2021 Fiscal Year Final Research Report
Creation of a flexible impact absorption mechanism using solid-liquid variable cell structure fluid
| Project/Area Number |
20K14615
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 18010:Mechanics of materials and materials-related
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Keywords | セル構造体 / 衝撃吸収 |
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| Outline of Final Research Achievements |
The purpose of this study is to create a material that is normally flexible but exhibits high impact absorption characteristics when an impact load is applied. We attempted to fabricate a "cell structure" by using a "solid-liquid variable fluid" that is a fluid but has the property of solidifying under impact load. At this time, the stress wave propagation characteristics and impact absorption characteristics were evaluated by changing the composition of the solid-liquid variable fluid. As a result of the examination, it was confirmed that the solid-liquid variable fluid created in this study has a velocity dependence in which the impact absorption characteristics change significantly in a certain velocity range.
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| Free Research Field |
Impact Engineering
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| Academic Significance and Societal Importance of the Research Achievements |
本研究課題では，固液可変流体を用いたセル構造流体の作製について検討した．この際，固液可変流体の波動伝播特性，特にその速度依存性に関する知見が得られ，普段は柔軟でありながら，衝撃荷重が加わった際には高い衝撃吸収特性を有する「負荷荷重に対してフレキシブルな衝撃吸収メカニズム」を見出す可能性が示された．この衝撃吸収メカニズムは，従来とは異なる新しい衝撃吸収材料の創成へ応用できると研究代表者は期待している．
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