Features of Sealing a Pipeline with an Elastic-Plastic Medium

The problem posed in the work is solved based on theoretical and experimental studies conducted in laboratory and industrial conditions. In the work on optimization of the modes of surface reinforcement of porous substrates by plastic deformation, mechanical, mathematical and statistical methods of processing the obtained data using computer technology were used. The reliability of the obtained results is confirmed by experimental studies conducted using modern equipment, measuring instruments, devices and consumables. A plastic model of a porous body is proposed, based on the concept of viscous stresses and root-mean-square strain rates, which has the following properties: a) there is a loading surface; b) there is a yield surface; c) the stress potential coincides with the load; d) the dissipative function has the first order of homogeneity in terms of the components of strain rates. The study of the kinematic parameters of a porous substrate as an integral medium includes the concepts of macro- and microdeformation, which makes it possible to determine its deformed state and differentiate the deformation of particles and pores of the material. The physical, mechanical and tribological characteristics of the porous solution are determined taking into account the parameters of the surface reinforcement of the porous solution by plastic deformation and the strain hardening of the base material. A mutual relationship has been established between them.