2020 Fiscal Year Final Research Report
Strength evaluation on finger joint adhesive bonding for CFRP laminates.
| Project/Area Number |
18K04571
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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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| Review Section |
Basic Section 24010:Aerospace engineering-related
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| Research Institution | Meiji University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 複合材料 / 接着接合 |
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| Outline of Final Research Achievements |
Tensile tests were carried out to investigate the mechanical properties of finger joint strength for CFRP laminates structStudy ures. Observations during the strength tests, strength evaluations, and structural analysis (FEA) were also conducted. Manufactured specimens have parameters which are the splicing pitch and splicing depth as the finger joint parameters. The T series specimen was provided the grooves in which were the perpendicular to the applied load direction. The L series specimen was provided the grooves in which were the applied load direction. It was revealed that the adhesive bonding strength of finger joint for the CFRP laminates affects the splicing grooves direction, the splicing depth, and the splicing pitch. The L series specimens were improved the strength about three times of the normal shear bonded joint strength. It was confirmed that finger joint (L series) was an effective structural bonding method for high loaded CFRP laminates joint area.
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| Free Research Field |
複合材料構造設計
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| Academic Significance and Societal Importance of the Research Achievements |
複合材積層板を接合する手法として機械的及び接着接合があるが，接着接合強度の向上は，接着剤及び界面強度向上が主であり，しかも層間強度以上の強度は望めない．また，実際の設計では，確実な接合を保証する方法がなく，重量や疲労強度に有利といわれる接着接合部分には，機械的接合を併用しているのが現状である．しかし，本研究の結果では，接合方向と組継パラメータ条件を設定すれば，これまでの接合部分よりも約3倍もの接合強度を発現できることが確認され，これまで接着接合を用いることのできなかった部位にも接着接合が適用できる可能性がある．本研究成果では，今後の複合材構造軽量設計に大きく貢献できる可能性を示すことができた．
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