Khazin G. Research of mechanical models of process prefracture near to angular points in conditions of plane deformation

In conditions of plane deformation within the framework of a static symmetrical problem of a theory of elastic strength the researches of models of an incipient state of process of development of a prefracture zone near to an angular point of a homogeneous isotropic elastoplastic body being a stress raiser are conducted. Is rotined, that at definite boundary conditions in definite ranges of change of solution of a corner an angular point, from which one two straight lines of slips modelling initial plastic prefracture zone leave remains by a stress raiser, that is why instead of widely practiced now model with two slip lines, it is necessary to use other model of an initial zone prefracture. As this new model of an initial zone prefracture near to an angular point it is offered to use model "trident". According to this model, from an angular point two slip lines and more one line of a gap considerably of smaller length leave. On the basis of the precise solutions of new problems of a theory of elasticstrength for wedge-shaped bodies with cracks constructed by a method of Wiener-Hopf, in case of preservation of stress concentration the calculations of initial zones prefracture near to angular points are carried out within the framework of model "trident".