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Geo-Interface Modeling in the Material Point Method.
Geo-Interface Modeling in the Material Point Method.
상세정보
- 자료유형
- 학위논문(국외)
- 기본표목-개인명
- 표제와 책임표시사항
- Geo-Interface Modeling in the Material Point Method.
- 발행, 배포, 간사 사항
- 발행, 배포, 간사 사항
- 형태사항
- 266 p.
- 일반주기
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 일반주기
- Advisor: Soga, Kenichi.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Berkeley, 2025.
- 요약 등 주기
- 요약Interface methods, particularly nonconforming interfaces, are an important aspect of modeling in the Material Point Method (MPM). The Material Point Method (MPM) is a numerical method developed for large-deformations, such as geotechnical runout analyses. MPM features moving material points (MPs) and a fixed computational grid which are not geometrically aligned. Material information is stored in the MPs, then mapped back and forth to the computational grid to solve the governing equations. The extra mapping steps, compared to FEM, make MPM relatively expensive. Certain boundary conditions can help reduce the extents of the model, thus reducing computational cost. However, application of boundary conditions or contact methods becomes challenging due to the misalignment of the material domain relative to the computational domain. Nonconforming interfaces address this challenge (rather than using mesh-conforming interfaces which require irregular mesh to capture complex geometry) allowing for regular mesh and, subsequently, decreasing MPM cell-crossing error.An improved levelset-barrier method is proposed in MPM, considering specific applications to geotechnical engineering problems. The method includes novel contact conditions, a geotechnical MPM parameterization, and the addition of adhesional resistance given its importance in undrained analysis. The improved levelset-barrier method is validated using several benchmark cases, showing improvements in accuracy, precision, and convergence rate relative to the original method.Two large-scale geotechnical case studies are covered: the Lower San Fernando Dam failure and the Oso Landslide. The former makes use of the virtual stress boundary condition, for nonconforming and adaptive reservoir pressure on the deforming embankment, and a conforming adhesive boundary condition for basal materials and the special interface with the reservoir bottom. The latter uses the improved levelset-barrier method to replace static background material, defined by LEM slip surfaces, for two stages of runout. Both case studies represent improvements relative to previous studies.Realistic visualizations of geotechnical MPM results are created in the VFX software Houdini. Processes are presented for incorporating scientific results, including one-way coupling of visual features. Results include a visualization of the Lower San Fernando Dam with animated water, concrete features, and grass. The goal is to intuitively understand model context and aid in interpretation of the results. These enhanced visualizations are a valuable tool for scientific communication with adjacent fields and non-technical audiences.
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 비통제 색인어
- 부출표목-단체명
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 원문정보보기
MARC
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■006m o d
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■020 ▼a9798297601314
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.11
■1001 ▼aTalbot, Lauren Eliza DeWitt.
■24510▼aGeo-Interface Modeling in the Material Point Method.
■260 ▼a[S.l.]▼bUniversity of California, Berkeley. ▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a266 p.
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Soga, Kenichi.
■5021 ▼aThesis (Ph.D.)--University of California, Berkeley, 2025.
■520 ▼aInterface methods, particularly nonconforming interfaces, are an important aspect of modeling in the Material Point Method (MPM). The Material Point Method (MPM) is a numerical method developed for large-deformations, such as geotechnical runout analyses. MPM features moving material points (MPs) and a fixed computational grid which are not geometrically aligned. Material information is stored in the MPs, then mapped back and forth to the computational grid to solve the governing equations. The extra mapping steps, compared to FEM, make MPM relatively expensive. Certain boundary conditions can help reduce the extents of the model, thus reducing computational cost. However, application of boundary conditions or contact methods becomes challenging due to the misalignment of the material domain relative to the computational domain. Nonconforming interfaces address this challenge (rather than using mesh-conforming interfaces which require irregular mesh to capture complex geometry) allowing for regular mesh and, subsequently, decreasing MPM cell-crossing error.An improved levelset-barrier method is proposed in MPM, considering specific applications to geotechnical engineering problems. The method includes novel contact conditions, a geotechnical MPM parameterization, and the addition of adhesional resistance given its importance in undrained analysis. The improved levelset-barrier method is validated using several benchmark cases, showing improvements in accuracy, precision, and convergence rate relative to the original method.Two large-scale geotechnical case studies are covered: the Lower San Fernando Dam failure and the Oso Landslide. The former makes use of the virtual stress boundary condition, for nonconforming and adaptive reservoir pressure on the deforming embankment, and a conforming adhesive boundary condition for basal materials and the special interface with the reservoir bottom. The latter uses the improved levelset-barrier method to replace static background material, defined by LEM slip surfaces, for two stages of runout. Both case studies represent improvements relative to previous studies.Realistic visualizations of geotechnical MPM results are created in the VFX software Houdini. Processes are presented for incorporating scientific results, including one-way coupling of visual features. Results include a visualization of the Lower San Fernando Dam with animated water, concrete features, and grass. The goal is to intuitively understand model context and aid in interpretation of the results. These enhanced visualizations are a valuable tool for scientific communication with adjacent fields and non-technical audiences.
■590 ▼aSchool code: 0028.
■650 4▼aMaterials science.
■650 4▼aGeotechnology.
■650 4▼aEnvironmental engineering.
■653 ▼aComputational geomechanics
■653 ▼aGeotechnical engineering
■653 ▼aLarge deformations
■653 ▼aMaterial Point Method
■653 ▼aNonconforming interfaces
■653 ▼aVisualization
■690 ▼a0543
■690 ▼a0775
■690 ▼a0794
■690 ▼a0428
■71020▼aUniversity of California, Berkeley▼bCivil and Environmental Engineering.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0028
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359370▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
