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Fatigue Damage Mechanism of Heat-Resistant Composites for Primary Structures of Future High-Speed Civil Transport

Research Project

Project/Area Number 11650941
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Aerospace engineering
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

UDA Nobuhide  Faculty of Engineering, KYUSHU UNIVERSITY Associate Professor, 大学院・工学研究院, 助教授 (20160260)

Co-Investigator(Kenkyū-buntansha) ONO Kousei  Faculty of Engineering, KYUSHU UNIVERSITY Research Associate, 大学院・工学研究院, 助手 (90038092)
KUNOO Kazuo  Faculty of Engineering, KYUSHU UNIVERSITY Professor, 大学院・工学研究院, 教授 (90128009)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsHSCT / Heat-Resistant Material / Composite Material / Fatigue / Damage / Carbon Fiber / Polyimide / Delamination / 高温
Research Abstract

The most important technology for future High-Speed Civil Transport (HSCT) is considered to be heat-resistant polymer composites with high toughness for dramatic weight reduction in a vehicle structure. A promising candidate composite system is a carbon fiber/heat-resistant thermoplastic composite, e.g. IM600/PIXA-M.The PIXA-M resin belongs to a thermoplastic polyimide family developed in Japan. In this research, mechanical properties of the IM600/PIXA-M were measured at room temperature, 100℃, and 200℃. Low cycle fatigue tests of laminates made of this composite system were also conducted at room temperature and 200℃.
Young's modulus in fiber direction was almost constant at room and elevated temperatures up to 200℃. However, tensile strength in fiber direction at 200℃ decreased to about 60% of one at room temperature. Young's modulus and tensile strength transverse to fiber direction at 200℃ dropped to about 80% and 20% of ones at room temperature, respectively.
In tensile tests of a quasi-isotropic laminate [+30_2/-30_2/90_2]s, tensile strength at 200℃ decreased to about 70% of one at room temperature. Free-edge delamination extended only to the laminate-thickness length away from the edge even just before fracture of the specimen. Post-first-failture behavior of the laminates was analyzed using classical lamination theory with failure criterion. The analytical results were in good agreement with the experimental results at room temperature and 200℃.
In low cycle fatigue tests of the laminate, the free-edge delamination did not occur until just before fracture of the specimen at room temperature and 200℃ as well. Hence, fatigue life is decided by the onset of the free-edge delamination.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report

Research Products

(13 results)

All Other

All Publications (13 results)

  • [Publications] Nobuhide Uda, et al.: "Edge Delamination of Composite Laminates Under Low Cycle Fatigue"Proc.of 12th Int.Conf.on Composite Materials. 312 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuhide Uda, et al.: "Damage Progression of Composite Laminates Under Low-Velocity Impact"Proc.of 9th US-Japan Conf.on Composite Materials. 477-484 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 加藤日出幸 et al.: "CFRP積層板のモードI層間破壊靭性の速度依存性"九州大学工学集報. 73巻,5号. 585-591 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 加藤日出幸 et al.: "Carbon/Epoxy積層板のモードII層間破壊靭性の速度依存性"九州大学工学集報. 74巻,2号. 107-114 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuhide Uda and Kazuo Kunoo: "Edge Delamination of Composite Laminates Under Low Cycle Fatigue"Proc. of 12th Int. Conf. on Composite Materials. paper 312. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuhide Uda, Kazuo Kunoo, kousei Ono, Tadashi Nagayasu, Toru Izumiya and Kazunori Machida: "Damage Progression of Composite Laminates Under Low-Velocity Impact"Proc. of 9th US-Japan Conf. on Composite Materials. 477-484 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hideyuki kato, Kazuo Kunoo, Nobuhide Uda, Kousei Ono and Tadashi Nagayuasu: "Rate Dependence of Model-I Interlaminar Fracture Toughness in CFRP Laminates"Technology Reports of Kyushu University. Vol.73, No.5. 585-591 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hideyuki Kato, Kazuo Kunoo, Nobuhide Uda, Kousei Ono and Tadashi Nagayasu: "Rate Dependence of Mode-II Interlaminar Fracture Toughness in Carbon/Epoxy Laminates"Technology Reports of Kyushu University. Vol.74, No.2. 107-114 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nobuhide Uda, et al.: "Edge Delamination of Composite Laminates Under Low Cycle Fatigue"Proc.of 12th Int.Conf.on Composite Materials. 312 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nobuhide Uda, et al.: "Damage Progression of Composite Laminates Under Low-Velocity Impact"Proc.of 9th US-Japan Conf.on Composite Materials. 477-484 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 加藤日出幸, et al.: "CFRP積層板のモードI層間破壊靭性の速度依存性"九州大学工学集報. 73巻,5号. 585-591 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 加藤日出幸, et al.: "Carbon/Epoxy積層板のモードII層間破壊靭性の速度依存性"九州大学工学集報. 74巻,2号. 107-114 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nobuhude Uda: "Edge Delamination of Composite Laminates Under Low Cycle Fatigue"Proceedings of the 12th International Conterence on Composite Materials. (未定). (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-03-31   Modified: 2016-04-21  

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