| Project/Area Number |
06452345
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Aerospace engineering
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
KUROKAWA Tomoaki Kyoto Univ., Graduate School of Engng.Assc.Prof., 工学研究科, 助教授 (80127076)
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| Co-Investigator(Kenkyū-buntansha) |
TODA Susumu National Aerospace Laboratory Structural Mech.Div.Director, 部長
NOJIMA Taketoshi Kyoto Univ., Graduate School of Engng.Instructor, 工学研究科, 助手 (40026258)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1994: ¥6,900,000 (Direct Cost: ¥6,900,000)
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| Keywords | Space Debris / Space Structure / Whipple Shield / Impact / High Velocity Fracture / スペース・デブリ / ホィップル・バンパー |
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| Research Abstract |
Comparatively low velocity impact tests in the velocity range of 1-2s.7Km/s have been carried out using one-stage powder gun and two-stage He-gas gun, to investigate the protection performance of bumper structure against space debris. The Whipple shielding effect was estimated by measuring the volume and the maximum penetration depth of the crater generated by debris cloud in the thick aluminum plate settled 100mm behind the bumper plate. The results obtained are as follows :
1.The maximum depth increases monotonically with the impact velocity. No optimum (the most dangerous) velocity has found in the above mentioned range.
2.The maximum depth is more shollow than the predicted depth generated assuming that non-destroyed projectile and bumper plug are combined as an onepiece ptojectile and collide against main wall.
3.The crater volume decreases with the mass of the bumper plate per unit area. But the maximum crater depth has not direct correlation with it. Therefore there exists the optimum bumper material of light mass. Out of bumper materials examined in this experiment, Glare (Fiber Metal Laminates of glass/epoxy and aluminum plate) has showed the best performance.
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