Abstract
Experimental observations of stable Mode I fatigue crack growth at room temperature in notched plates of brittle solids subjected to fully compressive far-field cyclic loads have recently been reported. !n this paper, we outline an experimental procedure whereby the fracture toughness and R-curves for ceramics can be determined in bending (or tension) after pre-cracking notched specimens in uniaxial cyclic compression to produce a controlled and through -thickness fatigue flaw. The capability of this technique to provide reproducible fracture toughness values in illustrated with the aid of experimental results obtained for coarse-grained and fine-grained aluminium oxide.
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Suresh, S., Ewart, L., Maden, M. et al. Fracture toughness measurements in ceramics: Pre-cracking in cyclic compression. J Mater Sci 22, 1271–1276 (1987). https://doi.org/10.1007/BF01233120
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DOI: https://doi.org/10.1007/BF01233120