2023 Fiscal Year Final Research Report
Development of high speed nail joint method to be recyclable
| Project/Area Number |
21H01216
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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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| Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | マルチマテリアル / 機械的接合 / 高速打鋲 / 接合強度 / 疲労強度 |
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| Outline of Final Research Achievements |
In this study, we have investigated the mechanical behavior of plastic deformation and the joining mechanism during the high-speed nailing, the effects of the drive speed of nail, kinetic energy and the tip shape of the nail on the joining strength. As a result, although we were unable to fully elucidate the mechanical behavior of plastic deformation and the joining mechanism using FEM analysis, we were able to understand the deformation behavior experimentally, reveal the optimal nail tip shape, and propose a method to improve joining strength.
At next, we have conducted the research with the aim of proposing the high speed nailing method which can secure high joining strength by accelerating the nail rotation speed during the high speed nailing. But we were unable to enough achieve the aim. However, we have confirmed that the fatigue strength can be improved by applying torque to the nailing joint.
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| Free Research Field |
材料力学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，マルチマテリアル接合を目的とした高速打鋲接合に関する課題であり，接合強度と運動エネルギーの関係や，鋲先端形状と接合強度の関係を明らかにした．また高速打鋲時の被接合部材の変形が，接合強度にどのように影響をもたらすかも明らかにしており，本研究の成果は今後の高速打鋲接合研究の基盤をなす結果であると考えている．また本研究の成果によって，高速打鋲接合における接合強度を，以前の我々の研究における接合強度と比較して1.5倍程度まで向上できており，しかも安定した強度を得ることができている．その結果から，工業的価値も高く，今後の研究において社会的な普及も期待できると考えている．
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