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FRP UNIT STRUCTURE AND JOINT STRUCTURE MOLDED BY VACUUM ASSISTED RESIN TRANSFER MOLDING (VARTM) WITH MULTI-AXIAL KNITTED FABRIC

Research Project

Project/Area Number 16560704
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Naval and maritime engineering
Research InstitutionKANAZAWA INSTITUTE OF TECHNOLOGY

Principal Investigator

KIMPARA Isao  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, PROFESSOR, 工学部, 教授 (50011101)

Co-Investigator(Kenkyū-buntansha) MIYANO Yasushi  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, PROFESSOR, 工学部, 教授 (80113033)
NAKADA Masayuki  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, ASSOCIATE PROFESSOR, 工学部, 助教授 (00247438)
SAITO Hiroshi  KANAZAWA INSTITUTE OF TECHNOLOGY, COLLEGE OF ENGINEERING, RESEARCHER, 工学部, 研究員 (70367457)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsVARTM / CFRP / VINYLESTER RESIN / RESIN VISCOSITY / JOINT / STACKING SEQUENCE / LAP LENGTH / JOINT STRENGTH
Research Abstract

1.CFRP laminates which consists of T700 carbon fiber multi-axial knitted fabric and vinylester resin were molded by vacuum assisted resin transfer molding (VARTM). In VARTM products, the resin rich often occurred around resin inlet, accordingly the gradients of fiber volume fraction and mechanical property were observed. These gradients of properties were decreased by adding of styrene monomer to matrix resin in order to decrease the resin viscosity.
2.Relationship among the stacking sequence of joint, joint length and joint strength of T700 multi-axial knitted CFRP was evaluated. The joint strength of specimens with joint face of 0°/0° was the highest, and the joint strength was not affected by joint length. In addition, the strength of joint consisted of 90°or mat layers increased with increasing of joint length. Conversely, joint length did not affected the joint strength consisted of 45° layers.
3.In molding of T700 multi-axial knitted CFRP joint structures, the effect of differences between joint adhesive methods, ‘wet-on-wet' molding and 'dry-on-wet' molding, on joint strength was evaluated. ‘Dry-on-wet' molding is the method in which the one side joint face adheres to the other side joint face after curing of CFRP laminates. ‘Wet-on-wet' molding is the method in which joint faces are stacked before resin impregnation. The joint strength of specimen molded by ‘wet-on-wet' was 10% higher than that of specimen molded by'dry-on-wet.
4.As the reference material of T700 multi-axial knitted CFRP,T300 plain woven CFRP joint structures were molded by ‘wet-on-wet' and ‘dry-on-wet' VARTM, and the effect of differences between two methods on joint strength were evaluated. Consequently, ‘wet-on-wet' joints showed approximately 55% higher strength than ‘dry-on-wet' joints. In comparison between T700 multi-axial knitted CFRP and T300 plain woven CFRP, the joint strength of T700 was about 20% higher than that of T300.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (6 results)

All 2006 Other

All Journal Article (6 results)

  • [Journal Article] VARTM法による多軸ニットファブリックCFRP積層板の力学的特性2006

    • Author(s)
      斉藤 博嗣, 金原 勲
    • Journal Title

      材料システム 24

      Pages: 47-55

    • NAID

      40007351328

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Environmental effects on damage tolerance performance of CFRP laminate for marine use2006

    • Author(s)
      H.Saito, I.Kimpara
    • Journal Title

      材料システム 24

      Pages: 27-38

    • NAID

      130007975986

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] MECHANICAL PROPERTIES OF MULTI-AXIAL KNITTED CFRP LAMINATE MOLDED BY VARTM2006

    • Author(s)
      HIROSHI SAITO, ISAO KIMPARA
    • Journal Title

      MATERIALS SYSTEM VOL.24

      Pages: 47-55

    • NAID

      130007976017

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] ENVIRONMENTAL EFFECTS ON DAMAGE TOLERANCE PERFORMANCE OF CFRP LAMINATE FOR MARINE USE2006

    • Author(s)
      HIROSHI SAITO, ISAO KIMPARA
    • Journal Title

      MATERIALS SYSTEM VOL.24

      Pages: 27-38

    • NAID

      130007975986

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 衝撃損傷を受けた多軸ニットファブリックCFRP積層板の疲労損傷進展観察

    • Author(s)
      斉藤 博嗣, 金原 勲
    • Journal Title

      日本実験力学会誌 (印刷中)

    • NAID

      10018147179

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] OBSERVATION OF DAMAGE GROWTH BEHAVIOR OF IMPACTED MULTI-AXIAL KNITTED FABRIC CFRP LAMINATE UNDER FATIGUE LOADING

    • Author(s)
      HIROSHI SAITO, ISAO KIMPARA
    • Journal Title

      JOURNAL OF THE JAPANESE SOCIETY FOR EXPERIMENTAL MECHANICS (IN PRESS)

    • NAID

      10018147179

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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