Chapter 66. Analysis of Cmc C-Coupon Specimens for Structural Evaluation

  1. Mrityunjay Singh and
  2. Todd Jessen
  1. Ali Abdul-Aziz1,
  2. Anthony M. Calomino2 and
  3. Frances I. Hurwitz2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294680.ch66

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3

How to Cite

Abdul-Aziz, A., Calomino, A. M. and Hurwitz, F. I. (2001) Analysis of Cmc C-Coupon Specimens for Structural Evaluation, in 25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 22, Issue 3 (eds M. Singh and T. Jessen), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294680.ch66

Author Information

  1. 1

    Cleveland, State University Cleveland, OH 44115

  2. 2

    NASA Glenn Research Center Cleveland, Ohio 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375730

Online ISBN: 9780470294680

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Keywords:

  • ceramic;
  • geometry;
  • materials;
  • thermal;
  • aerospace

Summary

The C-coupon provides a convenient means of characterizing the interlaminar strength of a ceramic matrix composite (CMC). Analysis of this test specimen was completed for a variety of commercially available materials, including Honeywell Advanced Composite's SylramicTM\SiC composite fabricated using melt infiltration (MI), and Composite Optics Incorporated's HiNicalonTM\SiNC (S200) system. Finite element analyses (FEA) were carried out for a C-coupon geometry subjected to both mechanical and thermal gradient loading. Resulting stress profiles include hoop and radial stresses in the curved section. Peak levels and locations of both the radial and hoop stresses are identified. Stresses predicted by FEA are in good agreement with those obtained from a closed form solution of a multilayered elastic beam. Stresses were evaluated as a function of coupon thickness and mean radius.