Abstract
T he W eibull statistical treatment of brittle strength is used to compute the mean fracture load and the standard deviation of fracture load for the ring cracking of glass by spherical indenters. An extension of the Weibull treatment allows the mean crack location also to be calculated. Predictions of mean load, standard deviation of load and mean crack location, all as a function of indenter radius, are made from material properties determined in bending tests. Good agreement is found with experiment over a wide range of indenter sizes.
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