2023 Fiscal Year Final Research Report
Development of evaluation method of joint strength for cruciform unidirectional composites
| Project/Area Number |
21K03760
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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 18010:Mechanics of materials and materials-related
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| Research Institution | Kindai University |
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Principal Investigator |
Noda Junji 近畿大学, 生物理工学部, 准教授 (00398992)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 十字型試験片 / モードI型はく離 / モードIII型はく離 / 結合力要素 |
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| Outline of Final Research Achievements |
In this study, a joint strength evaluation method under multi-axial loading conditions was proposed to evaluate the reliability of crossbeam structures made of unidirectional composite materials, which are lightweight and high-strength materials. By applying bending and in-plane shear loads to a cruciform unidirectional crossbeam specimen, we established a novel test method that exhibits delamination behavior under bending load and in-plane two-dimensional shear delamination behavior at the joints.
The delamination behavior of crossbeam joints was elucidated by combining in-situ damage quantification and damage propagation simulation based on the finite element method using a cohesive element.
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| Free Research Field |
複合材料
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| Academic Significance and Societal Importance of the Research Achievements |
近年，トポロジー構造最適化した複雑なFRP桁構造物が3Dプリンタによって成形され自転車等に実装される例や人工衛星のラティス構造体の実用等，桁構造がCFRP構造物のより高比強度化に寄与している．FRP桁構造体は，身近な生活から宇宙空間までこれまでの概念を覆す注目される構造であり，未解明であった桁接合体はく離挙動の解明は，その解明手法は学術的意義が高く，その構造体の普及は社会的意義においても価値がある．
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