bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical simulation of the stability of three-dimensional elastic composite structures based on the finite element method
Authors: Dimitrienko Yu I , Bogdanov I O 
Published: October 2020

Abstract
A numerical method for solving the problem of the stability theory of linearly elastic bodies with small deformations in a general three-dimensional formulation is considered. The problems of this class are poorly studied in contrast to the two-dimensional problems of stability theory. At the same time, classical approaches do not allow one to take into account the effect on the structural stability of various three-dimensional effects: areas of compounds, zones of defects, etc. The study formulates a variation formulation of the problem of the three-dimensional stability theory. Based on the finite element method, a numerical statement is obtained in the form of a generalized eigenvalue problem with symmetric global stiffness matrix. The application of the proposed method is demonstrated by the example of calculating the stability of a composite plate under longitudinal compression. The simulation was carried out using the SMCM software package developed at the Department of Calculus Mathematics and Mathematical Physics of Bauman Moscow State Technical University.
Universal models of the constitutive relations for transversely isotropic compressible composites with finite strains
Authors: Dimitrienko Yu I , Gubareva E A , Karimov S B , Kolzhanova D Yu 
Published: October 2020

Abstract
A model of a transversely isotropic compressible elastic medium with finite strains is proposed. The model belongs to the class of the so-called universal models, which are formulated in terms of energy (conjugated) pairs of stress and strain tensors - simultaneously for several types of pairs. An algorithm is proposed for calculating the constants included in the constitutive relations of this model, based on a comparative analysis of the results of calculating deformation diagrams under uniaxial loading according to this model and using the asymptotic averaging method. An example of numerical modeling for a layered composite is given.
Thermal Regulation of Space Platform Panels by Using Electric Heaters
Authors: Gorodetsky M A , Mikhaylovsky K V , Reznik S V 
Published: October 2020

Abstract
In orbital flight, the temperature state of spacecraft and their constituent space platforms complexly changes in time and space. The inhomogeneous temperature field of the space platform can cause shape distortion, which negatively affects the performance of targets. To equalize the temperature field of the space platform, it is proposed to use electric heaters with differentiated power distributions. The formulation of the boundary inverse heat conduction problem is presented and the specific power of the heaters necessary for uniform distribution of the temperature field of a panel of composite material is determined.
A study of physical and mechanical characteristics of polymer composite materials by ultrasonic technique
Authors: Chulkov D I , Terekhin A B , Dumansky A M 
Published: October 2020

Abstract
This work is concerned with the determining of physical and mechanical characteristics (dynamic elastic modulus along the direction of reinforcement, porosity, density, percentage of binder, strength) of fiberglass plastics by ultrasonic technique. The techniques, which are currently used for evaluation of the above-mentioned parameters of polymeric composite materials, are presented. The ultrasonic technique of physical and mechanical characteristics determining of glass fiber reinforced plastics for radio engineering purpose on the base of quarzitic, glass and siliceous fillers is proposed.
Comparison of low cost lasers for graphene oxide thin films reduction
Authors: Komarov I A , Struchkov N S , Polikarpova I A , Peretiyagin V G , Buyanov A D , Danilova E A , Denisenko E I , Onoprienko E A 
Published: October 2020

Abstract
In this work we made reduction of graphene oxide films with different low-cost lasers (near IR (1060 nm) and blue (445 nm) to investigate possibility of such films usage for flexible electronic and nanoelectronic applications. We successfully showed possibility of graphene oxide reduction with both types of laser but blue laser showed better uniformity of reduced graphene oxide film parameters including film morphology, resistance and Raman intensity ratios. We showed that reduction with near IR laser spills out into large nonuniformity of resistance with relatively high values. Thus the usability of commercially available laser facility for graphene oxide modification without adjusting control settings (on hardware and software levels) is poor. On the other hand, relatively laboratory device based on low-power blue laser showed much better usability an it’s perspective to future market of low-cost modification facilities for thin carbon-based films.
Estimation of the durability of polymer composites on a fabric basis, taking into account the influence of non-force factors
Authors: Kayumov R A , Suleymanov A M , Muhamedova I Z 
Published: October 2020

Abstract
We considered the problem of evaluating the durability of film-fabric material (FFCM). The models of phase deformation of a film-fabric composite material was developed which took into account nonlinear viscoelasticity, temperature changes, material aging, microdamage accumulation processes and photodestruction. We presented the composration as an inhomogeneous body. When choosing the structure of the defining relations, we used the experimental data obtained by the authors for the phases of FFCM. Based oite under considen the modification of the second Fick’s law, the kinetic law of propagation of the photodestruction parameter deep into the representative cell of FFCM was constructed. To conduct a qualitative analysis of the behavior of the composite material under study, we formulated the problem with some model constitutive relations and numerical experiments were performed.
High-speed induction heating during tensile strength testing of a composite material based on an inorganic binder at temperatures up to 1500 ° C
Authors: Klemazov K V , Yakushkin P Yu , Zabezhailov M O , Stepanov P A 
Published: October 2020

