ENERGY OF DEFORMATION OF AN ELASTIC BODY CONTAINING A MICROCRACK UNDER PRESSURE

摘要

We determine complex potentials and the corresponding stress-strain state of a body with dislocation crack under a given pressure acting in the crack. We find the geometric parameters of a cracklike dislocation cavity and deduce relations for finding the energy of the body containing a crack of this kind. On this basis, we establish the lengths of equilibrium and nonequilibrium cracks and determine the critical pressure of crack initiation.