Chapter 32. Microcracking and Elastic Moduli Reductions in Unidirectional Nicalon-CAS Composite Under Cyclic Fatigue Loading

  1. John B. Wachtman Jr.
  1. Prashant G. Karandikar and
  2. Tsu-Wei Chou

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch32

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Karandikar, P. G. and Chou, T.-W. (1994) Microcracking and Elastic Moduli Reductions in Unidirectional Nicalon-CAS Composite Under Cyclic Fatigue Loading, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch32

Author Information

  1. Center for Composite Materials, and Materials Science Program, University of Delaware, Newark, DE 19716, USA

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • compatibility;
  • microstructure;
  • phase composition;
  • characterized;
  • isostatically

Summary

Unidirectional Nicalon fiber reinforced calcium alumino-silicate glassceramic composite specimens were subjected to tension-tension cyclic fatigue loading. Microcrack densities, longitudinal Young's modulus and major Poisson's ratio were measured at regular intervals of load cycles. The matrix crack density increased gradually with fatigue cycle. The Young's modulus and Poisson's ratio decreased gradually with fatigue cycles. Simple correlations were developed between crack density and moduli reduction data from quasi-static tests. These correlations were used successfully to predict the moduli reductions under cyclic loading.