| 研究課題/領域番号 |
20K15038
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| 研究機関 | 東京大学 |
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研究代表者 |
ワン イー 東京大学, 大学院工学系研究科(工学部), 助教 (90816844)
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| 研究期間 (年度) |
2020-04-01 – 2023-03-31
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| キーワード | high-performance CFRP / fabrication process / mechanical property / internal geometry |
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| 研究実績の概要 |
In the last year, research achievements on two aspects have been accomplished on the HDFC.
The first one is the research of internal geometry evaluation under different stress conditions. A set of interrupt-micro-X-ray CT aided tensile tests were carried out. The micro-voids and micro-crack growing was successfully observed using the high-resolution micro-X-ray CT machine and further visualization and quantification of these micro-voids and micro-crack are undergoing.
The second one is the molding of HDFC with the consideration of internal geometries. Monte-Carlo aided analytical model was established to predict not only the average value but also the variation of mechanical properties of HDFC with different fiber lengths. The results show good agreement with the experimental data.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The research is carried out in three main steps aiming at satisfactory elucidation of the evaluation of HDFC on the fabrication conditions, the internal geometries, the mechanical properties, and their relationships.
The relation between the complex internal geometry generated from the fabricating processes and mechanical behaviors (both the average and variation values) is evaluated by the combination of a state-of-art fabricating flow simulation model, micro-X-ray CT observation methods, and Monte-Carlo aided analytical model. Preliminary attempts have been performed on these three steps, however, the reliable and repeatable integration of all the steps for providing a compressive HDFC evaluation methodology is still undergoing.
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| 今後の研究の推進方策 |
This research aims at the comprehensive study of fabrication conditions and mechanical performances of HDFC, providing feasible and efficient methodologies for adequate and precise evaluation of HDFC after fabricating processes.
In the final year of this project, the relationship between the fabrication conditions, the internal geometries, and the mechanical properties will be evaluated and modelized in detail. The important role of the micro-voids and micro-crack observed by micro-X-ray CT will be analyzed. A reliable and repeatable methodology will be given to help the researchers and engineers to conduct compressive evaluation, prediction, and design of HDFC.
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| 次年度使用額が生じた理由 |
The planned international conference was canceled last year due to the pandemic situation. The international conference and further international collaboration with researchers in Belgium and UK are scheduled and will be carried out during this financial year.
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