Abstract
High-speed induction heating was used during strength tests in an oxidizing atmosphere of a composite material based on an aluminum-chromophosphate binder. Induction heating allows heating modes close to those of aircraft operating modes, which avoids the appearance of crystalline phases such as Al(PO3)3, Cr2O3, which arise under conditions of slow heating under classical methods of strength testing at elevated temperatures.
Research of thermal control system for nanosatellite with carbon fiber reinforced plastic body
Authors: Yu Wang , Soe-Moe Zarni , Denisov O V , Denisova L V 
Published: October 2020

Abstract
One of the key problems in the design of nanosatellites is to provide a specified temperature range for the operation of electronic equipment. In structures of modern nanosatellites mainly used the elemental base of smartphones. To process a large amount of information, more advanced processors with high thermal power are required. The specified thermal mode of the on-board computer can be achieved using a remote heat removal system or by direct contact of the processor cover with the carbon fiber reinforced plastics (CFRP) body of the nanosatellite. Using a model of nanosatellite as an example, a thermal control system with miniature loop heat pipes and highly heat-conducting refrigerators-emitters is designed. The influence of the thermal conductivity coefficient in the reinforcement plane of the nanosatellite CFRP body on its temperature state in low Earth orbit is studied.
Optimization of the power structure of carbon-ceramic composite materials
Authors: Yu Taraskin N , Grigorieva V L 
Published: October 2020

Abstract
In this paper analyze of structures and materials for the heat shields of the descent vehicles is considered. In addition, the structure, manufacturing technology and characteristics of carbon-ceramic composite materials are analyzed. A basic finite-element model of a heat-shielding coating is based, and topological optimization is performed. Based on the results of optimization, the power structures of the heat-shielding coating are developed and their strength characteristics are evaluated. The general structure of the heat shield is developed including account the heat-shielding coating.
Biharmonic Problems and their Application in Engineering and Medicine
Authors: Matevossian H A , Nordo G , Sako T 
Published: October 2020

Abstract
In the present paper we study some properties of solutions of the Steklov and Neumann boundary value problems for the biharmonic equation. For solving these biharmonic problems with application in engineering and medicine, we need to solve boundary value problems Dirichlet and Cauchy for the Poisson equation using the scattering model. In order to select suitable solutions, we solve the Poisson equation with the corresponding boundary conditions Dirichlet and Cauchy, that is, some criterion function is minimized in the Sobolev norms. Under appropriate smoothness assumptions, these problems may be reformulated as boundary value problems for the biharmonic equation.
MSC: 35J15; 35J35; 35J40; 58J50; 58J90.
Environmental effectiveness assessment of the technology for molding products made of polymer composite materials using a reusable flexible punch
Authors: Novikov A D , Stoyanova M V , Borodulin A S 
Published: October 2020

Abstract
The use of composite materials in all industries has a negative impact on the environment in general and man in particular. Polymeric binders include hazardous substances, and the auxiliary components used in production are made of non-processed materials. It is possible to reduce the negative impact on the environment by using a new technology using reusable flexible punches.
Numerical simulation of the heat transfer process in the antiicing heating system for Arctic marine applications
Authors: Dimitrienko Yu I , Chibisov V Yu , Koryakov M N 
Published: October 2020

Abstract
In the Arctic, there is a serious problem of icing of structures, which can cause a catastrophic disruption of the functioning of the equipment necessary to maintain the life support of sea vessels and ground structures. For marine vessels, this problem is especially relevant in view of the limitations on heating systems and the mass of permissible heating equipment. The article is a continuation of work on the research and development of an electrical heating system for the air intake grilles of marine vessels. A numerical simulation of the heat transfer conditions for the design of the air intake grille with a built-in electric heating system was carried out. Some variant calculations of the numerical simulation of heat transfer processes in the system are presented — air, a streamlined structure — an air intake grill case — a heating system. A technique has been developed for selecting the optimal parameters of the electric heating system for various operating conditions of air intake grilles.
The use of fuzzy logic for the clean-up systems control for bunkers, containing bulk solids
Authors: Abramov A M , Yu Klyukin V , Kozhikin V V , Kochneva O V 
Published: October 2020

