bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computational analysis of triglyceride molecule involving in transesterification reaction
Authors: Srinivasan Gokul Raghavendra , Sharma Yashasvi , Vijayalakshmi S , Ranjitha J 
Published: October 2020

Abstract
This present study deals with the quantum computational analysis of palmitic-oleic-stearic acid based triglyceride molecule available in waste animal fat, which involves in transesterification reaction during biodiesel production. From stereospecific analysis, stearic acid, oleic acid and palmitic acid, and were found at SN1, SN2 and SN3 positions respectively. The proposed triglyceride model was developed using Gaussian 09 and computational analyses were carried out using Density functional theory (DFT) method. Based on geometric optimization, the average bond length between C-C bond, C=C bond, C-H bond, C-O bond and C=O bond was measured as 1.53Å, 1.33Å, 1.09Å, 1.43Å and 1.23Å respectively. Average dipole moment of the triglyceride molecule was measured as 1.3010 Debye while electronic dislocation was noted in X+Z direction. In addition, the overall molecular energy was found to be - 2522.7425 a.u. and optimization energy as -58.95 kJ/mol. Also, vibrational frequencies were analysed using the IR spectrum whereas electrostatic potential were mapped for the triglyceride molecule.
Simulation of the kinetics of the curing process of polymer composite materials based on epoxy binders
Authors: Chen Yangyang , Maung Pyi Phyo , Malysheva G V , Paduchin A A 
Published: October 2020

Abstract
This article investigated the kinetics of the curing process of composite material based on epoxy binders under different conditions of heat transfer. A technique for determining the heat capacity and thermal conductivity depending on the degree of cure of epoxy binders was carried out. The kinetic parameters of the binders used to describe the exothermic effects of binders in the chemical reaction were determined. Taking into account the phase state changes and their exothermic effects of the binders during curing, the simulation of curing process of glass fiber reinforced plastics (GFRP) was carried out. Experimental results of determination of heat capacity, thermal conductivity and kinetic parameters of epoxy binders were used as initial inputs for modeling the curing process of polymer composite materials. The influence of the heat transfer coefficient on the temperature state of GFPR was investigated. It was found that the heat transfer condition strongly affects the temperature state of fiberglass during their curing.
Development of a High Strength Polymeric Composite Material Using 3D-Printing and Vacuum Impregnation Technology
Authors: Lopatina Yu A , Slavkina V E 
Published: October 2020

Abstract
This paper offers a method for increasing the strength of FDM 3D printed parts by impregnation in a vacuum chamber in an environment of an epoxy compound with a long lifetime. We investigate the impact of the duration of impregnation and the internal geometry of the part being impregnated on the impregnation degree, expressed in the absence of cavities inside the material. The experimental samples are cylinders made of PLA plastic, the impregnation is carried out in an epoxy resin-based compound with PEPA hardener. The use of this strengthening technology may be useful for expanding the scope of FDM 3D printing from prototyping, being currently the most common application, to manufacturing parts for actually functional structures, which, unlike prototypes, carry load while in use, and therefore need increased strength.
Selection and justification of polymer composite wing load-bearing elements design parameters with material anisotropy and airload
Authors: Baranovski S V , Mikhailovskiy K V 
Published: October 2020

Abstract
The rapidly developing aviation industry is looking for new design solutions in the field of designing modern passenger airliners. To ensure reliability and increase the service life of developed products can help polymer composite materials, which are already successfully used in the construction of a number of aircraft. This work is devoted to the urgent task of determining and optimizing the structural parameters of the carbon fiber wing load-bearing elements, taking into account rational reinforcement schemes. The wall thicknesses, layup patterns of unidirectional layers, the safety margins of the wing structural elements, taking into account the current operational loads for several angles of attack corresponding to different flight modes. The work is part of the methodology for designing a wing of polymer composite materials.
Development of imid-containing appretes for carbon fibers and carbon fabrics
Authors: Storozhuk I P , Pavlukovich N G , Egorov A S 
Published: October 2020

Annotation
The results of research on synthesis and approbation of new imide-containing high-molecular and oligomeric compounds as appretiruyuschih compositions for carbon fibers under thermoplastic polyetherimide matrix (“Ultem-1000”) are presented. It is shown that both polymeric and oligomeric compositions can be used for carbon fiber appreting, but the greatest effect is manifested when using oligomeric apprets.
Thinking development and aesthetic education of students in the process of teaching mathematics by example solutions for one problem
Authors: Zhanys A B , Dautov A O , Aktayeva A U , Askarova A Zh 
Published: October 2020

