bluuebunny/crossref_metadata_2025_split huggingface dataset:
Classifications of schematic solutions of the geokhod knife operating body and the interaction surface of the geokhod operating body with bottom rock
Authors: Aksenov V V , Efremenkov A B , Yu Sadovets V , Pashkov D A , Efremenkov V A 
Published: October 2020

Abstract
When developing geokhods, it is necessary to take into account the helical movement of the machine in the rock mass. In this regard, the substantiation of the technical and structural elements of the geokhod is relevant. The purpose of the work is to classify the schematic solutions of the geokhod knife operating body and the surface of interaction of the geokhod operating body with the bottom rock. As a result, schematic solutions were developed for the knife operating body of the geokhod and the surface of interaction of the geokhod operating body with the bottom rock, their classification is proposed.
Development of a methodology for modeling complex shaped geokhod operating body in SolidWorks
Authors: Aksenov V V , Efremenkov A B , Yu Sadovets V , Pashkov D A , Sadovets R V , Rezanova E V , Efremenkov V A 
Published: October 2020

Abstract
Modeling complex, curved surfaces of manufactured parts is an elaborate design task. The article discusses the development of a methodology for modeling a knife with a complex helicoid surface and a geokhod knife operating body in SolidWorks. The development of the modeling methodology presented in the article allows making constructive solutions not only for the knife-type operating body of any size, but for other types of geokhod operating bodies. In addition, the solid model of the operating body knife allows assessing the stress-strain state of the operating body elements.
Research areas of the scientific specialty “Geodynamics of underground machines”
Authors: Aksenov V V , Magazov S V , Khoreshok A A , Efremenkov A B , Yu Beglyakov V , Yu Sadovets V , Pashkov D A 
Published: October 2020

Abstract
At all stages of creating experimental models and prototypes of a new class of underground machines “Geokhod”, developers faced problems. At the design stage the problem was the lack of methods for determining the parameters of the main elements and systems of underground machines that interact with the geo-environment during their movement. At the production stage, they faced the problem of the lack of a methodology to ensure the accuracy and man-ufacturability of specific systems of underground machines. In addition, the problem of scientific and methodological “deficit” was present at the test stage. The development of systems of a new class of underground machines is constrained by the lack of special scientific and methodological support. When creating a new class of underground devices moving in the bowels of the Earth and using the geo-environment, there is an urgent need to study the effects of the geo-environ-ment on bodies moving in the geo-environment. In the aircraft industry there is a fundamental science that studies the forces arising on the surface of a solid body moving in the air - aerodynamics of aircrafts. Thus, by analogy with aircraft construction, studies of the effects of the geo-environment on bodies moving in the geo-environment should be assigned to a new scientific direction and the scientific specialty “Geodynamics of underground machines”. The article proposes a draft passport of the specialty and a field of research in the new direction “Geodynamics of underground machines”. This scientific direction is one of the basic elements of an emerging advanced technological structure for the development of the underground space, based on new approaches in construction geotechnology and geotechnics.
Mathematical modelling of the process of crest formation by the working body of the cultivator – dump type
Authors: Algazin D N , Kem A A , Shevchenko A P , Begunov M A , Koval V S 
Published: October 2020

Abstract
The results of theoretical studies of the cultivator - dump type ridger are presented. The analysis of the forces acting on the working body is carried out. An expression is obtained for determining the second consumption of soil mass transported by a working body. The rational parameters of the working body are determined.
Zirconia crystals for tribotechnical applications doped by rare earth elements
Authors: Alisin V V 
Published: October 2020

Abstract
The article discusses the impact of rare-earth microadditives on the mechanical properties of nanostructured zirconia crystals stabilized with yttrium oxide as applied to the friction units of devices. The mechanical properties of the surface layers were studied by the nondestructive method of kinetic microindentation. Compressive strength was determined by the standard destructive compression test method. Comparative tribological tests were carried out with dry sliding friction of the test samples on steel according to the disk-finger scheme. The effect of the ionic radius of the alloying element on the compressive strength is investigated. It was established that the doping of zirconia crystals is ambiguous, because it can improve and worsen the tribological properties of crystals. On the basis of the study, a comparison is made of the mechanical properties of crystals and ceramics used in the supports of the axis of precision instruments and areas that are promising for the use of zirconia crystals in instrumentation are identified.
Mechanics of inspection robot traveling over the electrical line with constant velocity
Authors: Bahrami M R 
Published: October 2020