Abstract
The issues of eliminating the bulk solids overhanging in bunkers using pneumatic pulse devices are considered in the following article. An algorithm for automatic control of pneumatic collapse systems based on the use of fuzzy logic methods is proposed. A constructive solution for this algorithm is given, based on the assessment of the level of bulk material on the conveyor installed at the exit of the hopper. The Mamdani algorithm is used as a fuzzy inference algorithm. The fuzzy Logic Toolbox package of the MATLAB computing environment was used for modeling fuzzy systems. The use of mid-maximum and center-of-gravity methods as a defuzzification method is considered. It is demonstrated that the use of fuzzy logic makes it possible to significantly simplify the development of the control system algorithm.
Simulation of operation of a sequential hybrid drive of a haul truck with a traction battery and a bilateral DC-to-DC converter
Authors: Buzunov N V , Pirozhkov R D , Kartashov A B , Dubinkin D M , Efremenkov A B 
Published: October 2020

Abstract
In this article we consider one of the possible options for organizing the traction drive of a haul truck. The used scheme of the drive organization is given, and its performance is estimated by means of the drive simulation. The consideration is given to DC-to-DC converters in drives of hybrid traction systems. The conclusion is made about their influence on the efficiency of the hybrid traction drive.
Hybrid technology for the synthesis of ultrafine carbon powder material in an amorphous state
Authors: Chaika V A , Savin V V , Zherebcov I S , Boiko M E , Boiko A M 
Published: October 2020

Abstract
The results of using a hybrid technology for the synthesis of ultrafine carbon powder material in an amorphous state are considered. Different modes of hybrid technology are proposed, including mechanochemical synthesis in a ball mill and the process of self-propagating sustainable combustion in a natural atmosphere to produce carbon powder materials (CPM) in an amorphous state. Using X-ray diffraction methods: diffractometric, radiographic, and small-angle X-ray scattering, heterogeneities of the CPM structure were studied. Areas of structural heterogeneity having a flat shape and containing up to 10 graphene-like layers are revealed.
Stability evaluation of cutting edges in operation of composite materials for instrumental purposes based on a metal matrix
Authors: Fedotov A A , Safonova M N , Syromyatnikova A S 
Published: October 2020

Abstract
The authors analyzed the existing methods for assessing the stability of cutting grains in the article. The most optimal method for assessing the performance of abrasive grains was selected based on the results of the analysis. This method was used to calculate the concentration of diamond grains on the working surfaces of samples of a composite material made on the basis of bronze. The results of the studies showed that when testing the samples for friction and wear, the number of active abrasive grains and the relative solids content of natural diamond grinding powders show the stability of the cutting edges.
Processing of steel galvanizing waste using the method of melt immersion
Authors: Gel V I , Sapozhkov S B 
Published: October 2020

Abstract
The article describes the methods of steel galvanizing waste processing by immersion in a zinc melt, furnaces and devices for processing hard zink and drosses into usable products for zink pots, the methods for zinc extraction from waste and their use in industry. It is demonstrated that the hot-dip galvanizing wastes is a serious resource in reducing the consumption of primary zinc, what is more their use does not entail deterioration in the quality of the hot-dip zinc coating. However, not all technologies and types of equipment for processing zinc-containing waste are equally effective. It is appropriate to use vibro-deburring closed machines for processing dross (liming), and furnace with a “roof” heated for processing hard zinc, and in the latter case, according to the technology of fractional loading of reagent – aluminum scrap – processing floating aluminum-iron intermetallic compounds carnallite-cryolite fluxing agent.
Improving the design of a disintegrator for deep utilization of enrichment tailings
Authors: Golik V I , Razoryonov Y I , Efremenkov A B 
Published: October 2020

Abstract
The article discusses the directions of improving the design of disintegrators for activating materials and leaching metals when disposing of solid mineral raw materials using mechanochemical technology. The results of experimental extraction of metals from non-ferrous and ferrous ores, as well as coal are presented. Disintegrator designs differing in the use of physicochemical methods of increasing activity are recommended.
Development of intelligent algorithms for the continuous diagnostics and condition monitoring subsystem of the equipment as part of the process control system of a stainless steel pipe production enterprise
Authors: Grishin E S 
Published: October 2020

Abstract
This article describes the process of development and implementation of an integrated APCS and continuous diagnostics and equipment condition monitoring subsystems using intelligent machine-learning-based algorithms for a stainless steel pipe manufacturing enterprise with combining local automatic control systems into a single information technology the system. Briefly, the author describes the technological equipment and the production cycle, its features, as well as its change as a result of the implementation of APCS. The software tools and their structure, the interaction of elements in the system, the main tasks solved with APCS and their impact on the quality of finished products are described. A feasibility study and justification of the application of PCS for this production are carried out.
Method for predicting the composition of the protective coating in MMA
Authors: Il’yaschenko D P , Zernin E A , Sapozhkov S B , Loskutov L G 
Published: October 2020

