Chapter 49. Time-Dependent Crack Growth in Ceramic Composites: From Single Fibers to Bridged Cracks

  1. Todd Jessen and
  2. Ersan Ustundag
  1. C. A. Lewinsohn,
  2. C. H. Henager Jr. and
  3. R. H. Jones

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294628.ch49

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3

How to Cite

Lewinsohn, C. A., Henager, C. H. and Jones, R. H. (2000) Time-Dependent Crack Growth in Ceramic Composites: From Single Fibers to Bridged Cracks, in 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 21, Issue 3 (eds T. Jessen and E. Ustundag), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294628.ch49

Author Information

  1. Pacific Northwest National Laboratory, PO Box 999. Richland, WA 99352 USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2000

ISBN Information

Print ISBN: 9780470375686

Online ISBN: 9780470294628

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Keywords:

  • fiber-bridged matrix cracking;
  • acoustic emission;
  • stress-strain curve;
  • rupture stress;
  • intermediate temperature stress rupture

Summary

Several failure mechanisms, dictated by environmental conditions, temperature, interphase thickness, etc. occur in continuous fiber-reinforced ceramic matrix composites containing interphases that are susceptible to oxidation. Experimental techniques have been used to identify these mechanisms and conditions under which they occur. Details of the mechanical state of fibers that bridge matrix cracks, during the operation of each mechanism, are required to allow the application of models that can predict time-dependent, subcritical crack growth. This paper will present evidence of environmentally induced failure and discuss a simple method, using the compliance of individual fibers, for describing the stress state of fibers that bridge matrix cracks.