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Development of fiber reinforced composites to optimize high speed compression molding and fatigue strength

Research Project

Project/Area Number 17K14821
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Composite materials/Surface and interface engineering
Research InstitutionNational Institute of Maritime, Port and Aviation Technology (2019-2020)
The University of Tokyo (2017-2018)

Principal Investigator

Matsuo Tsuyoshi  国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 上席研究員 (80589490)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords複合材料 / 疲労強度 / 熱可塑性CFRP / 温度依存性 / せん断応力 / 疲労特性 / 破断ひずみ / 層間せん断特性 / 画像相関法 / 面外特性 / 炭素繊維強化プラスチック / 面外引張特性 / デジタルイメージコリレーション / ひずみ分布計測 / 材料工学 / 構造用複合材料
Outline of Final Research Achievements

In this research, the fatigue characteristics of two types of randomly oriented CFRP, mat-type and chopped tape-type, were investigated. In addition, the influence of matrix resin on their fatigue behaviors were considered about the temperature dependence of their fatigue strengths. As a result, it was estimated that the fatigue properties of matrix resin on interface or interlaminar between carbon fibers influenced the fracture mode of randomly oriented CFRP and the temperature dependence of fatigue behaviors of CFRP.

Academic Significance and Societal Importance of the Research Achievements

軽量かつ生産性に優れる,ランダム配向型炭素繊維強化プラスチックス(CFRP)は,航空機・自動車・船舶などの構造体に金属の代替材料として適用できれば,運用時のGHG削減や省エネにつながる.一方,本材料の疲労特性を,温度を変えて検証した研究例は過去になく,構造物の信頼性を評価する上で,重要な検証結果を得た.加えて,その疲労特性が,CFRPを構成する特にマトリックスの疲労強度の温度依存性に大きく影響を受けることを示せたため,構造物の疲労強度設計における信頼性を担保するための主要な指針となり得る.本研究は,軽量素材の普及拡大に大きく貢献し,環境負荷の低減を加速させる基盤技術となる期待が持てる.

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (2 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] Experimental method and evaluation for interlaminar shear properties of randomly oriented strand thermoplastic composites based on modified double-notch specimen and two dimensional digital image correlation2020

    • Author(s)
      Murakami Takashi、Matsuo Tsuyoshi、Sumiyama Takuya
    • Journal Title

      Journal of Composite Materials

      Volume: 55 Issue: 10 Pages: 1315-1330

    • DOI

      10.1177/0021998320967719

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] ランダム配向CFRPの疲労強度に及ぼす樹脂特性の影響に関する考察2021

    • Author(s)
      松尾 剛
    • Organizer
      第12回日本複合材料会議
    • Related Report
      2020 Annual Research Report

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Published: 2017-04-28   Modified: 2022-01-27  

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