In the paper the mixed boundary value problem of antiplane vibrations is considered in the elastic wedge-shaped medium containing the radiating defect J2. Radiating generators are assumed to be located on defect boundaries and on the interval J1 of the wedge free boundary as well. The problem of reconstructing the wave field in the whole wedgeshaped region with its boundary is stated. A number of problems of analyzing acoustic emission signals by radiating defect are reduced to the problem considered in connections with using non-destructive testing elements of the technological equipment under exploitation. The problem in question is reduced to studying the solvability problems of the equivalent boundary integral equation system both for stress saltus on the defect J2and contact stresses on the interval J1 of the upper plane of the wedge.
The reported study presents an asymptotic series solution to a system of differential equations in powers of a small parameter K depending on melting and a mechanical energy dissipation rate. Further, a self-similar solution has been found, as a consequence, a profile of velocities, pressure, principal operational characteristics, load capability, and friction force have been determined for a partially grease-filled working gap.
The paper presents the results of solving the problem of choosing a cutting tool with coatings for the given conditions of its subsequent operation using the capabilities of computer modeling of the architecture of coatings of hard-alloy tool materials. The results of the predictive tool material design for the specified operating conditions with a high degree of reliability allow us to evaluate the performance of tool materials in actual operating conditions. The developed computer models of cutting tools multilayer coatings are adequate, and the results of the calculations correspond to the experimental data obtained under the specified operating conditions of the tools. The novelty of the proposed approach consists in the development of the methodological foundations for the design of multilayer coatings of tools based on the analysis of computer simulation results of its stress-strain state during the cutting process.
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