2014 Fiscal Year Final Research Report
Elucidation of Various Phenomena Induced by High-Speed Penetration in Granular Materials
| Project/Area Number |
24560978
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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 |
Aerospace engineering
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 粒状物質 / 高速貫入 / 速度計測 / 軌道計測 / 粒子破砕 |
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| Outline of Final Research Achievements |
High-speed penetration experiments into sands were performed using a vertical powder gun and a penetration velocity of projectile was measured by Magnet-Coil method developed in this research. The behavior of projectile changed at transition speed, and it was found that the transition speed give a fairly good agreement with the elastic wave speed.
In our high-speed penetration experiments, it was found that the penetrating projectile meandered. In order to measure the trajectory accurately, free fall experiments were performed and the output signal of Magnet-Coil method was formulated using distance from coil center and projectile inclination as parameter. This information is very valuable to establish the method of identification for location and attitude of projectile.
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| Free Research Field |
衝撃工学
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