scholarly journals Численное моделирование термодинамических параметров высокопористой меди

2019 ◽  
Vol 89 (8) ◽  
pp. 1158
Author(s):  
К.К. Маевский ◽  
С.А. Кинеловский
Keyword(s):  
Experimental Data ◽  
Shock Wave ◽  
Equation Of State ◽  
Thermodynamic Parameters ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Thermodynamically Equilibrium ◽  
Consistent Equation ◽  
Modified Equation ◽  
Fitting Parameters

The modified equation of state is proposed for the calculation of thermodynamically equilibrium model TEС2 to improve the reliability of the description of thermodynamic parameters of shock-wave loading of pure materials and heterogeneous mixtures of different porosity. The parameters of the thermally consistent equation of state are determined for copper. A reliable description of the shock-wave loading of copper is obtained for a small number of fitting parameters determined by the experimental data. The thermodynamic parameters for copper of different porosity are modeled, the compression and temperature values along the shock adiabate are determined; the heat capacity value along the normal isobar is calculated. The results of calculations are compared with the known experimental results of different authors.

scholarly journals Численное моделирование поведения карбидов при высокоэнергетическом воздействии

2022 ◽  
Vol 92 (1) ◽  
pp. 100
Author(s):  
К.К. Маевский
Keyword(s):  
Experimental Data ◽  
Shock Wave ◽  
Thermodynamic Parameters ◽  
Experimental Results ◽  
Dynamic Loads ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Model Calculations ◽  
High Dynamic ◽  
Stoichiometric Ratios

The results of research on modeling thermodynamic parameters of shock-wave loading of carbides with different stoichiometric ratios are presented. The carbides are considered as a mixture of carbon with the corresponding component. The calculations of pressure, compression and temperature values under shock-wave loading for solid and porous carbides in the range of pressure values above 3 GPa are performed. The model calculations are compared with the known experimental results on the shock-wave loading of carbides with different porosity values. The possibility of modeling the behavior according to the proposed method for carbides for which there are no experimental data at high dynamic loads is shown.

scholarly journals Численное исследование ударно-волнового нагружения металлических композитов на базе W и WC

2021 ◽  
Vol 91 (5) ◽  
pp. 815
Author(s):  
К.К. Маевский
Keyword(s):  
Shock Wave ◽  
Tungsten Carbide ◽  
Equilibrium Model ◽  
Thermodynamic Characteristics ◽  
Refractory Materials ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Metal Composites ◽  
Thermodynamically Equilibrium ◽  
Selection Of

The results of research on modeling shock-wave loading of metal composites – elkonites, which are sintered refractory materials tungsten, tungsten carbide or molybdenum impregnated with fusible metal silver or copper using thermodynamically equilibrium model TEC are presented. The investigation of the compressibility of such composites are related to the properties of the materials themselves and the possibility of creating samples based on them. Thermodynamic characteristics are calculated for these metals and compared with available data of shock-wave experiments. The model allows us to describe the dynamic loading of solid and porous alloys of various compositions such as Cu–W, Ag–W, Cu–WC, Ag-W. This model allows for targeted selection of material compositions of different porosity values and ratios of their components in order to obtain the specified characteristics for shock-wave loading of samples.

scholarly journals Impact of shock-wave loading regimes on structural and elastic characteristics of a single-component abrasive tool

2019 ◽  
Vol 298 ◽  
pp. 00138
Author(s):  
Mariya Polyanchikova
Keyword(s):  
Experimental Data ◽  
Shock Wave ◽  
Calculated Data ◽  
Aluminium Oxide ◽  
Dependency Graph ◽  
Single Component ◽  
Abrasive Tool ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Elastic Characteristics

The article considers the issues of determining the elastic characteristics of a single-component abrasive tool depending on the porosity of the abrasive tool after pressing the abrasive compound studied; the method of determining the modulus of elongation and porosity based on theoretical and experimental data has been used; the dependency graph between the modulus of elongation and porosity, as well as experimental formulas reflecting these dependencies are presented. Based on the experimental and calculated data on the density, porosity and the size of the modulus of elongation, depending on the pressure of the shock wave during pressing and the initial aluminium oxide grains sizes, empirical dependences of elastic characteristics have been determined in order to predict the production of a single-component abrasive tool without a bond with predetermined properties.

scholarly journals Modeling of shock-wave loading of carbides as mixtures of components

2021 ◽  
Vol 2057 (1) ◽  
pp. 012115
Author(s):  
K K Maevskii
Keyword(s):  
Experimental Data ◽  
Shock Wave ◽  
Boron Carbide ◽  
Porous Materials ◽  
Numerical Experiments ◽  
Shock Wave Loading ◽  
Wave Loading ◽  
Complex Materials ◽  
Wide Range

Abstract The results of numerical experiments on the modeling of shock wave loading of solid and porous carbides with various stoichiometric compositions are presented. The model is based on the assumption that all the components of the mixture, including gas, have similar pressure, velocity and temperature. The model allows describing the behavior of porous materials and mixes in a wide range of porosity and pressures with precision of experiment. The behavior of complex materials such as carbides is considered as a mixture. The model accurately describes the behavior of the carbides with equal shares of the components of WC, TiC, TaC, NbC and the behavior of boron carbide B4C. Comparison for data of calculation and experimental data was held for carbides with different porosity.

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