bluuebunny/crossref_metadata_2025_split huggingface dataset:
Disadvantages of the selective laser sintering technology in the manufacture models for investment casting
Authors: Dementyeva J N , Kashapov R N , Kashapov N F , Kashapov L N 
Published: August 2019

Annotation
Preparation of production and development of new science-intensive products is a complex and time-consuming process, including the creation of product models for carrying out a series of experimental studies to refine computational models, and then manufacturing the necessary technological equipment. The use of digital production technologies can reduce the laboriousness of this process. The technology of selective laser sintering eliminates the need for the design and manufacture of casting equipment. This paper presents an analysis of the difficulties encountered when using the SLS process for the manufacture of polystyrene smelted models.
Mathematical modeling of heat treatment of three-layered material
Authors: Fedyaev V L , Khaliulin V I , Belyaev A V , Faskhutdinov M Kh 
Published: August 2019

Abstract
The paper presents mathematical models of the thermal behavior of the three-layered material in the presence of a thin air gap between the two of them. Both convective and radiative-convective heat transfers with the environment are considered. As a result of an acceptance of a set of assumptions, the relationships to estimate the change of the material temperature in the layers over time were found for each of these cases.
Technologies for producing heat-conducting carbon foams by method of pitches carbonization under pressure
Authors: Galimov E R , Sharafutdinova E E , Galimova N Ya , Murataev F I , Samoylov V M , Danilov E A 
Published: August 2019

Abstract
Technology for producing syntactic carbon foams by the method of pitches carbonization under pressure is proposed. The components and optimal regime parameters for producing the foams with given thermophysical and strength characteristics are determined. The foams structure was studied using scanning electron microscopy.
Improving the efficiency of shaving through the use of wear-resistant coatings
Authors: Gilman V N , Balabanov I P , Faskhutdinov A I 
Published: August 2019

Abstract
The influence of the preparation and use of various types of wear-resistant coatings on the tool shaver of high-speed steel R6M5K5 with a hardness of 60-65HRc for shavinging parts such as gear driven made of steel 20HGNMTA with a hardness of 160-210 HB. The use of hydroabrasive cleaning with ceramic balls made it possible to obtain a clean surface with a rounding of the cutting edge to 7 microns. For the analysis of durability, coatings based on titanium nitride (TiN) and a multi-component coating of titanium and aluminum (AlTiN) were used. The coating on the basis of titanium nitride (TiN) increased the resistance 1.35 times. Multi-component coating of titanium and aluminum (AlTiN) increased resistance 1.61 (AlTiN) times.
Use of modified molecular sieves in mechanical filters
Authors: Karataev O R , Novikov V F , Karataeva E S , Kartashova A A 
Published: August 2019

Abstract
This article discusses the use of modified molecular sieves in mechanical filters of water treatment plants and the separation of the gas mixture, as they have sorbing properties to all heavy metals. The main indicators of the quality of separation is the adsorption isotherm, which demonstrates the structure of the adsorbent, the thermal effect of separation and a number of other physical,chemical and technological characteristics. System analysis of technological parameters of mechanical filters increases the operational period of equipment.
Development of turning-filtering mechanismof centrifuges
Authors: Karataeva E S , Lashkov V A , Brodt A A , Akhlyamov M N 
Published: August 2019

Abstract
Analysis of the literature revealed a lack of filtering centrifuges, which include the difficulty of regenerating the filtering surface. The presented constructive solutions for its elimination provide only local, but not complete regeneration of the filtering surface. The authors investigated the regeneration of filter elements when the blades rotate around the axis as a result of the engagement of parts of the rotary device. In order to exclude shock loads in the process of turning, various cam designs are considered, the best of which is a fork cam.
Automation of process of manufacturing products from a mixture of fluids fast polymerized in air using the jet centrifugal method
Authors: Karikh F G , Shafigullin L N 
Published: August 2019

