Boundary Layer Effect on Behavior of Discrete Models

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dc.contributor.authorEliáš, Jancs
dc.coverage.issue2cs
dc.coverage.volume10cs
dc.date.issued2017-02-10cs
dc.description.abstractThe paper studies systems of rigid bodies with randomly generated geometry interconnected by normal and tangential bonds. The stiffness of these bonds determines the macroscopic elastic modulus while the macroscopic Poisson’s ratio of the system is determined solely by the normal/tangential stiffness ratio. Discrete models with no directional bias have the same probability of element orientation for any direction and therefore the same mechanical properties in a statistical sense at any point and direction. However, the layers of elements in the vicinity of the boundary exhibit biased orientation, preferring elements parallel with the boundary. As a consequence, when strain occurs in this direction, the boundary layer becomes stiffer than the interior for the normal/tangential stiffness ratio larger than one, and vice versa. Nonlinear constitutive laws are typically such that the straining of an element in shear results in higher strength and ductility than straining in tension. Since the boundary layer tends, due to the bias in the elemental orientation, to involve more tension than shear at the contacts, it also becomes weaker and less ductile. The paper documents these observations and compares them to the results of theoretical analysis.en
dc.formattextcs
dc.format.extent1-16cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMaterials . 2017, vol. 10, issue 2, p. 1-16.en
dc.identifier.doi10.3390/ma10020157cs
dc.identifier.issn1996-1944cs
dc.identifier.orcid0000-0001-9453-4078cs
dc.identifier.other134896cs
dc.identifier.researcheridC-1179-2014cs
dc.identifier.scopus36131177500cs
dc.identifier.urihttp://hdl.handle.net/11012/181099
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMaterialscs
dc.relation.urihttp://www.mdpi.com/1996-1944/10/2/157cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1944/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectboundary layeren
dc.subjectwall effecten
dc.subjectdiscrete modelen
dc.subjectelasticityen
dc.subjectfractureen
dc.subjectconcreteen
dc.titleBoundary Layer Effect on Behavior of Discrete Modelsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-134896en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:45:20en
sync.item.modts2025.01.17 15:14:05en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav stavební mechanikycs
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