Abstract
This article aims to the construction of mathematical models for a situation in which the electrical line stretched and supported by two isolators, one horizontal and the other vertical and robot inspector moves with a constant speed on it. The expansion theorem is used to construct the equation of motion of the system and has been solved by two methods: expansion method and Galerkin method. As a result of even constant speed of motion of robot inspector along the electrical line, vibrations have been observed. These vibrations can cause damage to the line or the robot structure as well. Then, the effect of the resistance force, wind force, has been studied. As shown in results, resistance force acts as a damper to the system and causes a decrease in the amplitude of vibrations. The practical results are useful for engineers to select proper parameters and speed for designing and constructing the robot inspectors.
Deformation-force effects of shape memory of TiNi alloys under conditions of incomplete martensitic transformation
Authors: Belyakov V N 
Published: October 2020

Abstract
The article is devoted to studying the influence of preliminary and plastic processing, applied stress, degree of phase transformation on the deformation effects manifested in conditions of incomplete martensitic transformation. The laws of generation and relaxation of reactive stresses were studied depending on the stiffness of the reaction, the magnitude of the preliminary deformation and the selected interval of heat changes. It is shown that the accumulation and return of deformation, the effect of generation and relaxation of reactive stresses in a narrow temperature range occurs only in structurally inhomogeneous objects, determined with the statistical spread of characteristic temperatures.
Simulating the pyrolysis process of sludge-lignin with the production of active carbons
Authors: Bogdanovich N I , Vorontsov K B , Labudin B C , Varenik K A 
Published: October 2020

Abstract
Using the method of the planned experiment, mathematical models that establish a relationship between the technological parameters of the pyrolysis process of sludge-lignin with the characteristics of a porous surface of the synthesized active carbons are obtained. The nature of the influence of temperature and duration of the pyrolysis, the dosage of activating agent on the yield of carbon, the volume and specific surface of the pores are determined. The optimal conditions for obtaining adsorbents from sludge-lignin are established; the specific BET surface area was about 2000 m2/g.
The effect of coagulation on the processes of growth and changes in the numerical concentration of carbon dioxide crystals
Authors: Danilov M M , Opicina O S , Arendatelev I G , Zawadzki I M 
Published: October 2020

Abstract
The process of phase transition to the solid state of carbon dioxide vapors contained in an expanding gas mixture stream consists of the formation of crystallization centers and subsequent growth of the crystals formed, due to an increase in the degree of supercooling of the stream. Crystals nucleate in certain sections of the flow part of the expanders and grow as they move in the flow. Therefore, crystals of carbon dioxide of various sizes can be found in each of certain sections. As a result of their interaction, coagulation, expressed as the adhesion of smaller crystals to larger ones, can occur. The influence of the coagulation process on the change in the number of smaller crystals and on the growth of larger ones is considered. Equations are given on the basis of which the calculations of the studied processes are made.
Mathematical modeling of seed dissemination with a colter drill across the planting acreage
Authors: Evchenko A V , Shevchenko A P , Begunov M A , Koval V S , Algazin D N 
Published: October 2020

Abstract
The article is devoted to the development of a mathematical model of seed dissemination process with a colter drill equipped with a discharge channel across the feeding area. This mathematical model makes it possible to determine the optimal technological and constructive parameters of the colter drill of the planter.
Physical and chemical cleaning of the surface of power metal optics for the purpose of increase in beam firmness
Authors: Filin S , Rogalin V , Kaplunov I , Satayev M 
Published: October 2020

Abstract
Features of the choice of solvents for the physical and chemical cleaning of power optical elements in accordance with the parametric solubility theory were investigated. When cleaning the surface from the model contaminant with halogenated hydrocarbons, visually observed white film of alkali and alkaline earth metal salts that are not soluble by this class of solvents and iridescent bands from the interaction of hydrocarbons with the metal remain on the surface. All this greatly impairs the optical properties of the surface. It was shown that, when using solvents, it is necessary to inhibit the interaction of halogenated hydrocarbons with mirrors by stabilizing solvents or by selecting the regimes for carrying out the physicochemical purification process, or by thereof combination.
Magnetoelectric and magnetostriction characteristics of symmetric three layered structures of nickel - lead zirconate titanate – nickel and permendure – lead zirconate titanate – permendure
Authors: Filippov D A , Laletsin V M , Poddubnaya N N , Galichyan A , Zhang Jitao , Srinivasan Gopalan 
Published: October 2020

Abstract
The magnetoelectric and magnetostriction characteristics of the symmetric three-layered structures are presented. The composite structures were formed like sandwich structures with a piezoelectric layer between two identical magnetostrictive layers using epoxy adhesive. An analytical expression for magnetoelectric voltage coefficient in terms of parameters for magnetostrictive and piezoelectric subsystems is presented. On the basis of this expression determination of magnetostriction characteristics via magnetoelectric response was offered. This procedure was tested for these three layered structures using the field dependences of the magnetoelectric response. The magnetostrictive characteristics obtained are in good agreement with results, obtained by other methods.
Use of antivibration gloves when working with a petrol brushcutter Husqvarna 525RX
Authors: Khlopkov E A , Smirnov V V , Bulateckii M V , Vyunenko Y N 
Published: October 2020

