Abstract
Experimental studies and analysis of literature data show that while refinements are needed in fracture mechanics models of pores as flaws in glasses, such models are in reasonable overall agreement with observed strength behaviour. Thus, in glasses, single pores are generally “blunter” flaws than machining or other cracks. However, in polycrystalline materials single pores generally act as sharp cracks. Reasons for this glass-polycrystalline difference in terms of mechanisms and their relation to the models are discussed, along with differences in predicted and observed fracture paths. Quite variable and complex behaviour is indicated for origins from two or more pores in glass and polycrystalline bodies.
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Rice, R.W. Pores as fracture origins in ceramics. J Mater Sci 19, 895–914 (1984). https://doi.org/10.1007/BF00540460
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DOI: https://doi.org/10.1007/BF00540460