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2005 Fiscal Year Final Research Report Summary

Effects of Cyclic Fatigue on Fracture Behavior at Practical Loading rates in Carbon Composites

Research Project

Project/Area Number 15360356
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Composite materials/Physical properties
Research InstitutionTokyo Institute of Technology

Principal Investigator

TANABE Yasuhiro  Tokyo Institute of Technology, Materials and Structures Laboratory, Associate Professor, 応用セラミックス研究所, 助教授 (70163607)

Co-Investigator(Kenkyū-buntansha) YASUDA Eiichi  Tokyo Institute of Technology, Materials and Structures Laboratory, Professor, 応用セラミックス研究所, 教授 (70016830)
AKATSU Takashi  Tokyo Institute of Technology, Materials and Structures Laboratory, Assistant Professor, 応用セラミックス研究所, 講師 (40231807)
Project Period (FY) 2003 – 2005
KeywordsCarbon Composites / Strain Rates / Loading Rates / Fatigue
Research Abstract

In Carbon fiber reinforced carbon composites (C/C composites), fatigue conditions for bending and shear modes are much different each other. In bending, fatigues are accelerated with increasing stress ratios, but in shear they are accelerated with decreasing the ratios. In some composites, fatigues are accelerated in water or in high humidity. In carbon fiber reinforced epoxy resin composites (CFRP), fracture behavior can be controlled by changing hardening agent even at high loading rates. However, the stress and/or strain detected by gauges are not much different among the different CFRPs with different hardening agents. Therefore, the changes in the behavior seem to be originated from localized deformation. The effects of interfaces on the reflection of stress waves and on the initiation of damages are evaluated by using in situ high-speed photographs : The interfaces act as a damage sources in certain cases. In C/C composites, fatigue surely affects the behavior of crack behaviors : crack-path changes before and after fatigue tests. The changes in fracture energy are small at the loading rates of Charpy tests by changing the matrix resins, but interface adhesion affects the absorption in all loading rates.
The above experimental results indicate that controlling of interfacial bonding is important in an off-axial loading of fatigue, and that the bonding should be controlled depending on the loading rates. The material parameters to be controlled are demonstrated through the experiments.

  • Research Products

    (12 results)

All 2005 2004 2003

All Journal Article (11 results) Book (1 results)

  • [Journal Article] 高速度カメラを用いた繊維強化複合材料の衝撃破壊挙動の観察2005

    • Author(s)
      角大詩, 斎藤記一 他
    • Journal Title

      高速度撮影2005

      Pages: 1-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 衝撃によるセラミック材料の破損挙動2005

    • Author(s)
      田邊靖博 他
    • Journal Title

      日本セラミックス協会学術論文誌 113

      Pages: 198-209

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Observation of Impact Fracture Behavior of Fiber-Reinforced Composites with High-speed Camera2005

    • Author(s)
      D.Sumi, N.Saito, A.Ueda, E.Yasuda, Y.Tanabe
    • Journal Title

      HSPPJ 2005

      Pages: 1-3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Damage Behavior of Ceramic Materials by Impact2005

    • Author(s)
      Y.Tanabe, E.Yasuda
    • Journal Title

      J.Ceramic Society of Japan 113

      Pages: 198-209

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Fatigue of C/C Composites in Bending and in Shear Modes2004

    • Author(s)
      Y.Tanabe, T.Yoshimura et al.
    • Journal Title

      Carban 42

      Pages: 1665-1670

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Fatigue of C/C Composites in Bending and in Shear Modes2004

    • Author(s)
      Y.Tanabe, T.Yoshimura, T.Watanabe, T.Hiraoka, E.Yasuda
    • Journal Title

      Carbon 42

      Pages: 1665-1670

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] In-Situ Speckle Observation on Tyrano/BMAS Composites in Shear Strength Measurements2003

    • Author(s)
      Y.Tanabe et al.
    • Journal Title

      Composites B 34

      Pages: 399-403

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Characteristics of Materials on Fracture Behavior and Modeling of It using Graphite-related Materials with a High-velocity Steel Sphere2003

    • Author(s)
      K.Fujii et al.
    • Journal Title

      Int'1 J. Impact Engng 28

      Pages: 985-999

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Stress and Strain Measurements in Carbon-related Materials Impacted by a High Velocity Steel Sphere2003

    • Author(s)
      Y.Tanabe, M.Aoki
    • Journal Title

      Int'1 J. Impact Engng 28

      Pages: 1665-1670

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Stress and Strain Measurements in Carbon-related Materials Impacted by a High Velocity Steel Sphere2003

    • Author(s)
      Y.Tanabe, M.Aoki
    • Journal Title

      Int'l J.Impact Engng. 28

      Pages: 1045-1059

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Characteristics of Materials on Fracture Behavior and Modeling of It using Grapite-related Materials with a High-velocity Steel Sphere2003

    • Author(s)
      K.Fujii, E.Yasuda, T.Akatsu, Y.Tanabe
    • Journal Title

      Int'l J.Impact Engng. 28

      Pages: 985-999

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 航空宇宙工学便覧第3版2005

    • Author(s)
      田邊靖博(分担)
    • Publisher
      丸善
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2007-12-13  

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