Abstract
With the onset of the season in large cities, extensive work begins on green spaces care. The article demonstrates the effect of using antivibration gloves on the level of acoustic impact on the of the Husqvarna 525RX brushcutter operator hands when mowing the lawn. The indicators are measured using the SVAN 948 vibration and sound velocity analyzer.
Features of microrelief formation during laser treatment of Cu-Cr-Zr alloy surface for diffusion welding
Authors: Khomich Yu , Malinskiy T , Rogalin V , Kaplunov I , Ivanova A 
Published: October 2020

Abstract
The effect of UV laser pulses of nanosecond duration on surface of Cu-Cr-Zr alloy samples was investigated. Noticeable changes in the morphology of the surface layer after irradiation were found at pre-threshold values of the energy density of ∼ 0.2 – 0.8 J/cm2. Changes are traces of thermoplastic deformation resulting from influence of a concentrated energy flow and appears in irregular elevation of the irradiated surface area of the sample by up to 1 μm and in some cases – more. A developed metal surface, deformation of the crystal structure of the surface layer can support the diffusion process during diffusion welding. For energy densities of the order of 1 J/cm2 or more, optical breakdown with the formation of a crater on the metal surface occurred. The mechanical impulse of a laser plasma when exposed to a metal surface prevents the thermomechanical expansion of the material, and the effect of raising the surface of the samples was not observed.
Using waste heat for heat supply and greating a single steam network with power generation due to pressure differences
Authors: Kondurov E P , Kruglikov P A , Shvetsov I V , Zhelnov D V 
Published: October 2020

Abstract
In modern economical conditions external heat suppliers often become quite expensive for a consumer enterprise due to their monopoly, so the task of reducing the amount of heat received from them to the minimum, and of using one’s own capabilities to the maximumarises. In this article, using a particular example, the authors considered certain technical characteristics of using waste process heat at the enterprise while transferring the enterprise’s heat supply system to its own heat sources, as well as creation of a single steam network with electricity production due to pressure differences.
Physical and chemical processes in the contact zone when processing metals with a blade tool
Authors: Latyshev V N , Naumov A G , Shvetsov I V 
Published: October 2020

Abstract
The article considers the theory of radical-chain mechanism of formation of lubricant films on tribos-connected metal surfaces when cutting metals. It is shown that chemically active particles formed by the destruction of molecules of lubricant and cooling technological means (LCTM) in the contact zone play a decisive role in the synthesis of lubricants. Mechanisms of formation of chemically active atoms, radicals and ions and factors influencing these processes are presented. It has been established that the main of them can include the temperatures that occur in the contact zone, exoelectrons issued by freshly opened metal surfaces, as well as the catalytic effect of the juvenile surfaces themselves. On this basis, various methods of pre-activation of LCTM are proposed in order to obtain the required quantity and type of chemically active particles.
Analysis of methods for calculating intra-channel boiling heat transfer in refrigerants
Authors: Malyshev A A , Malinina O S , Kouadio K F , Shvetsov I V 
Published: October 2020

Abstract
The paper analyzes and compares methods for calculating heat transfer during boiling of refrigerants in horizontal pipes, as well as works devoted to the study of two-phase flows in minichannels.
The main provisions of the comprehensive analysis method based on true phase parameters were formulated.
It was found that for all the values of the mass velocity, there is a significant discrepancy in the calculated data, while the method based on the comprehensive analysis provides the best agreement with the experiment.
The comprehensive method was tested in relation to the analysis of heat-hydrodynamic processes at boiling in minichannels.
Comparison of the calculation results using the method based on true phase parameters with the experimental data showed a good agreement.
Assessment results of the dependence of the processed surface quality on the applied tool material
Authors: Ya Mokritsky B , Sitamov E C , Arendatelev I G , Zawadzki I M 
Published: October 2020

Abstract
Prior studies of surface roughness generated by machining the cutting edge of the tool does not remove the need for additional studies under specific processing conditions, for example, turning a specialized corrosion resistant stainless steel grade 09H17N7U. There are no regulatory recommendations to ensure the necessary quality of detail in the roughness parameters for this steel (pre-existing are outdated). The scope of application of this steel is rapidly expanding due to its unique performance properties, physical and mechanical characteristics. The authors performed such a study in relation to turning with various tool materials.
Improving the efficiency of planing operations when processing large parts based on gas analysis
Authors: Nikulenkov O V 
Published: October 2020

