The inert strength of a vitreous-bonded abrasive material was measured using bars in four-point bending and disks in ring-on-ring flexure. It was found that the strength of the bend bars could be described by a unimodal flaw population while the strength of the disks was controlled by an exclusive bimodal mixture of flaw populations. The results show that the Weibull multiaxial statistical theory accurately predicts from bend-bar strength the ring-on-ring strength of this material, provided that the strength-controlling flaw population is properly characterized.

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