Compaction of porous powder body consisting of the elasticplastic medium
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 6, Issue 7
Abstract
<p>In the development of technological processes of producing cold-pressed sintered parts of low porosity, special attention is paid to the mechanism of density variation. In powder metallurgy, a multicomponent charge consisting of plastic metals, as well as poorly compressible inclusions and compounds, is often used. Such charge can equally be attributed to the charge consisting of iron powder, cast iron and glass. In this charge, the first component (base) is ductile iron, and the other two, cast iron and glass, are elastic components. It is of some interest what kind of compaction can be obtained in this case and what resulting equations can be used to estimate the mechanics of compaction of such a powder charge.</p><p>The resulting equations of compaction of porous powder bodies of iron-cast iron-glass are proposed. The analysis of the isotropic, rigid-plastic hardening material such as iron-cast iron-glass is given. When compacting such a material, the rate of energy dissipation (pressing pressure) is determined by the rate of volume and form change of the body. It is shown that the difference between compressed (cast iron and glass) and plastic compacted (iron) materials forms special mechanical properties of the matrix. Consequently, hydrostatic pressure can affect the form change of the body, and shear stresses – volume change. The results of the mathematical approach to obtaining the resulting equations of compaction of the elastic-plastic medium showed the way to build a theory of plasticity of the compacted body, which eliminates the need to take into account the type of loading surface. When accounting the loading surface, it is impossible to obtain universal equations of compaction of the porous elastic-plastic medium. It is shown that to apply the classical formulation of the model of the elastic-plastic compacted body, it is necessary to assume that the loading surface is convex-closed</p>
Authors and Affiliations
Tahir Jabbarov
Keywords
Related Articles
- EP ID EP528293
- DOI 10.15587/1729-4061.2018.149683
- Views 43
- Downloads 0
Definition of the influence of obtaining method on physical and chemical characteristics of Ni (OH)2 powders
<p class="1">Four types of hydroxide were chosen for the study. Two of them were synthesized using the industrial method and are used in alkaline batteries. The other two nickel hydroxide powders were synthesized accordi...
Developing and programming the algorithm of refinement of the crystal structure of materials with possible isomorphous substitution
In general, the software for analyzing data using the X-ray diffraction method does not include the possibility for using stoichiometric principles between chemical elements and the relations between the occupation of cr...
Investigation of the change in the strength properties of a soil mass by mechanical sensing
<p>Determination of depth distribution of strength characteristics and comparison with analytically determined values allows obtaining data on the depth of various morphological horizons, the presence of voids and inclus...
Studying the computational resource demands of mathematical models for moving surface eddy current probes for synthesis problems
<p>Distribution of eddy current density for three types of coils of excitation of moving surface eddy current probes, in particular circular, rectangular, orthogonal-rectangular shapes was calculated according to the for...
Experimental study into the influence of straw content in fuel on parameters of generator gas
<p>A gasifier of specific design was proposed for gasification of straw containing fuels. Combustion and regeneration zones of this gasifier have the same diameter. A mixture of wood and straw pellets was used as a fuel....