Abstract
The article discusses one of the leading goals of teaching mathematics - the development of students’ thinking by means of mathematics, it is noted that this requires the creation of special situations, the resolution of which leads to the development of thinking. The possibility of developing logical and figurative thinking of students of secondary schools in the process of aesthetic education using the subject of mathematics is investigated. The beauty of problem solving allows you to increase interest in the study of mathematics. The development of intellectual and creative capabilities, their imagination, as well as broadening the horizons in the application of methodological programs in teaching and evaluating students’ knowledge and skills. The present work is presented on the example of solving one problem by several mathematical methods. Using a mathematical model to solve various kinds of problems with the greatest number of solutions contributes to aesthetic education, allowing you to develop a culture and logical thinking, to form in students the optimal analysis of the task in solving it. The work is presented in an experiment on organizing aesthetic education by knowing the beauty of problem solving, which will fully reveal the criteria for applying the individual approach to learning through the development of thinking in solving various kinds of mathematical problems. The organization of the intensification of the process of mastering knowledge and applying aesthetic beauty is shown by the example of solving problems in mathematics of grades 7-9. We carried out a number of experimental works on the development of thinking and aesthetic education, relying on the activity-based approaches of educational and developmental teaching of mathematics.
Developing a New Type of Jointing the Metal Plates of a Heat Exchanger
Authors: Onishchenko D O , Krotchenko A Yu , Fokin Yu O , Tverskoy M V 
Published: October 2020

Abstract
This paper proposes using a new composition of the metal polymer compound to joint heat exchanger plates. This composition makes it possible to improve the factors of plate junction, such as the cost, safety, efficiency, and rate of the junction procedure. We consider the benefits and drawbacks of the two main ways to joint metal plates of brazed steel plate heat exchangers (BPHE), namely, copper brazing and laser beam welding; propose to joint plates using a metal polymer compound consisting of the metal powder of steel 316L and binding agents; show the metal polymer compound production process; provide the results of the component mixing process depending on the parameters, such as duration and rate of mixing; as well as present the resulting density of the specimens made of the metal polymer compound, depending on the mixing conditions.
Possibilities of Obtaining Diffused Layers upon Saturation of Multilayer Materials with Nitrogen and Carbon
Authors: Polikevich K B , Plokhikh A I , Fomina L P 
Published: October 2020

Abstract
The paper analyzes the processes of saturation of multilayer metal materials with interstitial elements: nitrogen and carbon. The formation of diffusion layers is presented. It is found that the thickness of the laminar layer and the degree of structuring of the sample affect the penetration depth of the diffusant.
Ceramic Matrix Composite Materials for Structural Elements of Aviation and Rocket-Space Equipment
Authors: Stepanov P A , Atroshchenko I G , Nikulina O V 
Published: October 2020

Abstract
Ceramic matrix composite materials based on inorganic binders (based on aluminum-chromium-phosphate binder and quartz glass slurry) and textured quartz filler are obtained by various molding methods at JSC ORPE Technologiya named after A.G. Romashin. The materials were studied in the high-temperature region (at the ambient temperature up to 1200°C during short-term exposure). The main specifications of the materials obtained in comparison with those of quartz ceramic material are shown.
Evaluation the complex of thermal properties for epoxy-based GFRP used in wing of tourist class reusable space vehicle
Authors: Ashikhmina E R , Petrov N M , Prosuntsov P V 
Published: October 2020

Abstract
In general, the prediction the effective properties of fiber reinforced composites is a complicated task due to its heterogeneous properties. Therefore, new approaches can make possible obtaining of the reliable thermal properties of composites with least time and financial costs. This work presents the approach for determination of thermal properties of epoxy-based glass fiber reinforced composites. Firstly, to evaluate the thermal behavior of considered material the numerical modeling was conducted via finite element analysis in commercial software MSC Digimat. To validate the model, two-stage experimental study was carried out. As the result of the experimental research thermal conductivity through-plane was obtained by laser flash method as well as thermal conductivity in-plane – by specialized heat equipment developed in Bauman University with subsequent solution of the inverse heat conduction problem. Summing up, the analytical and experimental data showed good agreement that demonstrates the feasibility of the approach.
Influence of modes of washing-out of the polyvinyl acetate-based substrate on the properties of carbon fiber reinforced plastics obtained by TFP
Authors: Nelyub V A , Borodulin A S , Orlov M A , Polikarpova I A , Kalinnikov A N , Soloviev A I , Dzhafarova S I 
Published: October 2020