Abstract
The developed method provides the extraction of each component from the transported agents into flexible vessels followed by blending in a dosing unit, mixing in a static mixer, spraying the mixture on the surface of ellipsoidal drums, while ensuring the required thickness of the gel coating transported to the line of formation.
Description of a complex technical system of urban electric transport from the standpoint of synergistic methodology
Authors: Kashapov N F , Sabitov L S , Auhadeev A E , Litvienko R S , Gatiyatov I Z 
Published: August 2019

Abstract
City electric transport is considered from the standpoint of a synergistic methodology in order to search for modern approaches to solving the actual problem of increasing its efficiency. The properties of the urban electric transport system are identified in their unity and interdependence in terms of synergetics. Methodological interpretations of these properties from the standpoint of an actually existing system of urban electric transport will allow determining its theoretical synergetic model.
Consideration of the influence of the reliability of elements of the urban electric transport system on its bandwidth
Authors: Kashapov N F , Sabitov L S , Litvinenko R S , Auhadeev A E , Pavlov P P 
Published: August 2019

Abstract
The article proposes an approach to assessing the capacity of urban electric transport, which is one of the criteria for a stable resource supply of electric traction, taking into account the reliability of the elements of its infrastructure. By introducing the operational readiness factor as an indicator of reliability, the researcher has the opportunity to assess the impact of failures of these components on the efficiency of the electric traction process, as well as to compare the compliance of the transport line infrastructure with the characteristics of the rolling stock used.
The effect of tillage with various tools on its agrophysical and agrochemical properties
Authors: Kashapov N F , Nafikov M M , Nigmatzyanov A R , Medvedev V V 
Published: August 2019

Abstract
When analyzing agricultural equipment for tillage and technology, it is observed that despite the introduction of conservation farming technologies (zero, ridge, strip and other methods of tillage), the mechanical method remains prevailing, taking into account the diversity of soil conditions in various soils. - climatic zones of the Russian Federation, the presence of plain, slope and contour farming, the need to combat erosion and preserve its agrophysical and agrochemical properties.
Influence of application of robotic systems on prospects and directions of development of electroerosive processings
Authors: Khafizov I I , Nurullin I G , Kashapov N F 
Published: August 2019

Abstract
Application of robotization in production is necessary for achievement of the required quality of products. Use of the industrial robot gives an unlimited range of opportunities on processings of preparations. The robotic system can be applied without readjustment to auxiliary operations.
Operation of brushes with increased service life on traction machines of electric vehicles
Authors: Khusnutdinov A N , Khusnutdinova E M , Butakov B M 
Published: August 2019

Abstract
The paper describes how to use a split brush with increased service life. Serial brushes were compared with those proposed by design, reliability and cost characteristics. The authors propose a method of how to improve the design of serial brushes and demonstrate a dynamic performance curve.
The study of the insulating properties of a new material based on straw and isoprene rubber C-nitrous vulcanization
Authors: Klyuchnikov O R , Martianov N A , Kiyamov I K , Sabitov L S , Morozov D A , Gilmanshin I R 
Published: August 2019

Abstract
Research has been carried out on the thermal insulation properties of a new composite material based on straw and synthetic rubber of low-temperature vulcanization. The values of heat transfer resistance (Rcp) and thermal conductivity coefficient (λ) are determined depending on the humidity of the environment.
Comparative analysis of friction losses in long pipelines with profiled channel flow area
Authors: Konakhina I A , Khusnutdinova E M , Khamidullina G R , Vachagina E K 
Published: August 2019

Abstract
The paper discusses the matter of how friction losses change in long pipelines with profiled channel flow area and describes the method of calculating the reduction of friction losses. The reduction of friction losses in the pipeline components has been analyzed.
Engineering education in the system of modern innovation
Authors: Konakhina I A , Khamidullina G R , Khusnutdinova E M , Kashapov N F 
Published: August 2019

