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Development of fiber-reinforcement-based crack arrester for composite bonded joints

Research Project

Project/Area Number 17H03475
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Aerospace engineering
Research InstitutionThe University of Tokyo

Principal Investigator

Minakuchi Shu  東京大学, 大学院工学系研究科(工学部), 准教授 (70512359)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2017: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords複合材料 / 接着接合 / クラックアレスタ / 亀裂抑制 / 応力集中 / 剥離 / 損傷許容性 / 樹脂亀裂 / 伸張成形 / 接着 / 亀裂 / 亀裂進展抑制 / 航空宇宙工学 / 接着構造
Outline of Final Research Achievements

This study developed a fiber-reinforcement-based crack arrester technology to realize boltless composite structures. Through crack propagation tests and finite element analysis, the optimal arrester configuration for maximizing the crack stopping effect was investigated, and it was demonstrated that fatigue disbond and T-joint failure could be suppressed. In addition, ply curving termination (PCT) was devised to suppress the stress concentration at ply edges, and its effectiveness was confirmed by basic experimental verification.

Academic Significance and Societal Importance of the Research Achievements

従来の航空機複合材構造は、硬化成形した部材を接合し構造に組み立てる際に剥離防止のためのボルト締結が大量に用いられているため、複合材料の優れた力学的特性・軽量性が十分には生かされておらず、また製造コストが従来金属構造に比べて非常に高い。本研究は接着接合の信頼性を向上させることを目的とした試みであり、ボルト締結部を大幅に削減する「ボルトレス化」により軽量化と低コスト化を同時に実現するものである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (16 results)

All 2020 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (15 results) (of which Int'l Joint Research: 11 results,  Invited: 1 results)

  • [Journal Article] Effect of interlocking fiber configuration on mode-I disbond arresting in composite bonded joints2020

    • Author(s)
      S. Hisada, S. Minakuchi, N. Takeda
    • Journal Title

      SAMPE JOURNAL

      Volume: 未定

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Ply Curving Termination to Suppress Delamination in Composite Ply Drop-Off2019

    • Author(s)
      Minakuchi S., Takeda N.
    • Organizer
      The International Committee on Aeronautical Fatigue and Structural Integrity (ICAF) 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ply curving termination: suppressing delamination in tapered composites2019

    • Author(s)
      Shu Minakuchi, Nobuo Takeda
    • Organizer
      22nd International Conference on Composite Materials 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Process-induced failure of deltoid in composite T-joint: fiber-optic based monitoring and numerical simulation2019

    • Author(s)
      Shinsaku Hisada, Shu Minakuchi, Nobuo Takeda
    • Organizer
      22nd International Conference on Composite Materials 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ply curving termination:suppressing delamination in composite ply drop-off2019

    • Author(s)
      Shu Minakuchi, Nobuo Takeda
    • Organizer
      1st Russia-Japan Joint Workshop on Composite Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ply Curving Terminationを用いた複合材剥離抑制2019

    • Author(s)
      水口周,武田展雄
    • Organizer
      第61回構造強度に関する講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Ply Curving Terminationによるトランスバースクラックと端面剥離の抑制2019

    • Author(s)
      水口周,武田展雄
    • Organizer
      第 11回 日本複合材料会議
    • Related Report
      2019 Annual Research Report
  • [Presentation] CRACK PROPAGATION SUPPRESSION IN COMPOSITE T-JOINT USING FIBER-REINFORCEMENT-BASED CRACK ARRESTER2018

    • Author(s)
      Shinsaku Hisada, Shu Minakuchi and Nobuo Takeda
    • Organizer
      18th European Conference on Composite Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 繊維強化型クラックアレスタを用いた複合材T-jointの損傷許容性向上2018

    • Author(s)
      久田深作,水口周,武田展雄
    • Organizer
      第60回構造強度に関する講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Enhancing Damage Tolerance of Composite T-joint Using Fiber-Reinforcement-Based Crack Arrester2018

    • Author(s)
      Shinsaku Hisada, Shu Minakuchi, Nobuo Takeda
    • Organizer
      American Society for Composites 33rd Technical Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 繊維強化型クラックアレスタを用いた複合材T-jointの亀裂進展抑制2018

    • Author(s)
      久田深作, 水口周, 武田展雄
    • Organizer
      第9回日本複合材料会議
    • Related Report
      2017 Annual Research Report
  • [Presentation] Crack Propagation Suppression in Composite T-joint using Fiber-reinforcement-based Crack Arrester2018

    • Author(s)
      Shinsaku Hisada, Shu Minakuchi and Nobuo Takeda
    • Organizer
      18 European Conference on Composite Materials -ECCM 18
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Arresting Fatigue Crack in Composite Bonded Joint using Fiber-Reinforcement Design Feature2017

    • Author(s)
      Shu Minakuchi and Nobuo Takeda
    • Organizer
      International Committee on Aeronautical Fatigue and Structural Integrity ICAF2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ARRESTING CRACK IN COMPOSITE BONDED JOINT UNDER FATIGUE USING FIBER-REINFORCEMENT-BASED FEATURE2017

    • Author(s)
      Shu Minakuchi and Nobuo Takeda
    • Organizer
      SAMPE Seattle 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ARRESTING FATIGUE CRACK IN COMPOSITE BONDED JOINT USING INTERLOCKED FIBER FEATURE2017

    • Author(s)
      Shu Minakuchi and Nobuo Takeda
    • Organizer
      21st International Conference on Composite Materials
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] STOPPING FATIGUE CRACK IN COMPOSITE BONDED JOINT USING INTERLOCKED FIBER FEATURE2017

    • Author(s)
      Shu Minakuchi and Nobuo Takeda
    • Organizer
      15th European-Japanese Meeting on Composite Materials
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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