Abstract
The article shows the advantage of using water-soluble polyvinyl acetate-based non-woven fabric as a substrate in the manufacture of tfp preforms of products made from polymer composite materials, including gas turbine engine blades. As compared with the applied woven materials, elastomers and films, water-soluble non-woven fabric is easily removed from the surface of the semi-finished product without disturbing its structure and without causing damage to the fibers. It has been established that high-quality washing-out of the substrate does not affect the properties of carbon fiber-reinforced plastics.
Analytical and experimental research of epoxy-based glass/carbon hybrid polymer composites
Authors: Ashikhmina E R , Ageyeva T G , Fedorov Yu S , Klimovich V 
Published: October 2020

Abstract
Nowadays, the significant potential of hybrid polymer composites in terms of weight and cost has contributed to their application in different branches of industry. However, it is known that determination of unique properties of hybrid composites remains significantly challenging as laborious experimental work is usually required. This study aims to develop a numerical material model for prediction of mechanical properties of glass/carbon epoxy-based composites. To validate the material model the subsequent experimental research is proposed. It shows good agreement between numerical simulation results and experimental one.
Evaluation construction made of polymer composite materials by molding using reusable flexible punches production profitability
Authors: Stoyanova M V , Novikov A D , Borodulin A S 
Published: October 2020

Abstract
One of the most common methods for the production of composites is the vacuum infusion method, which consists in the use of a disposable flexible punch pressed to the surface of the mold by atmospheric pressure. A new technology is the use of reusable flexible punches also pressed by atmospheric pressure. The paper compares the profitability of the same construction by these methods production.
Methodology for static tuning of the HEV fuel flow measuring system
Authors: Bozhkov S T , Milenov I , Petrov R V , Leontiev V S , Bozhkov P 
Published: October 2020

Abstract
The modern automobiles are subject of more stringent requirements [1] corresponding to power, torque, fuel economy and ecology legislations, which is led to designing of new power sources and constructions, such as the hybrid electric vehicles (HEV). They are moving by the energy [2], which is ensured by the internal combustion engine (ICE) and the battery. The main factor in this area is the HEV fuel system, which is controlled by the electronic control unit (ECU) [1]. The electronic control of the Spark Ignition Engines (SI engines), as well as the Direct Ignition Engines (DI engines) is based on the certain sensors signals, program maps and management algorithms. The result in this electronic control is the management of the fuel injectors. The management of the fuel injectors consists in the start of injection, injection duration, number of injection events, injection advance, injection pressure etc. Moreover, the fuel consumption and fuel efficiency are the main factors, which are determining the HEV advances. The learning and measuring the HEV fuel consumption, as well as, the conventional automobiles, is the ground for achievement of quality results in the education of the automotive engineers, as well as for obtaining of scientific researching for developments and innovations. Significant meaning in this concept has the real, live and practical performance with the help of testing equipment and test-benches. This paper renders the methodology of static tuning the Fuel Flow Measuring System EFMS100 on the test bench SAV-1 with the support of controller Matrix MIAC MI0245 and Flowcode 7 softwar.
Digital design and technological innovation in the small machine building sector
Authors: Bulavin V F , Bulavina T G , Stepanov C A , Yahrichev V V , Grigoriev N S 
Published: October 2020

Abstract
Integration of CAD products is the governing factor of technical refitting and enhanced competitive advantage of small machine-building enterprises. The digital support associated with PLM and MES platforms makes it possible to state the beginning of a transfer of enterprises to a new type of production. The primary components of the design and engineering stage are as follows: digital design, automated process preparation, and structural engineering. In this process, the part’s virtual copy is the central element of the navigation through the process preparation for production. The digital form of documentation in the PLM platform defines the requirements to start production. Electronic versions of documents are an attribute of project management organization in the team, a condition for rapid modification of the object, and a factor of coordination of work of the whole chain: from the project manager and single operators to stakeholders.
Synthesis and application of manganese dioxide nanoparticles as part of anti-corrosion coatings
Authors: Katnov V E , Stepn S N , Zganshina M R , Kayumov A A , Mendelson V A 
Published: October 2020

Abstract
The paper presents a study of synthesized manganese dioxide nanoparticles effect on the properties of transparent coatings to protect the rolled metal from corrosion. Capacitive-ohmic measurements of the electrochemical cell formed on the studied coatings demonstrate corrosion processes inhibition under the coating with a nanoparticle content of 0.025% and higher.
Field dependence of magnetoelectric effect in the electromechanical resonance region on the Permendur -Quartz - Permendur structures
Authors: Laletin V M , Paddubnaya N N , Filippov D A 
Published: October 2020

