INVESTIGATION OF THE VISCOUS CRACK DISTRIBUTION UNDER THE ACTION EXTERNAL LOADS

Investigation of the stage of propagation of viscous fracture by applying theoretical models for the formation of a zone of plastic deformation before the front of a growing crack. Procedure. Comparative analysis of the existing theoretical models for the formation of the zone of plastic deformation before the front of a growing crack with experimentally calculated parameters. Scientific novelty. It is shown that no theoretical model of the propagation of plastic deformation does not agree with the experimental data, is due to the fact that the specific structural state and the role of the landslide component of deformation are not taken into account. Practical significance. Improvement of existing models for calculating the resistance to fracture of welded metal structures, including critical applications.