Link of the critical temperature of brittleness with the geometry of the stress concentrator and loading rate

It is shown that the critical temperature of brittleness, defined as the temperature at which the critical condition is reached, i.e., local fracture in the tip of the structural stress concentrator, is directly connected with the characteristics of strength, yield, overstrength of the total yield and can be determined by calculation. The proposed approach can be used for developing a method for the determination of the critical brittleness temperature of parts with stress concentrators.