Abstract
The results of an experimental study of the field dependences of the magnetoelectric effect on three-layer Permendur-Quartz-Permendur structures in the region of electromechanical resonance are presented. It has been established that at the electromechanical resonance there exists a bias magnetic field region in that an anomalous behavior of the field dependence of the magnetoelectric coefficient are observed. This effect is explained due to the presence of the AE effect in the magnetostrictive material.
Features of the operation of a refrigeration screw compressor for capacity control
Authors: Noskov A N , Shaposhnikova M , Arendatelev I G , Zawadzki I M 
Published: October 2020

Abstract
To ensure the required temperature of the cooled object by maintaining the heat balance between the heat gain and the refrigerating capacity of the refrigerating machine, a compressor performance control system is used. The article presents the dependencies of the change in efficiency coefficient at full and partial performance with joint regulation of productivity and geometric compression ratio. The laws of the optimal change in the geometric degree of compression with a change in performance are given. The experimental characteristics of a screw compressor running on R22 freon were used.
Energy performance analysis of the temperature control system of an object with a random principle of thermal perturbations
Authors: Sulin A B , Timofeevskiy A L , Ryabova T V , Nikitin A A , Muraveinikov S S , Arendateleva S I 
Published: October 2020

Abstract
The application of simulation modeling to the development of a temperature control system for an object with a random nature of thermal loads is considered. The object under study is a facility with enclosing structures made of fiberglass, inside of which there is heat-generating equipment. Thermostatic control of the object is carried out by a fully recirculating ventilation system that provides even blowing of the inner walls of the object with fresh air. To create a simulation model that is closest to real conditions, based on statistical meteorological data for the city of St. Petersburg, a model of meteorological conditions was created, suggesting every three hours the following parameters: ambient temperature, wind speed, solar radiation intensity, cloudiness. Heat generating equipment located inside the serviced facility does not operate continuously. The turning-on of this equipment occurs at random, the duration of work and the amount of heat dissipation also vary. To take into account this circumstance, the specified parameters are selected by the program in accordance with the Simpson distribution. The article presents graphs of changes in temperature and energy characteristics of the system for the three cold and three warm days of the considered annual period of the system operation. Conclusions are drawn about the feasibility of using the simulation method in the design and development of such systems, on the possible increase in their energy efficiency, as well as on the reduction of capital and operating costs.
Development of the design and manufacturing technology of a bactericidal ionizer
Authors: Tikhonov A A 
Published: October 2020

Abstract
The design and manufacturing technology of a bactericidal ionizer with electrolytic coatings of copper and silver forming a galvanic cell are described. The ionizer is capable of creating solutions containing silver and copper ions. Using an ionizer, one can get preventive solutions that strengthen the immune system; medical preparations; cosmetic compositions; receive disinfectant solutions that can destroy a number of pathogenic bacteria and viruses. The ionizer has a low cost; it is easy to use and surpasses analogues in performance. A manufacturing technology for such an ionizer has been developed.
Global Container Shipping Line Digital Transformation and Enterprise Architecture Modelling
Authors: Maydanova S , Ilin I , Jahn C , Weigell J 
Published: October 2020

Abstract
Currently new competitive environment and fundamental changes in the traditional industries are taking place. The digital transformation of companies can be an effective tool to gain a competitive advantage, but its success requires consistent actions, from the strategic vision to implementation. New architectural solutions are needed to ensure a strategic alignment of business and IT architecture for further successful development.
The purpose of this research paper is to develop a conceptual approach and method of Enterprise Architecture modeling for global container shipping lines, allowing the companies an effective development in the context of global changes in business forms and methods, reducing negative impacts and taking advantage arising from these changes.
The evolution of Enterprise Architecture in scopes of digital transformation
Authors: Levina A I , Borremans A D , Lepekhin A A , Kalyazina S E , Schröder K M 
Published: October 2020

Abstract
Nowadays the business has to develop in a rapidly changing environment. Globalization, digitalization and emerging information technologies affect not only the business processes of organizations, but they change the enterprise architecture in a complex way. The purpose of this research is to consider standard existing approaches to the Enterprise Architecture description and modeling. Moreover, the aim of this paper is to point out modern modeling frameworks that display such technologies as the Internet of Things, the Industrial Internet of Things and others, for a complete description of the enterprise model within the framework of Industry 4.0 and digital transformation.