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1992 Fiscal Year Final Research Report Summary

Fracture mechanisms and mechanics of fiber-reiforced ceramic composites.

Research Project

Project/Area Number 03453073
Research Category

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

Allocation TypeSingle-year Grants
Research Field 無機工業化学・無機材料工学
Research InstitutionToyahashi University of Technology

Principal Investigator

SAKAI Mototsugu  Toyohashi University of Technology Faculty of Technology Professor., 工学部, 教授 (50124730)

Project Period (FY) 1991 – 1992
KeywordsFiber-reinforcement / Ceramic composite / Strength / Fracture toughness / Fracture physics
Research Abstract

The major focus of the research project is on the strengthening and toughening microfracture processes and mechanisms of fiber-reinforced ceramic matrix composites through theoretical as well as experimental considerations. The results of investigations have been reported through ten technical papers published mainly in major international journals.
It is emphasized in this project that the most essential microfracture processes and mechanisms which controls the fracture toughness and strength of fiber-reinforced composites are; (a) first matrix cracking, (b) crack-face fiber bridging behind the crack-tip, and (c) pulling broken fibers out of matrix. Pertinent experimental techniques and theoretical considerations have been developed in this project for quantitatively analyzing these microfracture processes. They have been applied to the fracture of; (a) a unidirectionally reinforced carbon-fiber/carbon=matrix composite, (b) two-dimentionally reinforced carbon-fiber/carbon-matrix composites, and (c) carbon-fiber/silicon nitride-matrix composites having reinforcing fibers with different thicknesses (diameters).
Based on the experimental and theoretical results, materials design for structural ceramic composites with improved strength and toughness was conducted.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] M.Sakai: "Fracture mechanics and mechanisms of fiber-reinforced brittle matrix composites" J.Ceram.Soc.Jpn. 99. 983-992 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Miyajima,M.Sakai: "The fracture toughness for first matrix cracking of a unidirectionally reinforced carbon/carbon composite" J.Mater.Res.6. 2312-2317 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Sakai: "Analysis of fiber-bridging by extended Dagdale model" ISIJ Int.32. 937-942 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Suzuki,M.Sato,M.Sakai: "Fiber pullout processes and mechanisms of a carbon fiber reinforced silicon nitride ceramic composite" J.Mater.Res.7. 2869-2875 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Suzuki,T.Miyajima,M.Sakai: "The role of fiber/matrix interface in the first matrix cracking of fiber-reinforced brittle matrix composites" Comp.Sci.Tech.(1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.H.Lutz,M.Sakai: "R-curve and compliance change upon renotching" J.Am.Ceram.Soc.(1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Sakai: "Fracture mechanics and mechanisms of fiber-reinforced brittle matrix composites" J. Ceram. Soc. Jpn. 99. 983-992 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Miyajima and M. Sakai: "The fracture toughness for first matrix cracking of a unidirectionally reinforced carbon/carbon composite" J. Mater. Res.6. 2312-2317 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sakai: "Analysis of fiber-bridging by extended Dagdale model" ISIJ Int.32. 937-942 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Suzuki, M. Sato, and M. Sakai: "Fiber pullout processes and mechanisms of a carbon fiber rein-forced silicon nitride ceramic composite" J. Mater. Res.7. 2869-2875 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Suzuki, T. Miyajima, and M. Sakai: "The role of fiber/matrix interface in the first matrix cracking of fiber-reinforced brittle matrix composites" Comp. Sci. Tech.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E.H. Lutz and M. Sakai: "R-curve and compliance change upon renotching" J. Am. Ceram. Soc.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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