| Project/Area Number |
25420084
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Yokohama National University |
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Principal Investigator |
Ozaki Shingo 横浜国立大学, 工学(系)研究科(研究院), 准教授 (20408727)
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| Co-Investigator(Kenkyū-buntansha) |
Yamanashi Yuki 横浜国立大学, 工学研究院, 准教授 (70467059)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 設計工学 / トライボロジー / テラメカニクス / 計算力学 / 月面機器 / 計算工学 / 粒状体 / 個別要素法 / せん断試験 / 低重力 / 摩擦 |
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| Outline of Final Research Achievements |
The rational treatment of the frictional interaction between lunar soil and a mechanical system is one of the several technical issues encountered during lunar operations. Therefore, it has become essential to come up with a method to evaluate frictional interaction on lunar surface environment, which is characterized by soft ground, low gravity, and high vacuum. In this study, first a test apparatus was developed to perform the rotational shear test of granular media. Then, a magnetic field device was combined with the friction test apparatus to investigate the effect of gravity on frictional interaction. Using the developed test apparatus, the test was performed under a pseudo low-gravity condition. This enabled the investigation of variations in frictional torque between the granular media and various solid surfaces, with respect to the time elapsed, under the pseudo low-gravity conditions.
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