Chapter 2. Load Ratio Effects on the Fatigue Behavior of Silicon Carbide Fiber Reinforced Silicon Carbide

  1. John B. Wachtman Jr.
  1. W. R. Moschelle

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314500.ch2

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

How to Cite

Moschelle, W. R. (1994) Load Ratio Effects on the Fatigue Behavior of Silicon Carbide Fiber Reinforced Silicon Carbide, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch2

Author Information

  1. Wright Laboratory, Wright-Patterson AFB, OH 45433

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375327

Online ISBN: 9780470314500

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Keywords:

  • endurance limit;
  • silicon carbide;
  • infiltration;
  • microcracking

Summary

R=-1.0 fatigue tests were conducted on chemical vapor infiltrated, quasi-isotropic SiC/SiC. The endurance limit was determined to be 63% of ultimate stress. Matrix cracking played a role in damage growth although it was much less than has been observed in hot-pressed CMCs. All failures were tensile in nature. When R=0.1 tests were done, the resultant S-N curve and endurance limit were very similar to the R=-1.0 results, indicating that compression did not play a role in fatigue life for R=-1.0 fatigue.