Fracture of a brittle particulate composite |
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| Authors: | David J. Green Patrick S. Nicholson J. David Embury |
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| Affiliation: | (1) Ceramic Section, Mineral Sciences Laboratories, Canada Centre for Mineral and Energy Technology, Department of Energy, Mines and Resources, Ottawa, Ontario, Canada;(2) Department of Metallurgy and Materials Sciences, McMaster University, Hamilton, Ontario, Canada |
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| Abstract: | Previous models for crack-particle interactions in brittle composites are modified to account for penetrable obstacles, obstacle shape and secondary crack interactions. The modified model is applied to a glass-unbonded nickel sphere composite system, the experimental aspects of which were summarized in Part 1. Increases in fracture energy are explained in terms of local crack blunting. It is shown that these results fall, as expected, between those for an entirely sharp crack front and an entirely blunt one. |
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