Abstract
The paper discusses and reviews key issues of engineering education development as one of the most important component of modern innovative activity in the Russian Federation. The discussion is based on the example of modern educational technologies used in the Institute of Engineering at Kazan Federal University.
Modifying surface properties of polyamide powders for selective laser sintering
Authors: Lyakhovich A M , Kashapov R N , Kashapov N F , Kashapov L N 
Published: August 2019

Annotation
The purpose of this work was determination of the changes in surface properties of Polyamide-12 powder used in Selective Laser Sintering (SLS). The powders of original polyamide Duraform PAtm (3D Systems) were investigated. Also the powders remaining around the product after the sintering process were investigated. The difference in the chemical structure of the Polyamide-12 powder surface layers has been established. The reason is the increased content of oxygen-containing groups in the surface layers. To a greater extent, this difference was revealed for powders left after sintering and intended for reuse. Aliphatic chains are subject to oxidative degradation in the surface layers of the original powder. In the powder remaining after sintering, terminal carbonyl and amine groups are subject to oxidative degradation.
Modified gypsum-cement-pozzolanic composites reinforced with polypropylene fibers
Authors: Mukhametrakhimov R Kh , Galautdinov A R , Gilmanshin I R 
Published: August 2019

Abstract
The paper shows the effectiveness of the use of a polyfunctional complex modifier for a gypsum-cement-pozzolanic binder (GCPB), which allows reducing the water requirement of the mixture by 35%, increasing the flexural strength of gypsum-cement-pozzolanic composites (GPPC) by 28%, and 25% for compression. The results of experimental studies of the effect of polypropylene fibers on the basic physicomechanical properties of a central processing center are presented. The performed studies have shown high efficiency of polypropylene fibers of the type VSM-II-6 for dispersed reinforcement of the central industrial park. The maximum increases in the values of the flexural strength (by 41.2%) and compression (by 20%) are achieved with their volume content in the amount of 1%. It should be noted that the introduction of the studied fibers with a length of more than 6 mm did not lead to the expected result, which is due to the formation of a heterogeneous structure of the GPPC
Ranking materials technologies by limiting characteristics of heat-resistant alloys and their longevity in the problems of import substitution
Authors: Murataev F I , Galimov E R , Galimova N Ya 
Published: August 2019

Abstract
The structural strength properties determined by the true stress-deformation diagram and the fatigue characteristics of materials at combined action (tension and bending) under the conditions of temperature change are used to substantiate materials and technologies. The domestic alloy is suggested as an alternative to imported heat-resistant alloy IN-738LC used to manufacture the turbine rotor blades of stationary gas turbine plants (GTP). Expressions to determine the fatigue characteristics according to the criteria of structure stability are presented.
Substantiation of domestic material and welding technology for improving properties and competitiveness of pyrolysis furnace coils
Authors: Murataev F I , Galimov E R , Galimova N Ya 
Published: August 2019

Abstract
An alloy of cast pipes produced in the Russian Federation and a welding method for restoring coil sections made of imported pipes damaged by gas corrosion in pyrolysis furnaces are proposed. Substantiation of the alloy choice is carried out according to the research results of composition and structure of the metal of the original pipes and according to the criteria of structural strength using a proven diagram of controlled damageability. Recommendations for optimizing the composition, microalloying, and structure of the proposed alloy of thick-walled cast pipes for the elimination of the deficiencies identified by the research are presented. The alloy advantages by mechanical properties in the temperature range up to 800…890°C are shown on samples of an experimental cast pipe.
Improving the quality of castings made of non-ferrous metal alloys when casting in metal molds
Authors: Pankratov D L , Gavariev R V 
Published: August 2019

Abstract
The article deals with the quality of castings of zinc and aluminum alloys made by means of casting under pressure. The study identifies causes of defects in the outer surface and their influence on the roughness of the castings. The connection between the working surface of the mold and the roughness of the obtained castings is determined. The relationship between operation life of molds and the roughness of the castings is shown. The solution which increases the operational stability of molds as well as the quality of the surface of castings is proposed.
Investigation and explanation of mathematical tooling for accounting non-economic characteristics during the investment project effectiveness’ assessing process
Authors: Puryaev A S , Puryaeva Zh A , Kharisova A R , Puryaev A A 
Published: August 2019

