численное моделирование

Modeling the Dynamics of Massless Charge Carries is Two-Dimensional System

Authors: Levenets S. A., Verevin T. T., Makhankov A. V., Panferov A. D., Pirogov S. O.

The paper presents the results obtained in the process of developing a system for simulating the generation of massless charge carriers with a photon-like spectrum by an external electric field for two-dimensional media. The basis of the system is a physical model of the process, built in the formalism of a kinetic equation for an adequate quantum-field theory. It does not use simplifying assumptions, including expansions in some small parameters (perturbation theory). In this sense, the model used is accurate.

The Construction of the Deformation Diagrams of Metals and Alloys at Impact Compression of Tablet Specimens with Friction Forces Consideration

Authors: Bazhenov V. G., Osetrov D. L., Ryabov A. A.

The influence of friction forces on the dynamic deformation of elastoviscoplastic tablet specimens was numerically and experimentally investigated. The main dependencies of their shape changing for metals and alloys have been established. Acriterionof the shape chang in gof tablet specimen sisproposed.

Flow of Slibar–Paslay material in a flat channel

Authors: Okulov N. A.

The question of the numerical simulation of unstable flow of a viscoplastic material in a flat channel is considered. Defining relations are taken in the form of Slibar–Paslay. The problem is solved in stresses. Theorem about the weak discontinuity at the interfaces between rigid and viscoplastic zones is proved. The original numerical method for solving the problem is offered. Numerical simulation results are presented.