Evaluation of slow crack growth parameters for silicon carbide ceramics |
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Authors: | S. G. Seshadri M. Srinivasan G. W. Weber |
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Affiliation: | (1) Technology and Engineering Division, The Carborundum Company, PO Box 832, 14302 Niagara Falls, New York, USA |
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Abstract: | The difficulties in applying existing dynamic and static fatigue theories to model the slow crack growth behaviour of silicon carbide ceramics are examined critically. The assumptions that the geometric parameter,Y, in the fracture mechanics relation remains unchanged for all flaws during crack growth and that the final crack size is much larger than the initial crack size are found to be unrealistic for silicon carbide ceramics. |
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