2004 Fiscal Year Final Research Report Summary
Measurement system of shear banding formation of granular materials based on the particle image velocimetry(PIV) with the image processing device and the meshless analysis system for bifurcation behavior of the specimen
| Project/Area Number |
14360144
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | OKAYAMA UNIVERSITY |
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Principal Investigator |
MURAKAMI Akira Okayama University, Grad.School of Natural Sci.& Tech., Professor, 大学院・自然科学研究科, 教授 (80157742)
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| Co-Investigator(Kenkyū-buntansha) |
MURAYAMA Yasuo Okayama University, Dept.of Environ.Sci.& Tech., Professor, 環境理工学部, 教授 (20346414)
NISHIMURA Shin'ichi Okayama University, Grad.School of Natural Sci.& Tech., Assoc.Professor, 保健環境センター, 助教授 (30198501)
NISHIYAMA Tatsuro Okayama University, Dept.of Environ.Sci.& Tech., Research Associate, 大学院・自然科学研究科, 助手 (30294440)
SAKAGUCHI Hide Japan Marine Science & Technology Center, Group Head, 固体地球統合フロンティア研究システム, グループリーダ (10235145)
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| Project Period (FY) |
2002 – 2004
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| Keywords | Shear band / PIV / Plane strain compression / Meshless method / Toyoura sand / Image processing / Finite strain / Localization |
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| Research Abstract |
During a period of research project, an experimental device and the measurement system of localized deformation within saturated sand specimen during shear are constructed based on the particle image velocimetry(PIV) and the image processing device. Lateral image of the plane strain compression experiment under undrained condition using saturated Toyoura sand specimen is recorded by the high-speed video and the planar soil deformation is analyzed through the movement of a fine mesh of soil test patches on the image texture. These measurements are converted to the strain and the vortex distribution appeared in the lateral plane of specimen during the shear. After reviewing the underlying strategy of the PIV, a special focus is placed on the evolution of localized strain and vortex pattern. The mesh-free analysis program for solving soil-water coupled problem is also developed within the framework of finite strain to capture the localized profile of deformation of the specimen.
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Research Products
(13 results)
