| 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 |
This research aims at the comprehensive study of fabrication conditions and mechanical performances of the high-performance discontinuous fiber composites (HDFC). In the last year, research achievements on two main aspects have been accomplished on the HDFC.
The first one is the research of fiber flow during compressive fabricating processes. A state-of-art LS-DYNA based multi-scale model was established to simulate the real fiber morphology in the HDFC. The fiber orientation distribution after compression molding can be predicted. The comparison with the fiber orientation distribution observed by X-ray CT exhibits a satisfactory result.
The second one is the evaluation of the effect of internal geometries on mechanical properties. The effect of fiber/tow sizes and molding conditions on the mechanical properties was verified. Two internal-geometry-considered modeling approaches were applied to simulate the mechanical properties of HDFC. The results show good agreements with experiments.
The research achievements providing feasible and efficient methods for evaluation of the internal geometries and mechanical properties of HDFC after the fabricating processes. Whereas, the detailed relationship between fabricating processes, internal geometries and mechanical properties of HDFC still remain unrevealed.
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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 on 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.
A state-of-art LS-DYNA based multi-scale model was established in the first step for the characterization of the compressive fabricating processes.
X-ray CT based observation and novel image processing method is under development in the second step for the internal geometry visualization and quantification.
Preliminary attempts have been performed experimentally and simulationally on the third step for integrating the fabrication conditions, the internal geometries, and the mechanical properties.
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| 今後の研究の推進方策 |
This research aiming 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 further step, more efforts will be paid on the integration of the fabrication conditions, the internal geometries, and the mechanical properties to reveal their relationships.
The comparison between the molding flow model established in the first step and the X-ray CT visualization and quantification in the second step will be carried out to enhance the accuracy of the simulation process.
Moreover, the molding flow model will be modified and transferred to further finite element models to conduct the real structure considered simulation.
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| 次年度使用額が生じた理由 |
The amount to be used next fiscal year is incurred undesignedly, and is planed to be used for the journal paper submission cost.
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