The influence of loading rate on crack bridging processes in Al_2O_3
- Creators
- Tandon, S.
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Faber, K. T.
Abstract
Commercially available alumina of 94% nominal purity was used to examine the influence of loading rate on toughening mechanisms. For fine-grained alumina, the crack resistance, K_R, was found to be independent of crack length and loading rate. Coarse-grained alumina exhibited strongly rising R-curves where the initial fracture toughness, K_0, was found to be independent of the loading rate. The net toughening, ΔK_(SS), in coarse-grained alumina was found to decrease with increasing loading rate. Loading rate effects were independent of testing environment. A rate dependent coefficient of friction was incorporated into a crack bridging model to describe the effect of loading rate on toughness in this system. Predictions based on the bridging models, using the measured coefficients of friction for this material system, are in good agreement with the observed phenomenon.
Additional Information
© 1998 Acta Metallurgica Inc. Published by Elsevier. (Received 15 September 1997; accepted in revised form 31 December 1997) This work was supported by the National Science Foundation Center for Advanced Cement Based Materials at Northwestern University.Attached Files
Published - 1-s2.0-S1359645498000238-main.pdf
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Additional details
- Alternative title
- The influence of loading rate on crack bridging processes in Al2O3
- Eprint ID
- 49408
- Resolver ID
- CaltechAUTHORS:20140908-181325151
- NSF
- Created
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2014-09-09Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field