2021 Fiscal Year Final Research Report
Material and Geometrical Improvement on Structural Rigidity for Inflatable structures by using Micro-Capsule
| Project/Area Number |
18K04554
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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 | Kagawa University (2020-2021)
Muroran Institute of Technology (2018-2019) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
千葉 誠 旭川工業高等専門学校, 物質化学工学科, 准教授 (80390384)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Keywords | 宇宙インフレータブル構造 / マイクロカプセル / 発砲硬化 / 構造硬化 / 発砲ウレタン |
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| Outline of Final Research Achievements |
The space inflatable structure is a structure that is expected to be applied to large space structures. This is because it is lightweight due to an airtight structure made of a membrane materials, and it does not require a mechanical actuator because it can be deployed only by filling it with gas. However, since it has the same structure as a so-called balloon, it will not function if the internal pressure cannot be maintained.
In order to solve this problem, this study focused on rigidization after the deployment of the inflatable structure. However, instead of rigidizing only the membrane material, we considered creating a foamed cured layer in orbit by encapsulating the urethane foam material in the microcapsules and destroying the microcapsules after deployment. Therefore, the research focused not only on the material rigidization but also on the improvement of the geometrical structural rigidity and strength by creating the the hard foam layer.
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| Free Research Field |
宇宙構造物工学
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| Academic Significance and Societal Importance of the Research Achievements |
紫外線などを用いた膜材の硬化手法については、先行研究として提案されている。しかし、膜材が硬化したとしても厚さは同じなので、構造剛性に対するメリットはそこまで得られていなかった。
一方、発砲硬化層を生成して硬化できた場合には、膜厚の数～数十倍の厚さの構造を打ち上げ後の軌道上で生成できることになる。曲げ変形を例にとれば、構造物の厚さの3乗に比例して剛性が変化するので、発砲硬化層による硬化手法は幾何学的にも性能を向上させることができる点でメリットがある。また剛性が向上すれば変形しにくくなるため、構造物の大型化が達成しやすくなる。
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