The ball indentation experiment was used to determine the density distributions of surface cracks of various severities on flat glass plates. The fracture load histograms that result from a large number of indentations with a ball indenter are the basis of the information on the distribution of cracks. The integral equation relating the probabilities of fracture as a function of load to the crack distribution function was solved with an operational inversion by means of the two-sided Laplace transform. The distributions of cracks were calculated for a chemical Pyrex glass and for a window glass.
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A. S. Argon (1959) studied this question.
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