Abstract
Soda-lime glass specimens with an indented induced flaw at the center were fractured under a constant load and a cyclic load applied by the four-point bending of plates, concentric-ring loading of plates and diametral compression of disks, respectively. All glass specimens showed a susceptibility to static and cyclic fatigue failure, and their lifetimes increased with decreasing maximum applied stress. Equivalent time-to-failure obtained from the cyclic data, using the assumption that there is no enhanced effect of cycling on the rate of subcritical crack growth, were compared with the static time-to-failure data measured under polyaxial stress states. The influence of cyclic loading on fatigue life was not significant in cases with uniaxial tension, but the cyclic loading effect was obviously seen in both cases of tension-compression and equibiaxial tension.
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