Abstract
In this work we briefly present the study results of the issue of accounting and implementation of specific mathematical tooling for non-economic characteristics in evaluating of projects’ effectiveness. There is established classification of events in which using of one or another mathematical apparatus during solving the question of accounting for non-economic characteristics can be observed. It is proposed to study the classification of non-economic characteristics easily formalized and difficult to formalize (parameters) that are used when assessing the effectiveness of projects. There is explained and recommended a certain mathematical tooling for the process of accounting for non-economic characteristics in the assessment on the basis of classification under description.
To determination of dependence of parameters of surface cracks in concrete and reinforced concrete volume elements
Authors: Radaikin O V , Sabitov L S , KIyamov I K , Kashapov N F 
Published: August 2019

Abstract
To determine the dependences of the parameters of surface non-through cracks, the problem of tensile bulk concrete elements (in the form of prisms) was considered. One group of elements contained a crack normal to tensile forces, and the other was inclined (the problem was modeled using the finite element method in the Ansys software package). The stress intensity factors of three types were determined, for which a macro (subroutine) was written in the APDL language, the calculated coefficients of the 2nd and 3rd type (KI, KII) were used for the first time in the considered problems. On the basis of these coefficients, relations between the length, width of the opening, the penetration of cracks are established, the boundaries of the pre-fracture zone are found, and the residual bearing capacity of the elements with a crack is estimated. It is shown that the stress relief area around the crack has a diamond shape. The dependences obtained and the procedure for obtaining the numerical values of KI abd KII constitute a scientific novelty.
To estimate the rigidity of bending reinforced concrete elements based on dependence of length macro trays from load
Authors: Radaikin O V , Sharafutdinov L A , Sabitov L S , Strelkov Yu M , Kashapov N F 
Published: August 2019

Abstract
The purpose of this work is to make proposals for calculating the stiffness of normal sections of bending reinforced concrete elements, taking into account the work of the stretched concrete above the macrocrack and stress concentration at its top. In the article, such an account is made by the methods of fracture mechanics using the stress intensity factor KI
. One of the stages of calculation consists in the finite-element modeling of macrocracks in ANSYS.
To determination of dependence of parameters of surface cracks in concrete and low-armed wall panels
Authors: Radaikin O V , Sabitov L S , Kiyamov I K , Kashapov N F 
Published: August 2019

Abstract
The dependences between the parameters of non-through normal cracks in the wall “perpendicular plates” panel method were established. The residual carrying capacity of the panel and the size of the pre-fracture zone at the crack tip were determined. The dependences obtained and the proposed method for calculating wall panels constitute a scientific novelty.
Bevel gears monitoring methods developmentin the total contact patch terms
Authors: Safarov D T , Kondrashov A G 
Published: August 2019

Abstract
The article describes the main provisions of the method, which allows to perform the control of the gear rims of bevel gears according to the shape and relative position of the total contact patch. In comparison with the standard, the developed method allows to evaluate the conformity of the teeth of the ring gear with its considerable displacements relative to the calculated point of the gear transmission.
Four-point technique development for measuring spherical surfaces of machine parts
Authors: Safarov D T , Kondrashov A G , Khafizov I I 
Published: August 2019

Abstract
The article presents the theoretical foundations of the four-point measurements of spherical surfaces of parts method, allowing to increase the efficiency of spherical structural elements of ball tips of various sizes control. Compared to the measurement method on the coordinate measuring machine, the developed technique can be used at workplaces of forming spherical elements. The technique ensures the efficiency of measurements and increases the efficiency of carrying out the cutting tool settings.
Promising methods for enhancing the performance of boiler plants of centralized, decentralized and individual type of heat supply
Authors: Safin T R , Konakhina I A , Khamidullina G R 
Published: August 2019

