Plastic deformation of the crack tip in failure of tungsten-cobalt hard alloys

Abstract

In real solids, the region of prefailure is usually surrounded by the zone; of the plastically deformed material. The magnitude and intensity of strains in the zone control the nature of failure. The energy, used for failure, consists of the energy dissipated in the plastic region and only small part of this energy is used for rupture of interatomic bombs. Thus, examination of the formation of the zone of plastic strains in the vicinity of the crack tip is of considerable importance for describing the process of failure and development of simulation assumptions on the limiting state of composite materials. In this work, the concept of linear fracture mechanics is used to carry out approximate analysis of the variation of the form and dimensions of the plastic zone of the crack tip situated in a cobalt interlayer, in tensile loading and transverse and longitudinal shear of tungsten-cobalt hard alloys. 12 refs., 4 figs.