Chapter 10. Stress Rate Effects on Slow Crack Growth Parameters

  1. Hua-Tay Lin and
  2. Mrityunjay Singh
  1. Jonathan A. Salem1 and
  2. Michael G. Jenkins2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294741.ch10

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3

How to Cite

Salem, J. A. and Jenkins, M. G. (2002) Stress Rate Effects on Slow Crack Growth Parameters, in 26th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 23, Issue 3 (eds H.-T. Lin and M. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294741.ch10

Author Information

  1. 1

    NASA Glenn Research Center Cleveland, OH, 44135

  2. 2

    University of Washington Seattle, WA, 98195

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2002

ISBN Information

Print ISBN: 9780470375785

Online ISBN: 9780470294741

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Keywords:

  • parameters;
  • dynamic fatigue testing;
  • chemisorption;
  • solvation;
  • dynamic technique

Summary

The use of dynamic fatigue testing to generate slow crack growth data for SCG parameter estimation assumes that the test specimen lifetime is dominated by a single region of the SCG curve This assumption breaks down when significant portions of the crack growth occur in all three regions of the SCG curve The resultant averaging of data representing all three regions of the SCG curve results in an error in the estimated SCG parameters n and D, and such data may not be accurate for predicting the lifetime of industrial components.

Dynamic fatigue tests covering five orders of magnitude well below the inert strength were performed on an alumina by using ASTM C 1161 “B” flexure specimens. Statistical analysis of the experimental results indicates a statistically significant effect of stress rate on the SCG parameter n for stress rates above several MPa/s The experimental results are in agreement with analytical results of Sudreau et al.