Abstract
This article presents the results of experimental studies to determine the optimal coating composition for MMA. The optimization is based on the idea of multi-factor planning, which allows us to disseminate the obtained results not only on welding processes, but also related technologies.
Structure formation and functional properties of thin-gauge tapes made of copper-based alloys obtained by melt spinning
Authors: Letenkov O V 
Published: October 2020

Abstract
The article presents evidence proving that the alloys of the CuZnAl system, unlike the CuAl (Ni, Mn) system, have a smaller contact area with the quenching disk. It is caused by the condensation of Zinc vapors from the melt on its quenching surface. In addition, it is shown that Bronze alloys, in comparison with Brasses, are preferable for obtaining tapes by spinning. The main patterns of changes in critical points and the value of the Shape Memory Effect (εSME), depending on the types of heat treatment are also analyzed in this paper. Exposure of the alloy to the mold setting temperature of T = 800÷850 °C is accompanied by grain growth, increase in critical points, and decrease in the value of Shape Memory Effect. In this regard, the holding time at the mold setting temperature should not exceed t = 3÷5 min.
Tensor characteristics of intrinsic scattering magnetic field as an effective tool for strength diagnostics of steel products
Authors: Malinin V G , Malinina N A , Malinin V V , Dimov A A , Malukhina O A 
Published: October 2020

Abstract
On the basis of the methods of structural-analytical mesomechanics, tensor characteristics of the intrinsic magnetic field of scattering are formulated, their experimental substantiation is given, and studies allowing performing the operational quality control of steel products of responsible use are given.
Heat transfer through a double-glazed window by convection
Authors: Maiorov V A 
Published: October 2020

Abstract
The formulation and method of solving the problem of convective heat transfer through a double-glazed window are presented. A description is given of the influence of the main parameters of the glass on the mechanism and quantitative characteristics of the process. The presence of the optimal thickness of the gas-filled chamber, at which its thermal resistance has a maximum value, is revealed. The possibilities of reducing convective heat losses through double-glazed windows by increasing the number of glasses and the use of low-heat-conducting gas filler are analyzed in detail. The main characteristics of the process of convective heat transfer for single and double chamber double-glazed windows with various gas fillers are given.
Results of testing the rationality of tool materials using the experimental method and the method of simulation modeling
Authors: Ya Mokritsky B , Sitamov E C , Belyakov V N , Zawadzki I M 
Published: October 2020

Abstract
Growing requirements for physical and mechanical characteristics and operational properties lead to the development of ever new structural materials, the range of which is constantly expanding. This complicates the selection of rational tool materials required for machine processing, which requires considerable time. Currently, there are no regulatory recommendations for such work, so there is a need for a quick and less costly choice. Experimental studies, trial and error methods are not suitable for this. Therefore, it is necessary in a universal way, in the use of a model of the cutting process, which has not yet been developed due to the complexity of the simultaneously occurring processes. The absence of such a model of the cutting process can be temporarily replaced by computer simulation modeling. This work presents such modeling in the Deform software environment as applied to process turning of corrosion-resistant specialized stainless steel.
Modifications of lightweight concrete for use in housing construction
Authors: Naumova O S 
Published: October 2020

Abstract
The article analyzes the types, methods and characteristics of lightweight concrete modification in order to improve their strength and other characteristics. To substantiate the relevance of the study, the specificity and importance of the use of lightweight concrete in housing construction was determined, the evolution of the use of lightweight concrete in the construction of buildings and structures for various purposes was studied, the main types and characteristic features of lightweight concrete types depending on their composition, specifics of the technology for their production, usage and subsequent operation of structures and elements were examined. The classification of lightweight concrete structure modifiers is developed; their influence on the properties of concrete mixtures is studied.
Design hydrodynamic analysis of cavitation in narrow channels of the open-pit dump truck’s hydraulic system
Authors: Panasenkov D A , Zaycev A P , Kartashov A B , Pikalov N A , Dubinkin D M , Efremenkov A B 
Published: October 2020

Abstract
The paper deals with the processes that occur when the hydraulic fluid flows in the channels of the hydraulic block of the brake drive of the open-pit dump truck. The main attention is paid to the phenomenon of cavitation caverns emergence and hydro-mechanical losses depending on the hydraulic fluid parameters and the geometric parameters of hydraulic channels. The SST-HL and SSG turbulence models are presented in this paper. The Rayleigh Plesset cavitation model built into the ANSYS CFX software package is also used.