Abstract
Strength tests have been carried out on 280 mm diameter discs of float glass loaded by hydraulic pressure against a 254 mm diameter anvil. This arrangement gives nearly equibiaxial loading over a large part of the plate. Failure stress and position of failure have been determined for a large number of bottom (tin) surface samples subjected to a standard handling procedure. Stresses have been calculated at the points of failure using the large deflection theory. By considering different concentric areas of the discs, and treating failures outside these regions as statistical suspensions, strength distributions have been determined for different stressed areas of the discs. This procedure overcomes the problem experienced by many workers in obtaining consistent samples for tests with different loading geometries. The distributions for the different stressed areas have an essentially constant Weibull modulus and a median stress that increases with decrease in stressed area. Calculations of the stress-area integral for the loading arrangement show good agreement with weakest link predictions.
Published Version
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