Abstract
The paper covers the methods of how to enhance boiler plants for centralized, decentralized and individual type of heat supply. The performance analysis uses technical and economic efficiency indicators, fuel and other types of energy resources saving.
Changes in the CoCr alloys surface relief during plasma electrolytic treatment
Authors: Saleeva L R , Kashapov R N , Kashapov L N , Kashapov N F 
Published: August 2019

Abstract
Development of dentistry is strongly correlated with the new treatment method development and construction of metal, polymer and ceramic materials. Metal-ceramic crown is a common dental prosthesis. The aim of work was determination the causes of the ceramic coating spalling from the cobalt chrome metal frame. It is proposed to replace the standard sandblasting method to plasma electrolytic treatment. The burning of single microdischarges occurs during plasma-electrolytic process. The formation of the microwells and increasing surface roughness observed in cathode mode. This is due to local melting of the surface. The treated surface does not contain impurity elements that can cause the formation of microcracks.
Development of a polymeric fuel tank with high barrier properties
Authors: Shafigullin L N , Sotnikov A M , Romanova N V , Shabaeva E S , Sarimov D R 
Published: August 2019

Abstract
The choice and justification of the polymeric material is made for the fuel tank. It is established a possibility of linear polyethylene application with technology of fluoration as material for production of the fuel tanks with high barrier properties, that is with low permeability in relation to hydrocarbons. The main technological operations for the production of plastic fuel tanks carried out by rotational molding are described.
Quantum chemical calculations of the vibrational spectrum of aliphatic nitro compounds. Cluster analysis of torsion oscillations
Authors: Shaikhullina R M , Hrapkovsky G M , Shaikhullina M M 
Published: August 2019

Abstract
The data of theoretical analysis of vibrational spectra in the long-wave range of different isomers of methyl nitrite, methyl, ethyl, n-propyl nitrate, as well as the electron density distribution obtained within the B3LYP Density Functional Theory method with the 6 - 31G(d) basis set are presented. The cluster analysis of charge distribution on carbon, oxygen, nitrogen atoms and torsion oscillation frequencies in the range of 10-400 cm-1 is carried out.
Revisiting the calculations techniques of the optimal planning methods for the local authority activities (on the Republic of Tatarstan example)
Authors: Shikhalev A M , Akhmetova I A , Vorontsov D P , Khananova A F 
Published: August 2019

Abstract
The indicators of Savrushinsky local municipal structures development in the Republic of Tatarstan (RT) are defined on the basis of creation, receiving and the analysis of the production function (PF). For the PF creation were collected the input statistical data for 2013 - 2017 on revenues of the studied local municipal district, fixed assets volumes and the staff number. After the logarithmation and receiving the simple multiple regression equation with the potentiation method was received the PF in a multiplicative look that allowed to estimate the degree of intensive and extensive development of the studied municipal structures and also to define its ratio. For the mathematically correct results obtaining beforehand was made the component analysis of future equation, and after its receiving was estimated the residuals autocorrelation existence. As a result was specified that the Savrushinsky local municipal office in the studied period was mostly developed due to the production efficiency increase, than from the production scale growth in which increase consists the positive experience of this municipal structures.
Highly effective composite materials based on waste of technogenic sulfur
Authors: Yusupova A A , Barayeva L R , Akhmetova R T , Khatsrinov A I , Bobryshev A A 
Published: August 2019

Abstract
The materials developed on the basis of technogenic sulfur of silicate and chloride zinc of akivator can be used as road materials (tiles, paving stones) for arranging the territory or inner rooms of enterprises for the machine-building complex in areas with aggressive media. X-ray, rheological and quantum chemical studies have shown that when sulfur interacts with zinc chloride, a system of strong thermodynamically stable compounds is formed, causing the formation of an effective material.