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Observation on Failure Process of Fiber-Reinforced-Composites in High Temperature Fatigue

Research Project

Project/Area Number 04452114
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 機械材料工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

OHTANI Ryuichi  Kyoto University, Faculty of Engineering, Professor, 工学部, 教授 (50025946)

Co-Investigator(Kenkyū-buntansha) TADA Naoya  Kyoto University, Faculty of Engineering, Research Associate, 工学部, 助手 (70243053)
KITAMURA Takayuki  Kyoto University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20169882)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1993: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1992: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsComposite / High temperature Strength / Creep Fatigue / Metal Matrix Composite / Fiber Reinforced Polymer / Crack / Fracture Mechanics / Fiber Bridging / 破壊じん性
Research Abstract

Delamination behavior of carbon fiber reinforced polymer at high temperatures was investigated in order to elucidate the effect of matrix creep using double cantilever beam specimens of CF/PEEK and CF/PMR-15 laminates. The propagation of delamination crack was observed by means of optical microscope and it revealed that the creep accelerated the propagation rate of CF/PEEK in fatigue at 473K while the creep scarcely took place in the tests of CF/PMR-15 at 573K.The experimental results was successfully analyzed on the basis of linear fracture mechanics concept. The tests were also conducted under constant stress intensity factor range in order to examine the shielding effect of fiber bridging. The propagation rate was decelerated as the crack propagated because of the fiber bridging. The micro-morphology of bridging was observed by means of microscopes.
The fatigue tests of SiC-whisker reinforced aluminum alloy were carried out at 573K.The focus of this study was put on the observation on the failure life and the cracking morphology in high temperature fatigue. The fatigue life was shortened by creep deformation. Few cracks were observed during the fatigue and one of them, which initiated at the middle stage of life, brought about the failure. As the tensile strength and the creep life of the material at high temperatures was examined by a joint research project (Report on High Temperature Strength of SiC-whisker reinforced aluminum alloy, Society of Materials Science, Japan, 1993), the results obtained in this study were analyzed on the basis of the fundamental data.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] 大谷隆一: "応力休止によるCFRPの高温層間はく離伝ぱの遅延" 日本機械学会講演論文集. 920-78. 148-150 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 北村隆行: "一方向炭素繊維強化熱可塑性プラスチックスの高温疲労層間はく離き裂伝ぱ" 材料. 42. 59-64 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ryuichi Ohtani: "Mode I Delamination of Carbon Fiber Reinforced Thermoplastic Polymer under Static and Cyclic Creep at Elevated Temperatures" ASTM STP. 1172. 23-38 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takayuki Kitamura: "Effect of Frequency on Delamination Crack Growth in High Temperature Fatigue of Unidirectional CF/PEEK Composite" Proc.of the Ninth International Conference on Composite Materials. 267-274 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 大谷隆一: "耐熱性CFRP積層板の層間はく離高温破壊じん性" 日本機械学会論文集 A編. 59. 2234-2240 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 大谷隆一: "一方向強化AS4/PEEK積層板の高温疲労層間はく離き裂伝ぱに対する繊維架橋によるクラックシールディング効果 (発表予定)" 日本材料学会第23回FRPシンポジウム講演論文集. (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ryuichi Ohtani: "Delay of Delamination Crack Propagaiton in High Temperature Fatigue of CFRP Due to Zero Stress Hold" Proc.of the JSME Fall Annual Meeting. No.920-78, Vol.B. 148-150 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takayuki Kitamura: "Delamination Crack Growth of Unidirectional Carbon Fiber Reinforced Thermoplastic Polymer under High Temperature Fatigue" Journal of the Society of Materials Science, Japan. Vol.42, No.472. 59-64 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ryuichi Ohtani: "Mode I Delamination of Carbon Fiber Reinforced Thermoplastic Polymer under Static and Cyclic Creep at Elevated Temperatures" ASTM STP 1172, American Society for Testing and Materials. 23-28 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takayuki Kitamura: "Effect of Frequency on Delamination Crack Growth in High Temperature Fatigue of Unidirectional CF/PEEK Composite" Proc.of the Ninth International Conference on Composite Materials. 267-274 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ryuichi Ohtani: "Temperature Dependence of Delamination Fracturte Toughness of CF/PEEK and CF/PMR-15 Laminates" Transactions of Japan Society of Mechanical Engineers A. Vol.59, No.566. 2234-2240 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Ryuichi Ohtani: "Effect of Crack Shielding due to Fiber Bridging on Delamination Propagation in High Temperature Fatigue of AS4/PEEK Laminate" Proc.of the 23rd Symposium on Fiber Reinforced Polymer. III110-III114 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 大谷隆一: "応力休止によるCFRPの高温層間はく離伝ぱの遅延" 日本機械学会講演論文集. No.920-78. 148-150 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 北村隆行: "一方向炭素繊維強化熱可塑性プラスチックスの高温疲労層間はく離き裂伝ぱ" 材料. 42. 59-64 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Ryuichi Ohtani: "Mode I Delamination of Carbon Fiber Reinforced Thermoplastic Polymer under Static and Cyclic Creep at Elevated Temperatures" ASTM STP. 1172. 23-38 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Takayuki Kitamura: "Effect of Frequency on Delamination Crack Growth in High Temperature Fatigue of Unidirectional CF/PEEK Composite" Proc.of the Ninth International Conference on Composite Materials. 267-274 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 大谷隆一: "耐熱性CFRP積層板の層間はく離高温破壊じん性" 日本機械学会論文集 A編. 59. 2234-2240 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 大谷隆一: "一方向強化AS4/PEEK積層板の高温疲労層間はく離き裂伝ぱに対する繊維架橋によるクラックシールディング効果" 日本材料学会第23回FRPシンポジウム講演論文集. (発表予定). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 植松 美彦: "応力休止によるCFRPの高温疲労層間はく離伝ぱの遅延" 日本機械学会講演論文集. 920-78. 148-150 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 植松 美彦: "一方向炭素繊維強化熱可塑性プラスチックスの高温疲労層間はく離き裂伝ぱ" 材料. 42. 59-64 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ryuichi Ohtani: "Mode I Delamination of Carbon Fiber Reinforced Thermoplastic Polymer under Static and Cyclic Creep at Elevated temperatures" ASTM STP. 1174. 23-38 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Takayuki Kiramura: "Effect of Frequency on Delamination Crack Growth in High Temperature Fatigue of Unidirectional CF/PEEK Composite" To be presented in the Ninth International Conference on Composite Materials.

    • Related Report
      1992 Annual Research Report
  • [Publications] 植松 美彦: "一方向強化CF/PEEK積層板の層間はく離破壊じん性に及ぼす温度の影響" 日本機械学会第70期通常総会講演会.

    • Related Report
      1992 Annual Research Report
  • [Publications] 植松 美彦: "耐熱性CFRPの層間はく離破壊じん性およびその温度依存性" 日本材料学会,第22回FRPシンポジウム.

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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