Kolpakov

One of the possible directions of development of high-speed particles counter space environment is the use of protective screens ( Whipple shields ) made ​​at some distance from the spacecraft out of mechanically active materialov.Fizichesky effect such protection is as follows. Introduction of hypervelocity particles in the active security elements leads to rapid phase change, resulting in increased pressure in the contact zone to a value of 1.2 ... 2.6 GPa. This leads to an increase in the damaging effects on the introduce particle its rapid destruction and more intensive radial spread elementov.V this paper we propose a physical-mathematical model of the phenomenon and the results of numerical modeling of shielding spacecraft from various mechanochemically active substances.

The articles concerns the constructional ceramics (CC) diagnostics based on the aluminum oxide. Relevance of the article subject of is caused by the need to have in a technical arsenal of the technologist methods of express-diagnostics, which can be applied at the stage of technological preparation of CC production. Their absence, today, considerably complicates the fine-tuning technology and prohibits from obtaining the latest information about operational dynamic properties of this material. The article presents the comparison results of the micromorpholodgy analysis of KK chips after static and dynamic influence. It analyses the obtained results and draws conclusions on a possibility to use an ultrajet diagnostics method at the stage of production in addition to tests using the solid-state drummers. The article gives justification for efficiency of ultrajet diagnostics methods, considers the prospects of its practical application in manufacturing products from KK.

This work is a continuation of studies on an important issue of galvanic production that is providing water and recovery of valuable chemical compounds based on a design concept of a proposed operation module with a countercurrent movement of a fluid in a distributed flushing system. The article provides results of numerical calculations of the primary process and repeated jet-dynamic flushing of blind holes filled with liquid pollution by short liquid jets. In order to ensure an effective removal of contaminants, the method was justified for cross-feed of details relating to multi-nozzle heads.

The authors consider the problem which describes high-speed interaction of an inert compact striker with various kinds of obstacles, including combined type barriers. The purpose of the study is, with the aid of mathematical modeling, to find out, what types of obstacles are capable of withstanding high-speed blow. They can be used as armor elements in personal body armor. Mathematical modeling of the process was done in Ansys 12.1 IDE. During the modeling of a high-speed interaction process a continuum mechanics device in two-dimensional axisymmetric setting was used. The authors developed and tested the mathematical model and drew conclusions concerning applicability of the armor elements.

Physico-mathematical statement of the problem of performance of explosive devices of different purposes, the fundamentals of numerical method for solving of this problem and description of algorithm for its implementation were considered in this article. Various examples of calculations were compared with experimental data; the possibilities of developed numerical technique were demonstrated.