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Crack-Growth Resistance of Microcracking Brittle Materials

Evans, A. G. and Faber, K. T. (1984) Crack-Growth Resistance of Microcracking Brittle Materials. Journal of the American Ceramic Society, 67 (4). pp. 255-260. ISSN 0002-7820. doi:10.1111/j.1151-2916.1984.tb18842.x.

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A mechanics model of microcrack toughening is presented. The model predicts the magnitude of microcrack toughening as well as the existence of R-curve effects. The toughening is predicated on both the elastic modulus diminution in the microcrack process zone and the dilatation induced by microcracking. The modulus effect is relatively small and process-zone-size-independent. The dilatational effect is potentially more substantial, as well as being the primary source of the R curve. The dilatational contribution is also zone-size-dependent. The analysis demonstrates that microcrack toughening is less potent than transformation toughening.

Item Type:Article
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Faber, K. T.0000-0001-6585-2536
Additional Information:© 1984 The American Ceramic Society. Received July 26. 1983; revised copy received November 28, 1983; approved December 6, 1983. Support for A. G. Evans was provided by the Office of Naval Research under Contract No. N00014-81-K-0362 and support for K. T. Faber was provided, in part, by the National Science Foundation under Grant No. DMR8305800.
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Office of Naval Research (ONR)N00014-81-K-0362
Issue or Number:4
Record Number:CaltechAUTHORS:20140908-181331228
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49457
Deposited By: George Porter
Deposited On:11 Sep 2014 18:25
Last Modified:10 Nov 2021 18:44

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