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Effect of Fiber Kinds on Fatigue Strength of Pitch Type CFRP

Research Project

Project/Area Number 63550087
Research Category

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

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionThe University of Tokushima

Principal Investigator

MURAKAMI R.  Univ.of Tokushima, Assoc. Professor, 工学部, 助教授 (00112235)

Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1989: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCFRP / Notched Tensile Strength / Fatigue Fracture / AE Properties / Hardener / Test Temperature / Pitch Type CFRP / PAN Type CFRP / 疲労限度 / AE / 停留き裂 / 切欠き効果
Research Abstract

1. The tensile fracture behavior of the center notched plates has been studied for GFRP. The strength characteristics and the fracture were clearly estimated using the parameter, sigma maxc/E, regardless of the contact of glass fiber.
2. The effect of hardener on tensile fracture behavior of CFRP was investigated using smooth and notched tensile specimens. The tensile strength and the fracture morphology of center matched CFRP plates strongly depend on the test temperature.
3. The effect of test temperature and match radii an the tensile fracture manner of CFRP was investigated by using the smooth and the notched specimens at various temperature and hotcp tip radius The briffle-ductile fransitism behavior existed in CFRP. Tensile strength, Young modulus and fracture morphology of CFRP strongly depended on the test temperature.
4. Fatigue strength of CFRP was investigated by means of the AE meth and fractograpby. The fatigue strength of CFRP decreases with increasing mean stress. A characteristics of AE wane closely relates to the fracture morphology in CFRP.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 金允海,村上理一,西谷弘信: "中央切欠きをもつGFRPの引張りにおける破壊" 日本機械学会論文集. 56. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Riichi Murakami et al: "Analysis on Fatigue Fractur of Pitch Type CFRP by AE Method" Racific Offshore Michanics-1990. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y.H.Kim,R.Murdkami,et al: "the Effects of Testt Fempoature and Hardoner on tensile Fruiture Behami of Center Notdhd CFRP" Pacific Offshore Medianics-1990. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] H.Nishitani,Y.H.Kim,R.Murdkami,et al: "Relation Between Test Temperatures and hotoh Radii in Tensie Fructure Behauior of Center netched CFRP" KSME/JSME Joint conference Fruture & Strength'90. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 西谷弘信,金允海,村上理一: "中央切欠きをもつCFRPの引張破壊形態における試験温度と切欠半経の関係" 日本機械学会第67期通常総会講演会. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 村上理一、山中啓史,ほか2名: "PAN系CFRPの疲労強度とAE特性について" 日本材料学会第39期学術講演会. (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y. H. Kim, R. Murakami, and H. Nisitani: "Fracture Criterion in Tension of Center Notched GFRP Plates" Trans. Jap. Soc. Mech. Eng.(1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] R. Murakami, T. Adachi, K. Akizono, A. Hachiya and H. Nagata: "Analysis on Fatigue Fracture of Pitch Type CFRP by AE Method" Pacific Offshore Mechanics-1990, 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Y. H. Kim, R. Murakami, T. Nonomura, T. Nisitani and S. Okada: "The Effects of Test Temperature and Hardener on Tensile Fracture Behavior of Center Notched CFRP" Pacific Offshore Mechanics-1990, 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] H. Nisitani, Y. H. Kim, R. Murakami, T. Nonomura and S. Okada: "Relation Between Test Temperatures and Notch Radii in Tensile Fracture Behavior of Center Notched CFRP" KSME/JSME Joint Conference Fracture & Strength, '90 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] R. Murakami, K. Yamanaka, S. Uetsuki and T. Inaba: "Fatigue Strength and AE Properties of PAN Type CFRP" J. Soc. Mat. Sci. 1990.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 金允海,村上理一,西谷弘信: "中央切欠きをもつGFRPの引張りにおける破壊" 日本機械学会論文集. 56. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Ri-ichi Murakami,et al: "Analysis on Fatigue Fracture of Pitch Type CFRP by AE Method" Pacific Offshore Medanics-1990. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Y.H.Kim,R.Murakami,et al: "The Effects of Test Femporature and Hardaner on Tensile Fracture Behauior of Center Notched CFRP" Pacific Offshore Medanics-1990. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] H.Nishitani,Y.H.Kim,R.Murakami,et al: "Relation Between Test Temperatures and Notch Radii in Tensile Fracture Behauior of Center Notched CFRP" KSME/JSME Joint Conference Fracture & Strength'90. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 西谷弘信,金允海,村上理一: "中央切欠きをもつCFRPの引張破壊形態における試験温度と切欠半径の関係" 日本機械学会第67期通常総会講演会. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 村上理一,山中啓史,ほか2名: "PAN系CFRPの疲労強度とAE特性について" 日本材料学会第39期学術講演会. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 村上理一: 日本機械学会論文集. 45-46 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 村上理一: 日本機械学会.

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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