Chapter 13. Life Prediction Tool for Ceramic Matrix Composites at Elevated Temperatures

  1. Don Bray
  1. Scott Case,
  2. Nirmal Iyengar and
  3. Ken Reifsnider

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch13

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Case, S., Iyengar, N. and Reifsnider, K. (1998) Life Prediction Tool for Ceramic Matrix Composites at Elevated Temperatures, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch13

Author Information

  1. Virginia Tech Blacksburg, VA 24061–0219

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

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Keywords:

  • ergonomists;
  • capabilities;
  • human dimensions;
  • metabolic energy;
  • cumulative trauma disorders

Summary

This paper describes the development of a ceramic matrix composite component design tool that integrates the life prediction methodology, MRLife, with a finite element code CSTEM. The life prediction methodology is based on damage mechanics using residual strength as the damage metric and the critical element concept. Previous work has shown that such an approach is able to give accurate predictions of fatigue lives under combined mechanical and thermal loads. The development of the design tool based on this technique involves modifying the finite element program to account for damage in the component and the linking of the lifing code to it. At the component level, damage results in the redistribution of stresses while at the element level the same damage causes changes in the local stress state and changes the remaining strength in the component to propagate failure. The use of the design tool is described by means of a case study involving the life prediction of a composite notched plate at high temperature and cold grips under an axial fatigue load at high temperature.