2023 Fiscal Year Final Research Report
Investigation on the deformation and strength characteristics of structural members made of bio-inspired helicoidally laminated CFRPs
| Project/Area Number |
21H01411
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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 22020:Structure engineering and earthquake engineering-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 構造工学 / 土木材料 / 複合材料 / FRP / 生体模倣 / らせん積層 |
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| Outline of Final Research Achievements |
The objective of this study was to clarify the behaviors and characteristics of helicoidally laminated CFRP members and to investigate the pattern and mechanism of damage and fracture from the viewpoint of improving the brittle behavior and acquiring tough characteristics of the bio-inspired members. In previous studies, the scale corresponding to “a part of a structural member” was considered. In this study, the scale corresponding to “a structural member” was investigated. Bending experiments were conducted on helicoidally laminated CFRP box beams, which correspond to the exoskeleton of a living body, to achieve the above-mentioned objective. Additionally, finite element analysis was conducted to investigate the deformation mechanism of helicoidally laminated CFRP rectangular plates, which had been studied as “a part of a structural member” in the past, with a model reflecting the configuration of the helicoidally laminated CFRP.
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| Free Research Field |
構造工学 土木材料
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| Academic Significance and Societal Importance of the Research Achievements |
らせん積層を有し粘り強い生体の外骨格構造に着想を得て，人工物であるCFRPを用いて生体の外骨格に相当する箱形断面梁をらせん積層で製作した．曲げ挙動において，脆性挙動の緩和と粘り強い特性の獲得が可能なことを示した．また，その破壊形態は面外への隆起とジグザク状のひび割れを呈する非常に特徴的な形態を示すことを三次元デジタル画像相関法も用いて明らかにした．本研究ではらせん積層CFRPの部材レベルでの曲げ特性の基礎的確認を行ったことになり，今後の材料・構造の研究開発の可能性を示した．
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