Show simple item record

dc.contributor.authorRorato, Riccardo
dc.contributor.authorArroyo Alvarez de Toledo, Marcos
dc.contributor.authorGens Solé, Antonio
dc.contributor.authorAndò, Edward
dc.contributor.authorViggiani, Gioacchino
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2022-03-14T19:37:11Z
dc.date.issued2021-03
dc.identifier.citationRorato, R. [et al.]. Image-based calibration of rolling resistance in discrete element models of sand. "Computers and geotechnics", Març 2021, vol. 131, p. 103929:1-103929:15.
dc.identifier.issn0266-352X
dc.identifier.otherhttps://www.researchgate.net/publication/348333767_Image-based_calibration_of_rolling_resistance_in_discrete_element_models_of_sand
dc.identifier.urihttp://hdl.handle.net/2117/364122
dc.description.abstractModels that introduce rolling resistance at the contact are widely employed in simulations using the discrete element method (DEM) to indirectly represent particle shape effects. This approach offers substantial computational benefits at the price of increased calibration complexity. This work proposes a method to simplify calibration of rolling resistance. The key element is an empirical relation between a contact parameter (rolling friction) and a 3D grain shape descriptor (true sphericity). Values of true sphericity can be obtained by image analysis of the grains, either directly by 3D acquisition or by correlation with simpler-to-obtain 2D shape measures. Evaluation of rolling friction is thus made independent from that of other model parameters. As an extra benefit, the variability of grain shape in natural sands can be directly mapped into the discrete model. A mapping between rolling friction and true sphericity is calibrated using specimen-scale and grain scale results from two triaxial compression tests on Hostun sand and Caicos ooids. The mapping is validated using different triaxial tests from the same sands and from other reference sands (Ottawa, Ticino). In the case of Ticino grain-shape acquisition is made in 2D, using an ordinary table scanner. The results obtained support this direct calibration procedure.
dc.description.sponsorshipThe support of EU through 645665 - GEO-RAMP - MSCA-RISE and of the Ministry of Economy of Spain through research Grant BIA2014-59467-R is gratefully acknowledged. Laboratoire 3SR is part of the LabEx Tec 21 (Investissements d’Avenir - grant agreement n_ANR-11-LABX-0030).
dc.language.isoeng
dc.publisherElsevier
dc.rights© 2021. Elsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
dc.subject.lcshSoil mechanics -- Mathematical models
dc.subject.otherDiscrete element method
dc.subject.otherRolling resistance
dc.subject.otherParticle shape
dc.subject.otherX-rays micro tomography
dc.subject.otherTriaxial test
dc.subject.otherShear resistance
dc.titleImage-based calibration of rolling resistance in discrete element models of sand
dc.typeArticle
dc.subject.lemacMecànica dels sòls -- Models matemàtics
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.identifier.doi10.1016/j.compgeo.2020.103929
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/abs/pii/S0266352X20304924
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac32487481
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/645665/EU/Geohazards: Risk Assessment, Mitigation and Prevention/GEO-RAMP
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//BIA2014-59467-R/ES/SIMULACION AVANZADA PARA OPTIMIZAR EL RECONOCIMIENTO GEOTECNICO SUBMARINO/
dc.date.lift2023-01-05
local.citation.authorRorato, R.; Arroyo, M.; Gens, A.; Andò, E.; Viggiani, G.
local.citation.publicationNameComputers and geotechnics
local.citation.volume131
local.citation.startingPage103929:1
local.citation.endingPage103929:15
local.requestitem.embargattrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record