Chapter 40. Finite Element Studies of Crack Growth in a Ceramic Matrix Composite
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1990 The American Ceramic Society, Inc.
14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10
How to Cite
Lyons, J. S., Meyers, C. W. and Starr, T. L. (2008) Finite Element Studies of Crack Growth in a Ceramic Matrix Composite, in 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313053.ch40
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1990
Print ISBN: 9780470374931
Online ISBN: 9780470313053
The incorporation of short, randomly oriented ceramic fibers or whiskers has the potential for improving the fracture resistance of a ceramic matrix while maintaining component isotropy. The objective of this research is to improve the understanding of the dependence of toughening mechanisms, in slip-cast fused silica composites, on the mechanical and thermal properties of the fiber and of the fiber-to-matrix interface. A two-dimensional finite element model for crack growth is developed, in which the individual microstructural parameters (fiber properties and morphology and the interface bond strength) are varied. This permits the isolation of the effects of each feature on the composite's fracture behavior. Fracture path predictions are presented for a single fiber at different orientations with respect to the crack plane. Increases in material toughness are determined by calculating the strain energy release rate after each increment of crack growth.