| Project/Area Number |
14350053
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Kanazawa University |
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Principal Investigator |
YAMAZAKI Koetsu Kanazawa University, Graduate School of Natural Science and Technology, Professor, 自然科学研究科, 教授 (70110608)
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| Co-Investigator(Kenkyū-buntansha) |
ODA Juhachi Kanazawa University, Graduate School of natural Science and Technology, Professor, 自然科学研究科, 教授 (30019749)
SAKAMOTO Jiro Kanazawa University, Graduate School of natural Science and Technology, Associate Professor, 自然科学研究科, 助教授 (20205769)
KITAYAMA Satoshi Kanazawa University, Graduate School of natural Science and Technology, Assistant, 自然科学研究科, 助手 (90339698)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2004: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2003: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2002: ¥6,900,000 (Direct Cost: ¥6,900,000)
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| Keywords | Crushing Energy Absorption / Light Weight Cell Structure / Crack Initiation / Crack Growth and Penetration / Honeycomb Cell Structure / Structural Optimization |
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| Research Abstract |
This research has been done to develop honeycomb cell structures which have high absorbing capability of impact energy by crushing and fracturing of cells. The obtained results are summarized as follows :
(1)Breaking and penetration prediction of projectile : When a cone projectile with sharp edge penetrates a thin aluminum film, it has been found that cracking and penetrating phenomena can be predicted by the criterion of limit equivalent breaking strain in the penetration simulation. The phenomena have also been confirmed by the experiments.
(2)Crushing phenomena prediction : The energy absorbing phenomena of honeycomb cell structures have been simulated by the explicit dynamic finite element method, and the simulated results of absorbing energy as well as folding phenomena have been compared with that of crushing experiment of aluminum cell structures.
(3)Absorbing capability of honeycomb cell structure with sheet : Honeycomb cell structures with thin sheets has been fabricated and tested by the experiments. It has been found that there is much effect for energy absorption when the crushing of honeycomb cell structures accompany the sheet fracture by the projectile. The energy absorbing effects have also been predicted by the crushing and braking simulation of FEM.
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