Chapter 33. Finite Element Prediction of the Fracture Mechanisms of Short Fiber-Reinforced Ceramic Matrix Composites

  1. John B. Wachtman Jr
  1. J. S. Lyons

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch33

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Lyons, J. S. (1991) Finite Element Prediction of the Fracture Mechanisms of Short Fiber-Reinforced Ceramic Matrix Composites, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch33

Author Information

  1. Department of Mechanical Engineering University of South Carolina Columbia, SC 29208

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • polycrystalline;
  • mechanisms;
  • microstructural;
  • morphology;
  • geometry

Summary

This research explores the interrelationship between the fracture mechanisms of short fiber-reinforced ceramic composites and the properties of the fiber and of the fiber-to-matrix interface. A two-dimensional finite element model for crack growth is developed, in which fiber orientation, residual stress state, and interface bond strength are varied. This approach permits the isolation of the effects of individual features on the fracture behavior and the strain energy release rate after each increment of crack growth. Fracture paths are predicted for individual fibers at discrete locations with respect to the primary crack plane. Increases in material toughness are determined by calculating the strain energy release rate after each increment of crack growth. Results of the model compare well with experimental observations of the fracture behavior of Nextel© fiber-reinforced slip cast fused silica matrix composites.