ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 12 January 2005
Page Count: 6

Fracture and Strength of Ceramic Notched Elements under Compression

Zheng, X
Northwestern Polytechnical University, Xi'an,

Zhao, K
Northwestern Polytechnical University, Xi'an,

Yan, J
Northwestern Polytechnical University, Xi'an,

Wang, H
Northwestern Polytechnical University, Xi'an,

(Received 18 November 2002; accepted 20 September 2004)

Abstract

Experimental results of the compression fracture strength of ceramic notched elements are summarized and analyzed in the present paper. The fracture model of ceramic notched elements under compression can be put forward based on Griffith's theory of brittle fracture. It is shown that the fracture of Al₂O₃ ceramics under compression loading is a typical brittle one induced by tensile stress, irrespective of whether the specimens are with or without a notch. The test results show that the product of the compression notch strength and the stress concentration factor is equal to the compression fracture strength, and the validity of the above-mentioned fracture model is thus checked. Finally, the procedures for predicting the fracture criteria with given survivability for Al₂O₃ ceramic notched elements can be developed based on the test results and the analysis mentioned above.

Keywords:
ceramic, brittle fracture, fracture criterion, compression strength, notch strength, probability distribution, survivability

Paper ID: JTE11802
DOI: 10.1520/JTE11802
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