ON THE FRACTURE ENERGY OF GLASS
VERMONT UNIV BURLINGTON DEPT OF MECHANICAL ENGINEERING
Pagination or Media Count:
The fracture energy of glass has been measured at crack velocities ranging from 10 to the minus 7th power to 0.01 cms. per sec. both in normal air and in various environments. It shows no minimum value but decreases logarithmically as the velocity gets less. The effects of repeated loading on the crack propagation rate are strongly dependent on the frequency of the loading. These results differ from the effects in metals where the crack propagation rate is substantially independent of the loading frequency and are in accord with predictions based on the theory of glass acting as a ductile material.
- Ceramics, Refractories and Glass