Abstract
The paper presents a comprehensive study of the process of diffusion of impurities, the formation of gases and their mass transfer in the gas-air space of the treatment zone. In addition, the author discusses changes in the state of the cutting process, including the state of the cutting tool and the surfaces of the processed products. Accordingly, the main scientific result is the development of methods and means of controlling the processes of mechanical processing based on mathematical models. The use of such systems in automated production allows you to increase productivity and reduce processing costs by increasing the reliability of processing at higher cutting conditions, timely change of substandard tools, reducing product scrap and tool consumption. In addition, to increase the reliability of the processing systems by timely replacement of extremely worn or broken tools on a backup tool.
Strength of multiferroic layered structures in position sensor structures
Authors: Petrov R V , Sokolov O V , Bichurin M I , Petrova A R , Bozhkov S , Milenov I , Bozhkov P 
Published: October 2020

Abstract
The article is devoted to modeling and calculating the strength of multiferroic layered structures in the designs of position sensors used in various practical applications, including CPS sensors. Progress in the study of new multiferroic layered structures in which a giant magnetoelectric effect has been discovered has opened up completely new prospects for the design of position sensors. The studies carried out open up obvious prospects for creating economical and cheap sensors for use in CPS structures, as well as electric motors for determining angular positions and other automated systems. The strength test of magnetostrictive-piezoelectric two-layer structures metglas/PZT, metglas/(LiNbO3 cut Y+140°), metglas/GaAs was carried out in the bending mode of the magnetoelectric effect. It was found that in all cases the strength condition is satisfied with a very good margin. Thus, the reliability of position sensors with a magnetoelectric structure is fully ensured. The studies carried out open up obvious prospects for creating economical and cheap sensors for use in CPS structures, as well as electric motors for determining angular positions and other automated systems.
Dependence of the preliminary plastic deformation on the curves of chromium-nickel steel deformation
Authors: Popov V A 
Published: October 2020

Abstract
The test results of pre-deformed tubular samples at various values of preliminary deformation are presented. The article describes the chamber of the apparatus, which makes it possible to test tubular samples under conditions of plane and volumetric stress states. Curves built on test results of samples with different levels of preliminary plastic deformation are presented, as well as the test results of samples deformed by the ray α = 0.5. The experiments make it possible to determine the value of the ultimate uniform deformation after preliminary deformation or on the final segment of the multi-link loading path.
Assessment of the effectiveness of the regenerative suspension of a timber truck based on the results of simulation
Authors: Posmetev V I , Nikonov V O , Posmetev V V 
Published: October 2020

Abstract
The relevance of using various recuperative mechanisms in vehicle suspensions is justified in order to reduce fuel consumption and improve their environmental performance. The developed hydraulic drive scheme and a mathematical model of the movement of a forest car equipped with a suspension with a recuperative mechanism are presented. An assessment of the effectiveness of the regenerative suspension of a timber truck was carried out according to the results of simulation. Analytical dependences of the influence of time, speed and diameters of recuperative suspension hydraulic cylinders on the values of recuperative power under various conditions of movement of a forest car are obtained.
Prospects for the use of u-shaped welded pipes of steel a316l heat transfer assortment in chemical engineering
Authors: Savin V V , Lebedeva K N , Herelovich V V , Savina L A , Chaika V A 
Published: October 2020

Abstract
To expand the possibilities of using welded stainless steel pipes in chemical engineering, comprehensive studies of the experimental batch of straight-seam and U-shaped laser-welded tubes of A316L steel have been performed. The corrosion resistance, strength and structural-phase changes in the product material during austenization were studied: short-term annealing at 1000 °C. It is shown that longitudinal welded pipes have a high margin of ductility. This opens up prospects for their wide application for the production of bent assortment in the form of U-shaped products. It has been experimentally proved that heat treatment according to the regime of short-term austenization completely eliminates metal hardening, providing relaxation of its elastic stresses and the formation of the structural state necessary for technological redistribution of A316L steel. Heat treatment according to the mode of short-term austenization at a temperature of 1000–1050 °C for 1–5 minutes can be recommended as a mandatory technological operation that completes the metallurgical conversion of laser-welded stainless tubes of heat-exchange gauge.
Grounds and problem statement for software complex for photolithography optimization for minimization of losses in optical structures of photonic integrated circuits
Authors: Sharapov A A , Shamin E S , Skuratov I D , Gornev E S 
Published: October 2020

Abstract
The losses in optical components are the key obstacle in development of photonic integrated circuits (PIC). This makes the developers to include additional signal gain elements into the optical scheme. One of the major and optimizable factors of signal loss is the sidewall roughness of the optical components. After analysis of factors causing the line-edge roughness (LER), we developed the basic model of the roughness emerging process during forming of photolithography nanostructures. We proposed an approach to optimize the photolithography process in order to minimize the optical losses in fabricated optical structures. The software complex on the basis of this approach is currently under development.