DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choo, Jinhyun | ko |
dc.contributor.author | Sun, WaiChing | ko |
dc.date.accessioned | 2022-01-21T06:41:57Z | - |
dc.date.available | 2022-01-21T06:41:57Z | - |
dc.date.created | 2022-01-21 | - |
dc.date.created | 2022-01-21 | - |
dc.date.created | 2022-01-21 | - |
dc.date.created | 2022-01-21 | - |
dc.date.created | 2022-01-21 | - |
dc.date.issued | 2018-03 | - |
dc.identifier.citation | Computer Methods in Applied Mechanics and Engineering, v.330, pp.1 - 32 | - |
dc.identifier.issn | 0045-7825 | - |
dc.identifier.uri | http://hdl.handle.net/10203/291939 | - |
dc.description.abstract | The failure behavior of geological materials depends heavily on confining pressure and strain rate. Under a relatively low confining pressure, these materials tend to fail by brittle, localized fracture, but as the confining pressure increases, they show a growing propensity for ductile, diffuse failure accompanying plastic flow. Furthermore, the rate of deformation often exerts control on the brittleness. Here we develop a theoretical and computational modeling framework that encapsulates this variety of failure modes and their brittle-ductile transition. The framework couples a pressure-sensitive plasticity model with a phase-field approach to fracture which can simulate complex fracture propagation without tracking its geometry. We derive a phase-field formulation for fracture in elastic-plastic materials as a balance law of microforce, in a new way that honors the dissipative nature of the fracturing processes. For physically meaningful and numerically robust incorporation of plasticity into the phase-field model, we introduce several new ideas including the use of phase-field effective stress for plasticity, and the dilative/compactive split and rate-dependent storage of plastic work. We construct a particular class of the framework by employing a Drucker-Prager plasticity model with a compression cap, and demonstrate that the proposed framework can capture brittle fracture, ductile flow, and their transition due to confining pressure and strain (C) 2017 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | Elsevier | - |
dc.title | Coupled phase-field and plasticity modeling of geological materials: From brittle fracture to ductile flow | - |
dc.type | Article | - |
dc.identifier.wosid | 000425735700001 | - |
dc.identifier.scopusid | 2-s2.0-85034091680 | - |
dc.type.rims | ART | - |
dc.citation.volume | 330 | - |
dc.citation.beginningpage | 1 | - |
dc.citation.endingpage | 32 | - |
dc.citation.publicationname | Computer Methods in Applied Mechanics and Engineering | - |
dc.identifier.doi | 10.1016/j.cma.2017.10.009 | - |
dc.contributor.localauthor | Choo, Jinhyun | - |
dc.contributor.nonIdAuthor | Sun, WaiChing | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Geomaterials | - |
dc.subject.keywordAuthor | Phase field | - |
dc.subject.keywordAuthor | Plasticity | - |
dc.subject.keywordAuthor | Fracture | - |
dc.subject.keywordAuthor | Strain localization | - |
dc.subject.keywordAuthor | Brittle-ductile transition | - |
dc.subject.keywordPlus | CAM-CLAY PLASTICITY | - |
dc.subject.keywordPlus | UNSATURATED POROUS CONTINUA | - |
dc.subject.keywordPlus | FINITE DEFORMATION RANGE | - |
dc.subject.keywordPlus | TRUE TRIAXIAL STRESSES | - |
dc.subject.keywordPlus | STRAIN LOCALIZATION | - |
dc.subject.keywordPlus | MATHEMATICAL FRAMEWORK | - |
dc.subject.keywordPlus | DAMAGE MODEL | - |
dc.subject.keywordPlus | FAILURE CHARACTERISTICS | - |
dc.subject.keywordPlus | FRICTIONAL MATERIALS | - |
dc.subject.keywordPlus | STRONG DISCONTINUITY | - |
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