Chapter 24. Simulation of Microcrack Propagation Behavior in Polycrystalline Alumina Having Initial Residual Stress Field

  1. Todd Jessen and
  2. Ersan Ustundag
  1. Y. Takigawa1,
  2. Y Sakaida2,
  3. Y Yasutomi1 and
  4. S. Ogawa2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294628.ch24

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

Takigawa, Y., Sakaida, Y., Yasutomi, Y. and Ogawa, S. (2000) Simulation of Microcrack Propagation Behavior in Polycrystalline Alumina Having Initial Residual Stress Field, 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.ch24

Author Information

  1. 1

    Research and Development Laboratory Japan Fine Ceramics Center 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan

  2. 2

    Synergy Ceramics Laboratory Fine Ceramics Research Association 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan

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:

  • carbon fiber;
  • silicon carbide matrix composites;
  • fiber oxidation;
  • environmental degradation;
  • diffusion

Summary

Microcrack propagation behavior is observed and simulated in polycrystalline alumina. From the results on In-situ observation of stable crack propagation, it is found that the intergranular crack propagation dominants the fracture. Crystallographic orientation analysis of each grain by Electron Back Scattered Diffraction (EBSD) method reveals that the microcrack propagates through the many types of boundaries. The anisotropic and heterogeneous mechanical properties must be considered in the simulation. Then, the microstructure of polycrystalline ceramics is modeled using the finite element method. A simulation method is developed to predict the microcrack propagation by considering the elasticity of each grain and boundaries in heterogeneous model. The simulation exhibits that intergranular crack growth dominantly occurs in the model ceramics, which is in good agreement with the experimental results.