| Project/Area Number |
25420019
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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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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Yamaguchi University |
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Principal Investigator |
Koichi Goda 山口大学, 理工学研究科, 教授 (10153743)
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| Research Collaborator |
KIM Hyun-Bum 山口大学, 大学院理工学研究科, 博士後期課程
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | グリーンコンポジット / 天然繊維 / 撚糸 / ポリプロピレン / マレイン酸変性樹脂 / PVA / 押出し成形 / 強度 |
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| Outline of Final Research Achievements |
The purpose of this study is to realize green composites with high reliability and mechanical properties. First, reliability mechanism in elastic modulus was studied experimentally and theoretically, using a green composite strand reinforced by natural fiber spun yarn. Results based on first-order second-moment method (FOSM), one of the representative reliability engineering models, showed that the both factors, (i) fiber orientation angle in a spun yarn and (ii) the fiber volume fraction, were closely related with the statistical variation of elastic modulus. Next, a green composite strand producing equipment which can control fiber orientation angles in a spun yarn, was newly developed. Results show, although elastic modulus of a spun yarn without resin is usually reduced with increase in fiber orientation angle, that of the resultant composite strand was enhanced conversely through resin impregnation and stronger entanglement between fibers.
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