Abstract
In order to study the effect of the interaction and coalescence of multiple surface cracks by slit type surface crack on static fatigue behavior of brittle materials such as glass and ceramics, the various slit length were introduced on the surfaces of plate specimens of glass ceramics by scriber. Glass ceramics used for the experiment is a N-0(about 0.05μm grain size) and N-11(about 1μm grain size) material. It was found that the time-to-failure for a given applied stress significantly decreased with a increase in the distance of the slit length. However, the static fatigue life does not lower in case of the long slit length in the N-11.
