Subcritical crack growth in glass shows three characteristic regions, depending on crack velocity. Among three regions, in region III, where water does not affect crack‐growth behavior, the slope of the crack‐growth curve can be correlated with the intrinsic nature of glass fracture. In this study, to measure the crack velocity in region III, a periodic stress wave was applied to produce fracture‐surface markings in the double‐cleavage‐drilled compression specimen. The crack‐growth data obtained were compared with results obtained via direct observation of the crack front. As a result, this method, by using stress‐wave fractography, was found to be effective to obtain the crack‐growth curve in region III.
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Yoshida et al. (1999) studied this question.
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