Inclusion‐Initiated Fracture Model for Ceramics
- 8 March 1990
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 73 (3) , 639-644
- https://doi.org/10.1111/j.1151-2916.1990.tb06565.x
Abstract
The fracture of ceramics initiating from a typical inclusion is analyzed. The inclusion is considered to have a thermal expansion coefficient and fracture toughness lower than those of the matrix and a Young's modulus higher than that of the matrix. Inclusion‐initiated fracture is modeled for a spherical inclusion using a weight function method to compute the residual stress intensity factor for a part‐through elliptical crack. The results are applied to an α‐Al2O3 inclusion embedded in a tetragonal ZrO2 ceramic. The strength predictions agree well with experimental data.Keywords
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