DETERMINATION OF THE FLOAT GLASS FRACTURE TOUGHNESS WITH NOTCHED SPECIMEN, MICROSTATISTICAL APPROACH

摘要

The concept of notched stress intensity factor is naturally applied on the determination of the of brittle materials toughness ; critical notch stress intensity factor has been used in this study as a measure of the static and dynamic fracture toughness on three-point-bending glassy specimens with various notch radius. A statistical approach to the fracture of glass is described. A dynamic model is proposed which enables determination of the number of microcracks involved in the fracture process.