Kinetics of plastic strain zone formation near crack tip in fracture of construction materials under plane stress and plane strain

X-ray-diffraction analysis is used to determine the depth of the plastic deformation zones in steel. 15Kh2MFA and alloy D16 beneath the surface of fractures that are obtained under plane stress (PS) and plane deformation (PD) conditions. We propose a scheme illustrating the kinetics of the formation of two plastic deformation zones near the crack tip under one-time loading in conditions of the plane stress state: a strongly deformed microzone and a weakly deformed macrozone.Translated from Problemy Prochnosti, No. 4, pp. 57–63, April, 1993.