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Journal of Materials Science

, Volume 29, Issue 18, pp 4718–4728 | Cite as

Strength distribution of Carborundum polycrystalline SiC fibres as derived from the single-fibre-composite test

  • W. A. Curtin
  • A. N. Netravali
  • J. M. Park
Papers

Abstract

The single-fibre—composite (s.f.c) test, in which a fibre is embedded in an epoxy matrix and the composite tested in tension, was employed to obtain the statistical strength distribution of Carborundum SiC ceramic fibres over the range of gauge lengths from 0.5 to 20 mm. The raw s.f.c. test data was organized into three independent forms: the number of fibre breaks versus applied stress; the fibre fragment length distribution at the end of the test; and the fibre strength versus fragment length during testing. The data was interpreted using two different models of the fibre/epoxy—matrix interface, and it was found that a constant shear stress model could not self-consistently fit all of the s.f.c. data, whereas an elastic interface model provided good fits to all of the data. The applicability of the elastic interface model was supported by the absence of interfacial debonding and the rough fibre/matrix interface, which promoted mechanical interlocking. The s.f.c. test derived strength of σ0 = 1500 MPa at a gauge length of 20 mm, with a Weibull modulus of m = 9, agreed fairly well with independent tension test results obtained on 254 mm length samples. Obtaining self-consistent fits to all of the manifestations of the s.f.c. data requires careful testing and analysis, but the present work demonstrates that the s.f.c. test can be a powerful tool for the accurate and independent assessment of fibre strengths at small gauge lengths.

Keywords

Gauge Length Epoxy Matrix Fibre Strength Strength Distribution Weibull Modulus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A. G. Metcalfe and G. K. Schmitz, in Proceedings of the 67th Meeting of the ASTM (ASTM, Philadelphia, PA, 1964) p. 1075.Google Scholar
  2. 2.
    A. Kelly and W. R. Tyson, J. Mech. Phys. Solids 13 (1965) 329.CrossRefGoogle Scholar
  3. 3.
    B. W. Rosen, AIAA J. 2 (1964) 1985; C. Zweben and B. W. Rosen, AIAA J. 6 (1968) 2325.CrossRefGoogle Scholar
  4. 4.
    W. A. Fraser, F. H. Ancker, A. T. Dibenedetto and B. Elbirli, Polym. Comp. 4 (1983) 238.CrossRefGoogle Scholar
  5. 5.
    L. T. Drzal, M. J. Rich and P. F. Lloyd, J. Adhesion 16 (1982) 1.CrossRefGoogle Scholar
  6. 6.
    S. H. Own, R. V. Subramanian and S. C. Saunders, J. Mater. Sci. 21 (1986) 3912.CrossRefGoogle Scholar
  7. 7.
    W. D. Bascom and R. M. Jensen, J. Adhesion 19 (1986) 219.CrossRefGoogle Scholar
  8. 8.
    A. N. Netravali, R. B. Henstenburg, S. L. Phoenix and P. Schwartz, Polym. Comp. 10 (1989) 226.CrossRefGoogle Scholar
  9. 9.
    B. Yavin, H. E. Gallis, J. Scherf, A. Eitan and H. D. Wagner, Polym. Comp. 12 (1991) 436.CrossRefGoogle Scholar
  10. 10.
    H. L. Cox, Brit. J. Appl. Phys. 3 (1951) 72.CrossRefGoogle Scholar
  11. 11.
    W. A. Curtin, J. Mater. Sci. 26 (1991) 5239.CrossRefGoogle Scholar
  12. 12.
    W. Weibull, J. Appl. Mech. (ASME) 18 (1951) 293.Google Scholar
  13. 13.
    R. B. Henstenburg and S. L. Phoenix, Polym. Comp. 10 (1989) 385.CrossRefGoogle Scholar
  14. 14.
    A. Kelly and N. H. Macmillan, “Strong solids”, 3rd Edn (Clarendon Press, Oxford, 1986) Ch. 6.Google Scholar
  15. 15.
    W. A. Curtin, accepted in Polym. Comp. Google Scholar
  16. 16.
    G. V. Srinivasan and V. Venkateswaran, in Proceedings of the 17th Annual Conference on Composites and Ceramics, Cocoa Beach, FL (1993)Google Scholar
  17. 17.
    G. V. Srinivasan, Private communication.Google Scholar
  18. 18.
    W. A. Curtin, J. Amer. Ceram. Soc. 74 (1991) 2837.CrossRefGoogle Scholar
  19. 19.
    W. A. Curtin, J. I. Eldridge and G. V. Srinivasan, J. Am. Cer. Soc. 76 (1993) 2300.CrossRefGoogle Scholar
  20. 20.
    H. C. Cao, E. Bischoff, O. Sbaizero, M. Ruhle, A. G. Evans, D. B. Marshall and J. J. Brennan, J. Amer. Ceram. Soc. 73 (1989) 1691.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • W. A. Curtin
    • 1
  • A. N. Netravali
    • 2
  • J. M. Park
    • 2
  1. 1.BP Research/Carborundum Co.ClevelandUSA
  2. 2.Department of Textiles and ApparelCornell UniversityIthacaUSA

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