| Project/Area Number |
14550075
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
TANAKA Koichi Nagoya Institute of Technology, Graduate school of Engineering, Professor, 工学研究科, 教授 (70024362)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIDA Masahiro Nagoya Institute of Technology, Graduate school of Engineering, Associate Professor, 工学研究科, 助教授 (60282828)
IDO Yasushi Nagoya Institute of Technology, Graduate school of Engineering, Associate Professor, 工学研究科, 助教授 (40221775)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | high-speed impact / Elastic / plastic deformation / Impact-induced fracture / Shock waves / Stress waves / Particulate aggregation / Numerical simulation / Experimental dynamics |
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| Research Abstract |
In this project, we obtained mainly the following two results.
(1) Impact phenomena of rotating aluminum alloy circular disks.
Aluminum alloy circular disks that are rotated by an electric motor and accelerated by a spring mechanism were impacted on a solid target. The rotational and translational motions of disks were analyzed using a high-speed video camera. Simultaneously, a cylindrical aluminum alloy target with strain gauges on its surface was used to measure impact-induced strains and stresses. Also, shock code AUTODYN-2D was used for numerical simulations. In this way, particularly the effect of rotation on the coefficient of restitution and impact forces was investigated minutely and very interesting behavior was obtained. The present result is useful for various impact phenomena appearing in high-speed rotating machines
(2) Shock phenomena of particulate aggregation.
Spheres made of nylon were arranged two-dimensionally and three-dimensionally in a vessel to from a particulate aggregation. Then, a spherical steel projectile was impinged to the aggregation at various impact velocities and impact angles. The motion of these particles was analyzed using high-speed video cameras. Also, discrete element method (DEM) was applied to numerical simulations on the motion of particles and stress wave propagation. In this case, since articles make rotational motion together with translational motion, contact mechanism and coefficient of restitution between particles that are rotating are particularly important. Therefore, the result of the impact phenomena of rotating bodies mentioned above.
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