METHODS FOR THE CONSTRUCTION OF THE KINETIC DIAGRAMS OF FATIGUE FRACTURE FOR STEELS UNDER THE CONDITIONS OF TRANSVERSE SHEAR WITH REGARD FOR THE FRICTION OF CRACK LIPS

摘要

We propose the design of a specimen for the investigation of the fatigue fracture of steels under transverse shear. A formula for the determination of the stress intensity factor with regard for the friction of crack lips is obtained with the use of the finite-element method. The methods aimed at the construction of the kinetic diagrams of fatigue fracture under the conditions of transverse shear are developed and tested on specimens of 65G structural steel. We plot the kinetic diagram of fatigue fracture and approximate its middle segment by a linear dependence in the established parameters.