispánovity, Péter Dusán & Laurson, Lasse & Zaiser, Michael & Groma, István & Zapperi, Stefano & Alava, Mikko J. 2014. Avalanches in 2D Dislocation Systems: Plastic Yielding Is Not Depinning. Physical Review Letters. Volume 112, Issue 23. 235501/1-5. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.112.235501, which has been published in final form at http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.235501.en
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keyworddislocation avalanchesen
dc.subject.keywordquasistatic stress-controlled loadingen
dc.subject.otherPhysicsen
dc.titleAvalanches in 2D Dislocation Systems: Plastic Yielding Is Not Depinningen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
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