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Large Deformation Modeling of Dry and Saturated Geomaterials in Geotechnics and Tectonics Using Smoothed Particle Hydrodynamics
Large Deformation Modeling of Dry and Saturated Geomaterials in Geotechnics and Tectonics Using Smoothed Particle Hydrodynamics
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105001
- ISBN
- 9798290650098
- DDC
- 600
- 서명/저자
- Large Deformation Modeling of Dry and Saturated Geomaterials in Geotechnics and Tectonics Using Smoothed Particle Hydrodynamics
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 275 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Borja, Ronaldo.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약One of the primordial challenges of continuum-based computational modeling in geotechnics and the earth sciences consists of having to deal with the large deformations occurring in the post-failure regime after the localized failure of geomaterials. For mesh-based methods such as the conventional finite element method (FEM), frequent and expensive remeshing is often needed to circumvent the problem of mesh distortion when modeling problems involving large material deformations. This dissertation focuses on the smoothed particle hydrodynamics (SPH) method which is a meshfree Lagrangian continuum particle method offering a relatively computationally inexpensive alternative to the traditional mesh-based modeling paradigm. This dissertation explores the topics of faulting and strain localization in geologic media, simulating earthquake fault rupture and propagation with SPH, while exploiting several advantageous features of the method including the fact that SPH displays nonlocal properties and is able to capture the formation of shear bands without requiring the introduction of heterogeneities. Our simulations also consider the effect of soil layering or stratification on the trajectories and patterns of reverse faults, and through the use of constitutive models equipped with a softening response and critical-state type constitutive models, a rotation of shear bands with respect to the principal stress directions is observed, initially taking orientations close to the Roscoe angle, then to that of the Arthur angle, and lastly, close to that of the familiar Coulomb orientation. We next upscale this analysis beyond individual faults, considering the dynamics of accretionary wedges and mountain building as well as doubly vergent orogens, modeled through computational simulations mimicking sandbox-style experiments. Our simulations agree well with analogue benchmark experiments and also add new insights regarding competing deformation processes on both pro and retro side of the doubly vergent wedge, namely accretion and mass wasting. Overall, our findings indicate that SPH has great potential for future studies involving large deformations of the Earth's crust in tectonics and structural geology. In addition to shear bands and faults, we also propose a novel continuum damage model to describe the formation and propagation of compaction bands found in porous sedimentary rock. In contrast to the case of shear bands, the numerical model captures grain crushing and the subsequent abrupt onset of pore collapse, leading to a reduction in porosity and permeability. Cast in the context of the SPH method, we propose both an SPH discretized integral form of the nonlocal damage and an SPH-based discretization of a gradient enhanced damage model that use the SPH smoothing length, a numerical characteristic length scale, to help guarantee nonlocality.Because porous geologic media is often fluid saturated, and pore water significantly alters soil behavior and deformation, including in the post-failure regime of earth structures, we develop a new framework for performing undrained loading of soils using SPH. The proposed model combines critical state plasticity with a novel one-particle two-phase penalty-method based formulation for performing undrained loading in fully saturated soils, permitting the build up of pore water pressures under both shearing and compression. After substantial verification of the model against existing analytical solutions accounting for triaxial stress paths, we perform large-scale parallelized simulations of embankment failure involving a vast number of degrees of freedom in three-dimensions.
- 일반주제명
- Friction
- 일반주제명
- Shear tests
- 일반주제명
- Plate tectonics
- 일반주제명
- Failure
- 일반주제명
- Landslides & mudslides
- 일반주제명
- Fault lines
- 일반주제명
- Families & family life
- 일반주제명
- Deformation
- 일반주제명
- Levees & battures
- 일반주제명
- Fluid mechanics
- 일반주제명
- Boundary conditions
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798290650098
■035 ▼a(MiAaPQ)AAI32149729
■035 ▼a(MiAaPQ)Stanfordtf909wm5217
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼adel Castillo, Enrique Miguel.
■24510▼aLarge Deformation Modeling of Dry and Saturated Geomaterials in Geotechnics and Tectonics Using Smoothed Particle Hydrodynamics
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a275 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Borja, Ronaldo.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aOne of the primordial challenges of continuum-based computational modeling in geotechnics and the earth sciences consists of having to deal with the large deformations occurring in the post-failure regime after the localized failure of geomaterials. For mesh-based methods such as the conventional finite element method (FEM), frequent and expensive remeshing is often needed to circumvent the problem of mesh distortion when modeling problems involving large material deformations. This dissertation focuses on the smoothed particle hydrodynamics (SPH) method which is a meshfree Lagrangian continuum particle method offering a relatively computationally inexpensive alternative to the traditional mesh-based modeling paradigm. This dissertation explores the topics of faulting and strain localization in geologic media, simulating earthquake fault rupture and propagation with SPH, while exploiting several advantageous features of the method including the fact that SPH displays nonlocal properties and is able to capture the formation of shear bands without requiring the introduction of heterogeneities. Our simulations also consider the effect of soil layering or stratification on the trajectories and patterns of reverse faults, and through the use of constitutive models equipped with a softening response and critical-state type constitutive models, a rotation of shear bands with respect to the principal stress directions is observed, initially taking orientations close to the Roscoe angle, then to that of the Arthur angle, and lastly, close to that of the familiar Coulomb orientation. We next upscale this analysis beyond individual faults, considering the dynamics of accretionary wedges and mountain building as well as doubly vergent orogens, modeled through computational simulations mimicking sandbox-style experiments. Our simulations agree well with analogue benchmark experiments and also add new insights regarding competing deformation processes on both pro and retro side of the doubly vergent wedge, namely accretion and mass wasting. Overall, our findings indicate that SPH has great potential for future studies involving large deformations of the Earth's crust in tectonics and structural geology. In addition to shear bands and faults, we also propose a novel continuum damage model to describe the formation and propagation of compaction bands found in porous sedimentary rock. In contrast to the case of shear bands, the numerical model captures grain crushing and the subsequent abrupt onset of pore collapse, leading to a reduction in porosity and permeability. Cast in the context of the SPH method, we propose both an SPH discretized integral form of the nonlocal damage and an SPH-based discretization of a gradient enhanced damage model that use the SPH smoothing length, a numerical characteristic length scale, to help guarantee nonlocality.Because porous geologic media is often fluid saturated, and pore water significantly alters soil behavior and deformation, including in the post-failure regime of earth structures, we develop a new framework for performing undrained loading of soils using SPH. The proposed model combines critical state plasticity with a novel one-particle two-phase penalty-method based formulation for performing undrained loading in fully saturated soils, permitting the build up of pore water pressures under both shearing and compression. After substantial verification of the model against existing analytical solutions accounting for triaxial stress paths, we perform large-scale parallelized simulations of embankment failure involving a vast number of degrees of freedom in three-dimensions.
■590 ▼aSchool code: 0212.
■650 4▼aFriction
■650 4▼aShear tests
■650 4▼aPlate tectonics
■650 4▼aFailure
■650 4▼aLandslides & mudslides
■650 4▼aFault lines
■650 4▼aFamilies & family life
■650 4▼aDeformation
■650 4▼aLevees & battures
■650 4▼aFluid mechanics
■650 4▼aBoundary conditions
■690 ▼a0592
■690 ▼a0204
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359279▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


