Bifurcation processes to shear-localization and unstable behavior of rock
| Project/Area Number |
25610150
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geology
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
TAKAHASHI Miki 独立行政法人産業技術総合研究所, 活断層・火山研究部門, 研究員 (40470033)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 歪集中 / 平面歪試験 / 回転せん断試験 / 摩擦構成則 / 分岐現象 / 岩塩 / せん断変形 / 国際情報交換 / オランダ / ユトレヒト大学 / 平面歪試験機 / マイロナイト組織 / 歪軟化 / 国際研究者交流 / オランダ、フランス |
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| Outline of Final Research Achievements |
Here we assumed that processes to unstable behavior of rock, which induces huge earthquake, will be began from selection and localization of shear in rock system. Based on this hypothesis a goal of this study is to denote possible measureable phenomena we will have in nature.
We planned and carried out two types of experiments; one is plane shear test on halite board, another is rotary shear test for halite powder. For the plane shear test, we started to construct new, observation-available machine for deformation on the halite board. For the rotary shear test, we determined deformation parameters of the halite-muscovite mixture using velocity step change tests. Those deformation parameters showed history dependences, which might be caused both by what matured structure developed in halite specimen and by localization.
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Report
(3 results)
Research Products
(12 results)
