2023 Fiscal Year Final Research Report
Design of Pseudo-ductility in Fibre Reinforced Composites by Controlling Interlaminar Properties
| Project/Area Number |
21K04482
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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 | Osaka Metropolitan University (2022-2023)
Osaka City University (2021) |
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Principal Investigator |
Nakatani Hayato 大阪公立大学, 大学院工学研究科, 准教授 (90584417)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | CFRP / 擬似的延性 / フラグメンテーション / 層間破壊靭性 / メッシュ構造 / アコースティックエミッション / 応力集中部 / 耐疲労性 |
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| Outline of Final Research Achievements |
An original technique for developing pseudo-ductile behaviour in CFRP laminates, that are known to exhibit brittle fracture, has been experimentally established based on accumulation of microscopic damage throughout the material which is accomplished by selective interlaminar toughening by introducing mesh interlayers to suppress large-scale interlaminar delamination. It has been shown that the microscopic damage accumulation behaviour achieved by the interlaminar property control using the mesh interlayers can also suppress the tensile strength reduction of less than 10% and significantly improved fatigue life of angle-plied CFRP laminates with stress concentrations.
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| Free Research Field |
複合材料工学
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| Academic Significance and Societal Importance of the Research Achievements |
ほぼ前触れがない脆性破壊を示すCFRP積層板において，微視的損傷の蓄積により擬似的な延性を発現させるこの独自技術の構築は，層間メッシュ層の導入により従来とは異なる特性の発現が可能となるCFRP積層板の新たな材料デザイン手法の展開につながる画期的なものである．損傷を許容したCFRP積層板の強度・破壊メカニズムを理解するという点で学術的に取り組む意義は深く，同時に今後のCFRPの適用拡大に大きく貢献できる技術として社会的意義も大きい．
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