Micromechanical approach to effective viscoelastic behavior of jointed rocks
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/220134 |
Resumo: | Assessing the overall instantaneous behavior and strength properties of jointed materials have been the subject of important investigations in the last decades, including phenomenological or micromechanics-based contributions. However, less attention has been dedicated to delayed component of deformation in such media. This issue is addressed in this paper, which is devoted to the formulation of a micromechanical approach to effective viscoelastic properties of jointed rocks with consideration of constituents aging. At the scale of representative elementary volume (REV), the joints are modeled as planar interfaces whose behavior is described by means of generalized viscoelastic state equations under normal and shear loading conditions. Closed-form expressions for the homogenized creep tensor are derived from solving an appropriate viscoelastic concentration problem stated on the REV. The local strain and displacement jump fields are analyzed by extending the concept of strain concentration to relate the components of joint displacement jump to macroscopic strain. Main features of the theoretical overall creep behavior, such as the anisotropy associated with the privileged joint orientations, are highlighted through explicit formulations in some particular configurations of the jointed medium. Finally, the ability of the approach to accurately reproduce the creep behavior of jointed media is assessed by comparison with experimental data as well as with finite element solutions derived in the context of multilayered stratified composite modeling. |
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Maghous, SamirAguiar, Cássio Barros deRossi, Rodrigo2021-04-21T04:27:03Z20211365-1609http://hdl.handle.net/10183/220134001124359Assessing the overall instantaneous behavior and strength properties of jointed materials have been the subject of important investigations in the last decades, including phenomenological or micromechanics-based contributions. However, less attention has been dedicated to delayed component of deformation in such media. This issue is addressed in this paper, which is devoted to the formulation of a micromechanical approach to effective viscoelastic properties of jointed rocks with consideration of constituents aging. At the scale of representative elementary volume (REV), the joints are modeled as planar interfaces whose behavior is described by means of generalized viscoelastic state equations under normal and shear loading conditions. Closed-form expressions for the homogenized creep tensor are derived from solving an appropriate viscoelastic concentration problem stated on the REV. The local strain and displacement jump fields are analyzed by extending the concept of strain concentration to relate the components of joint displacement jump to macroscopic strain. Main features of the theoretical overall creep behavior, such as the anisotropy associated with the privileged joint orientations, are highlighted through explicit formulations in some particular configurations of the jointed medium. Finally, the ability of the approach to accurately reproduce the creep behavior of jointed media is assessed by comparison with experimental data as well as with finite element solutions derived in the context of multilayered stratified composite modeling.application/pdfengInternational journal of rock mechanics and mining sciences (1997). Oxford. Vol. 139 (Mar. 2021), [Article] 104581, 16 p.Mecânica das rochasViscoelasticidadeMicromecânicaJointed rockAging viscoelasticityMicromechanicsMicromechanical approach to effective viscoelastic behavior of jointed rocksEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001124359.pdf.txt001124359.pdf.txtExtracted Texttext/plain92313http://www.lume.ufrgs.br/bitstream/10183/220134/2/001124359.pdf.txt871e71e790255d83eac3c1824d9d71a0MD52ORIGINAL001124359.pdfTexto completo (inglês)application/pdf6409874http://www.lume.ufrgs.br/bitstream/10183/220134/1/001124359.pdf5db05994571fec325f00fd37addd27a8MD5110183/2201342021-08-18 04:38:58.404482oai:www.lume.ufrgs.br:10183/220134Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-08-18T07:38:58Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
title |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
spellingShingle |
Micromechanical approach to effective viscoelastic behavior of jointed rocks Maghous, Samir Mecânica das rochas Viscoelasticidade Micromecânica Jointed rock Aging viscoelasticity Micromechanics |
title_short |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
title_full |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
title_fullStr |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
title_full_unstemmed |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
title_sort |
Micromechanical approach to effective viscoelastic behavior of jointed rocks |
author |
Maghous, Samir |
author_facet |
Maghous, Samir Aguiar, Cássio Barros de Rossi, Rodrigo |
author_role |
author |
author2 |
Aguiar, Cássio Barros de Rossi, Rodrigo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Maghous, Samir Aguiar, Cássio Barros de Rossi, Rodrigo |
dc.subject.por.fl_str_mv |
Mecânica das rochas Viscoelasticidade Micromecânica |
topic |
Mecânica das rochas Viscoelasticidade Micromecânica Jointed rock Aging viscoelasticity Micromechanics |
dc.subject.eng.fl_str_mv |
Jointed rock Aging viscoelasticity Micromechanics |
description |
Assessing the overall instantaneous behavior and strength properties of jointed materials have been the subject of important investigations in the last decades, including phenomenological or micromechanics-based contributions. However, less attention has been dedicated to delayed component of deformation in such media. This issue is addressed in this paper, which is devoted to the formulation of a micromechanical approach to effective viscoelastic properties of jointed rocks with consideration of constituents aging. At the scale of representative elementary volume (REV), the joints are modeled as planar interfaces whose behavior is described by means of generalized viscoelastic state equations under normal and shear loading conditions. Closed-form expressions for the homogenized creep tensor are derived from solving an appropriate viscoelastic concentration problem stated on the REV. The local strain and displacement jump fields are analyzed by extending the concept of strain concentration to relate the components of joint displacement jump to macroscopic strain. Main features of the theoretical overall creep behavior, such as the anisotropy associated with the privileged joint orientations, are highlighted through explicit formulations in some particular configurations of the jointed medium. Finally, the ability of the approach to accurately reproduce the creep behavior of jointed media is assessed by comparison with experimental data as well as with finite element solutions derived in the context of multilayered stratified composite modeling. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-04-21T04:27:03Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/220134 |
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1365-1609 |
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001124359 |
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http://hdl.handle.net/10183/220134 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
International journal of rock mechanics and mining sciences (1997). Oxford. Vol. 139 (Mar. 2021), [Article] 104581, 16 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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