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dc.contributor.authorPapamichos, Euripides
dc.date.accessioned2019-12-17T10:48:43Z
dc.date.available2019-12-17T10:48:43Z
dc.date.created2019-10-01T17:25:46Z
dc.date.issued2019
dc.identifier.citationGeomechanics for Energy and the Environment. 2019, 21 1-15.nb_NO
dc.identifier.issn2352-3808
dc.identifier.urihttp://hdl.handle.net/11250/2633595
dc.description.abstractFour failure criteria, a simplified Mohr–Coulomb, a Mohr–Coulomb, a von Mises and a Drucker–Prager model are considered for borehole failure and sand onset predictions. The von Mises is a special case of the Drucker–Prager. The resulting analytical expressions are suitable for implementation in the analytical software for sand onset and sand mass analyses. The models are calibrated and validated against experimental data for hollow cylinder and hollow prism tests on Red Wildmoor sandstone. The analysis shows that a Drucker–Prager model is necessary to capture the experimentally observed effect of axial stress on hole failure. The simplified Mohr–Coulomb model shows no such effect, while the Mohr–Coulomb model shows an effect only at high values of axial stress. The Drucker–Prager model can match satisfactorily the experimental results. It requires, however, the calibration of an additional material parameter which can be done on anisotropic loading hollow prism tests. The models include also a lateral stress anisotropy parameter and a field calibration factor to allow for better approximation of available field or laboratory data.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectSand productionnb_NO
dc.subjectAnisotropic stressesnb_NO
dc.subjectSand onsetnb_NO
dc.subjectHollow cylinder testsnb_NO
dc.subjectHole failure modelsnb_NO
dc.titleAnalytical models for onset of sand production under isotropic and anisotropic stresses in laboratory testsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder©2019 The Author. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).nb_NO
dc.source.pagenumber1-15nb_NO
dc.source.volume21nb_NO
dc.source.journalGeomechanics for Energy and the Environmentnb_NO
dc.identifier.doi10.1016/j.gete.2019.100149
dc.identifier.cristin1732691
dc.relation.projectNorges forskningsråd: 268159nb_NO
cristin.unitcode7401,80,7,0
cristin.unitnamePetroleum
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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