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dc.contributor.authorRorato, Riccardo
dc.contributor.authorArroyo Alvarez de Toledo, Marcos
dc.contributor.authorAndò, Edward
dc.contributor.authorGens Solé, Antonio
dc.contributor.authorViggiani, Gioacchino
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2020-12-09T12:46:55Z
dc.date.available2021-10-13T00:25:56Z
dc.date.issued2020-11
dc.identifier.citationRorato, R. [et al.]. Linking shape and rotation of grains during triaxial compression of sand. "Granular matter", Novembre 2020, vol. 22, núm. 4, p. 88:1-88:21.
dc.identifier.issn1434-5021
dc.identifier.urihttp://hdl.handle.net/2117/334123
dc.descriptionThe final publication is available at Springer via http://dx.doi.org/10.1007/s10035-020-01058-2
dc.description.abstractParticle shape has a strong effect on the mechanical response of coarse soils. This has been usually observed examining specimen-scale or engineering-scale responses, which are the sum of many microscale interactions. In this work we observe the effects of particle shape directly at the microscale level. X-ray tomography (µ-CT) of two sand specimens is exploited to measure three-dimensional particle shape descriptors but also to track individual particle motions during triaxial compression. A discrete digital volume correlation algorithm is employed to track the motion of individual grains (around 50,000 for each sand specimen) during the test and measure, with good precision, their cumulated displacements and rotations. The specimens examined failed in a clearly localised shear mode. Advantage is taken of this to obtain data relevant for very different kinematical regimes: one uniform and more constrained and the other close to critical state. A direct comparison between the shape and kinematic databases shows to what degree particle shape descriptors are related to observed kinematics. It appears that true sphericity is a good predictor of upper bound rotational restraint.
dc.description.sponsorshipThe work here described has been supported by the Spanish Ministry of Economy through Grants BIA2014-59467-R and BIA2017-84752-R. Laboratoire 3SR is part of the LabEx Tec21 (Investissements d’Avenir - Grant Agreement nANR-11-LABX-0030).
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
dc.subject.lcshSoil mechanics--Testing
dc.subject.otherLaboratory equipment
dc.subject.otherMicroscopy
dc.subject.otherParticle-scale behaviour
dc.subject.otherSands
dc.subject.otherShear strength
dc.subject.otherStatistical analysis
dc.titleLinking shape and rotation of grains during triaxial compression of sand
dc.typeArticle
dc.subject.lemacMecànica dels sòls -- Proves
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.identifier.doi10.1007/s10035-020-01058-2
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s10035-020-01058-2
dc.rights.accessOpen Access
local.identifier.drac29552334
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//BIA2014-59467-R/ES/SIMULACION AVANZADA PARA OPTIMIZAR EL RECONOCIMIENTO GEOTECNICO SUBMARINO/
dc.relation.projectidinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/BIA2017-84752-R/ES/INESTABILIDAD HIDROMECANICA EN SUELOS: DETECCION Y EVALUACION/
local.citation.authorRorato, R.; Arroyo, M.; Andò, E.; Gens, A.; Viggiani, G.
local.citation.publicationNameGranular matter
local.citation.volume22
local.citation.number4
local.citation.startingPage88:1
local.citation.endingPage88:21


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