Chapter 12. Micro-Mechanics of Compressive Fracture in Particulate Reinforced Ceramics

  1. John B. Wachtman Jr.
  1. George Laird Ii1 and
  2. T. C. Kennedy2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch12

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

How to Cite

Ii, G. L. and Kennedy, T. C. (1994) Micro-Mechanics of Compressive Fracture in Particulate Reinforced Ceramics, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313954.ch12

Author Information

  1. 1

    U.S. Bureau of Mines Albany, OR 97321

  2. 2

    Oregon State University Corvallis, OR 97331

Publication History

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

ISBN Information

Print ISBN: 9780470375174

Online ISBN: 9780470313954

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Keywords:

  • particle;
  • matrix;
  • friction;
  • perpendicular;
  • axisymmetric

Summary

SiC, Si3N4, and M-glass reinforced with TiB2, SiC, and Ni respectively, were modeled using finite element analysis. Debonding between the matrix and particle was assumed; interfacial friction was modeled with friction coefficients (μ) from 0.0 to 0.25. Stress intensity factors (KI) were calculated for an annular crack parallel to compressive loading. Numerical results showed with a frictionless interface stiff particles tended to force open the crack. Conversely, with μ = 0.1 and 0.2, the crack flanks were restrained against the particle and KI was decreased at the crack tip. This toughening effect was more pronounced as the elastic moduli mismatch was increased.