• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of estimation system for fatigue life of CFRP

Research Project

Project/Area Number 04555029
Research Category

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

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionNagoya University

Principal Investigator

MURAKAMI Sumio  Nagoya Univ., Engineeing, Professor, 工学部, 教授 (10023053)

Co-Investigator(Kenkyū-buntansha) TSUSHIMA Eiki  Tonen Co., CF Project, Team Leader, CFプロジェクト, チームリーダー
KAWAI Masamichi  Univ.of Tsukuba, Engineering, Associate Prof, 構造工学系, 助教授 (90169673)
ZAKO Masaru  Osaka Univ., Engineering, Professor, 工学部, 教授 (40170831)
TANAKA Eiichi  Nagoya Univ., Engineering, Associate Professor, 工学部, 助教授 (00111831)
KANAGAWA Yasushi  Nagoya Univ., Engineering, Associate Professor, 工学部, 助教授 (90023481)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥18,500,000 (Direct Cost: ¥18,500,000)
Fiscal Year 1994: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1993: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1992: ¥12,000,000 (Direct Cost: ¥12,000,000)
KeywordsCFRP / Fatigue life / Damage process / Inelastic deformation / Damage mechanical analysis / Multi-axial loading / Estimation of fatigue life / AE method / 疲労損過程 / 非弾性変形 / 多軸疲労破壊基準 / マトリックスき裂 / 層間はく離 / 負荷応力履歴
Research Abstract

Inelastie deformation fehavior of CFRP under quasi-statie and fatigue loading has been elucidated for three years from 1992 to 1994. Specially, internal fatigue damages of matrix crack and delamination in the fatigue process were quantitatinely estimated by means of micrography, and furthermore on-time monitoring of fatigue damage initiation and evolution by AE method was carried out successfully. From these results, it makes clean that a estimation system for fatigue life of CFRP is possibly developed with AE method. Results obtained in the research are as follows ;
1)Stress-strain relationships of [<plus-minus>45゚]_4 CFRP tubular specimen were elucidated under various loading conditions. It was recognized that matrix showed similar behavior as work-hardening at the early stage of fatigue and that macroscopical buckling occured at the last stage of fatigue by delamination.
2)From detail investigation between fatigue damage and mechanical properties of CFRP,it made clean that elastic modulus and inelastic strain were useful measures for the fatigue life.
3)The continuum damage model based on the flow rule was modified to a inelastie constitutine equation in considering initiation and evolution of internal damage. And then, the modified model was applied to experimental results successfully.
4)Power spectrum of AE signal in fatigue process of CFRP was able to nondestructively identify the internal damages such as matrix crack, delamination and fiber breakage, and furthermore it could estimate the fatigue life.
5)Complex inelastic deformation behavior of CFRP in fatigue process was described by modeling in frame of the continuum damage mechanics.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 石田 孝明 他3名: "炭素繊維強化複合材料円管[±45°]_4の引張り-圧縮疲労損傷と非弾性変形に対する応力比の影響" 機械学会論文集. 60. 105-112 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kanagawa et. al.: "Observation of Internal Damage and Inelastic Deformation of Graphite/Epoxy Tubes[±45°]_4 under Cyclic Axial Loading" Science and Engineering of Composite Materials. 3. 111-121 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 座古 勝 他2名: "損傷異方性を考慮した複合材料用有限要素法の開発" 材料. 43. 265-270 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 座古 勝 他2名: "複合材料の三次元熱応力解析" 材料. 43. 402-407 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 金川 靖 他4名: "損傷を考慮したCFRPの非弾性変形挙動の解析" 複合材料学会誌. 21. 27-33 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Murakami et.al.: "Observation of Internal Damage and Inelastic Deformation of Graphite/Epoxy Laminate Tubes under Cyclic Tension-Compression" Proc. IUTAM Symposium. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Ishida et al.: ""Effects of stress ratio on the inelastic deformation and fatigue damage of Graphite/epoxy tubes[<plus-minus>45゚]_4 under Tension-Compression Loading."" JSME. Vol.60. 105-112 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kanagawa et.al.: ""Observation of internal damage and inelastic deformation of Graphite/epoxy tubes[<plus-minus>45゚]_4 under cyclic axial loading."" Science and Engineering of Composite Materials. Vol.3. 111-121 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Zako et al.: ""Development of finite element method for composite materials considering anisotropic damage state."" J.Soc.Mat.Sci.Vol.43. 265-270 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Zako et al.: ""Three-dimensional thermal stress analysis of Composites."" J.Soc.Mat.Sci.Vol.43. 402-407 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kanagawa et al.: ""Analysis of inelastic deformation of CFRP based on damage theory."" J.Japan Soc.Composite Materials. Vol.21. 27-33 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Murakami et al.: ""Observation of internal damage and inelastic deformation of Graphite/epoxy laminate tubes under cyclic tension-compression" Proc.IUTAM Symposium. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Ishida et al.: ""Development of internal damage in CFRP[<plus-minus>45゚]_4 laminate tubes under cyclic tension-compression loading and its quantitatine evaluation."" JSME. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Shimizu et al.: ""Stochastic simulation of impact damage process."" Proc.38th Japan Cong.on Mat.Res.in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kanagawa et al.: ""The effect of interlaminar stresses on laminate theory."" J.Composite Moteridls. (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Kanagawa et al.: ""Analysis on internal damage in FRP laminates by continuum damage mechanics."" J.Japan Soc.Composite Materials. (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 金川,石田,村上,田中: "Observation of Interval Damage and Inelastic Deformation of Graphitey Epoxy Tubes [±45°]4 under Cyclic Axial loocling" Soience and Engineering of Composite Materials. 3. 111-121 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 金川,村上,小坂,白,石田: "損傷を考慮したCFRRの非弾性変形挙動の解析" 日本複合材料学会誌. 21. 27-33 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 村上,金川,石田,川崎: "Obervation of Interval Damage and Intlastic Deformation of Graphitel Epoxy Laminate Tubues under Cyclic Tcension-Compression" Proc.IUTAM Synposium.Deumark. (in press). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 石田,金川,村上,安田: "CFRP[±45°]4積層円管の繰返し引張-圧縮応力下における内部損傷の発達と定量的評価" 日本機械学会論文集. 3月号(掲載決定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 清水,村上,金川,田中,中嶋: "Stochastic Simuration of Impact Damage Process" Proc.38th Japan Coug.on Mat.Res.4月(刊行予定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 金川靖: "CFRP[±45゚]_4薄肉円管の引張-圧縮による疲労損傷過程" 材料. 43(487). 55-61 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 石田孝明: "炭素繊維強化複合材料円管[±45゚]_4の引張り-圧縮疲労損傷過程と非弾性変形に対する応力比の影響" 機械学会論文集A編. 60(569). 104-112 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Kanagawa: "Inelastic Deformation and Fracture of Laminated Grophitu/Epoxy tubes under Multiaxial Stress State" JSME International Journal. 36. 97-103 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 金川 靖: "繰返し根張-圧縮応力下におけるCFRP内管[I45°]4の疲労損傷と非弾性変形に対する圧縮応力の影響" 日本機械学会論文集A編.

    • Related Report
      1992 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi