bluuebunny/crossref_metadata_2025 huggingface dataset:
The NPD Process Design Canvas: Tool for NPD Process Creation
Authors: Iqbal M , Suzianti A
Published: May 2020

New Product Development (NPD) is important for the growth and sustainability of companies. One of the most important factors in NPD is the management of the NPD process. NPD process is believed to be a crucial factor in NPD success. NPD process may vary between organizations. Companies must be able to implement the most suitable NPD process. Therefore, the design of NPD process is crucial. This article proposes a tool that can support organizations to design their NPD process. The tool is conceptualized based on the sequence of NPD design method. The tool is based on the form of ‘space of elements’ and called the NPD Process Design Canvas. The concept has been tested and several feedbacks identified. Some of the pros are its ability to capture the risks and elements of process design. Some of the cons are the variation of detail and inability to describe the existing process. Based on the feedbacks, improvements proposed are the addition of specific ‘iterations’ and ‘reviews’ analysis in the canvas, and the paradigm of the canvas as the integrator of several analyses carried out based on the sequence of NPD design method. Further research may focus on the testing of a more sophisticated canvas implementation and how the tool considers the position of companies’ existing NPD process.
ERP Implementation in Crisis Management: A Case Study of Government-Owned Electricity Company
Authors: Lubis Muharman , Parmita Exa , Winiyanti Lumingkewas Lyvia
Published: May 2020

Enterprise Resource Planning plays an outstanding role in integrating business functions and facilitating the exchange of information and communication. Through the ERP system integration, significant speed and productivity gains become the objective that the company wants to achieve directly and comprehensively. One of the companies in the public service sector that potentially implements ERP is the state-owned company in the electricity sector. Unfortunately, until now there are still problems that often occur such as mass power outages, electricity supply crises, and other technical and nontechnical problems. By adopting ERP for crisis management, the company can categorize and meet the time to resolve (TTR) incidents and problems that are set to analyze access management to determine the level of security of the company’s location, so the company can determine the equipment in each location including access rights. This research will identify the implementation of ERP that is suitable for company crisis management implementation.
Lean Startup Approach on Product Design and Manufacture Facility Planning in Uncertain Business Climate
Authors: Dewobroto W S , Marie I A
Published: May 2020

Successful companies can provide the products that suit to consumer desire. There are two approaches in the product manufacturing process which are Product Development Process and Lean Startup. This study aims to demonstrate the conception of Lean Startup and its application in product design particularly in uncertain business climate. After comparing the two methods, Lean Startup approach is appropriate since the validation process in each product development process will certainly increase the possibility of products that suit to the consumer desires and reduce the time needed starting from product design to the market. In order to support Lean concept in the whole processes, there are two techniques that might be applied to support lean operational system, which are the formation of one worker multiple machine (OWMM) cells and Group Technology (GT) cells.
Design of Mobile and Integrated Tyre Repair Tools for Motorcycle
Authors: Eben Haezar T , Samdan W , Yudha A , Taufik Roni S
Published: May 2020

Tyres are a very important component of a motorcycle. Not only vehicle driving components, tyres also play a role in safety, passenger comfort, fuel consumption efficiency, endurance components of car legs and so forth. So, the condition of the tyre must receive special attention from the owner of a motorized vehicle. When riding on a motorcycle, tyre leakage is one of the problems that is often encountered. Not only because of sharp objects, tyres can also leak due to several other reasons. If problems are not immediately sought, leaks in tyres can cause loss of control, endangering the safety of motorists and other road users. And the place and timing of leakage events that cannot be predicted are often a scourge for motorists. After a leak, motorists, especially motorcycle riders, are very dependent on the existence of patched tyre entrepreneurs. With helps from IoT application based in advance, the design of this tool will be an opportunity for tyre patch entrepreneurs to be able to “Pick Up the Ball” to every customer / driver who has a leak. The design of this tool is quite concise and integrated thru Programmable Logic Control (PLC) with each main component making easier for entrepreneurs for patching tyres and can reduce downtime repair / replacement of the tyre.
Clustering on Small-scale Food Manufacturing Industry in West Jakarta: A Fuzzy Analytical Hierarchy Process Approach
Authors: Sulistiandi S , Marpaung B , Sunardi O
Published: May 2020

The small-scale food manufacturing industry has become the most dominant sector in Jakarta, in terms of number and manpower absorption. However, they are challenged with slow growth rates, indicated by their inability to meet national demands. The Government believes that the small-scale food manufacturing industry in Jakarta was formed without comprehensive planning, and yet, they are spread throughout Jakarta. This study aims to cluster the small-scale food manufacturing industry, which was focused on the West Jakarta area as a pilot project. By employing the Fuzzy Analytical Hierarchy Process (Fuzzy AHP), five criteria were considered during the assessment: availability of land, suppliers, facilities and infrastructure, labor, and markets. As a result, an area clustering map was proposed.
Determination of Standard Time and Output Production of Spring Frame Mattress Components using Work Sampling Method
Authors: Rachman Taufiqur , Kumala Sriwana Iphov , Liyanawati Zalukhu Stefanny
Published: May 2020

PT.CMAP which is a company that manufactures mattresses with production process starts from making foam (foaming), mattress covers, spring frames and finishing. Based on observations, obtained that the process of spring frame has the lowest percentage of daily production results. The purpose of this research is to determine the percentage of productive activities, cycle time, normal time, standard time and daily output of the spring frame mattress production process at PT.CMAP. The method used in this research is work sampling method that begins with preliminary sampling, data uniformity test, data adequacy test, calculating cycle time, calculating normal time by including performance factors, calculating standard time by including allowance factor and calculating daily output. The results obtained from this research that the standard time for the process of spring frame mattress components at PT.CMAP which consists of the spring round process is 5.04 minutes with the daily output is 90 pcs, the semifinished spring frame process is 10.99 minute with the daily output is 41 pcs, the list frame process is 14.81 minutes with the daily output is 31 pcs and spring frame shooting CL process is 13.40 minutes with the daily output is 34 pcs.
A structure formation in Ti-Ni powder after high-energy mechanical treatment
Authors: Abdulmenova E V , Kulkov S N
Published: May 2020

In this work a structure formation in Ti-Ni powder after high-energy mechanical treatment in a planetary ball mill with an acceleration of 60g are presented. Mechanical treatment time of powder was 5-300 seconds. It was shown the powder in initial state consists of phase mixture TiN (B2, B19`), Ti2Ni (E93) and TiNi3 (D024). The lattice parameters of powders not significantly change at mechanical treatment and correspond in good agreement with literature data. The quasi-amorphous phase is formed after mechanical treatment and the relative content of phases change so that the relative content of quasi-amorphous phase increases steeply from 0 % to 45 % in first 10 second of treatment mechanical treatment and not significantly changes at more prolong milling. The full widths at half maximum of peaks not significantly change to 10 second mechanical treatment, but the more prolong milling leads to them increasing due to forming of dislocation in all phases, wherein the value of the dislocation density of Ti2Ni phase is more than of TiNi and Ni3Ti phases and corresponds to 1013 cm−2 at 60 second of mechanical treatment.
Inhibitors based on new polysaccharides in technological processes of oil production. Efficiency of inhibition of scale formation and influence on stability of water-oil emulsion
Authors: Fakhreeva A V , Voloshin A I , Telin A G , Magadova L A , Spirikhin L V , Dokichev V A
Published: May 2020

Functionalized nitrogen-containing polysaccharides based on available low molecular weight sample of carboxymethylcellulose (CMC) with a molecular mass of 90 thousand and mono-, di- and tri- ethanolamine were obtained. The study of CMC salts with ethanolamine as inhibitors of salt deposition was carried out at 80 °C by capillary testing. It was shown that at the concentration of 10-30 mg/l these salts inhibit the processes of scale deposition of CaCO3 and their efficiency is 53-80%. Rheological and sedimentation characteristics of artificially obtained water-oil (w/o) emulsions based on oil of the Priobskoye oilfield without and in the presence of low molecular weight sodium salt of carboxymethylcellulose (NaCMC) were studied. It was found that the NaCMC does not increase the viscosity and stability of W/O emulsions at concentrations of 50, 100, 200 mg/l.
Problems of aviation leaded gasoline application on aircraft
Authors: Gryadunov K I , Nemchikov M L , Melnikova I S , Timoshenko A N
Published: May 2020

Special aviation gasoline with specified operational properties is used for aircraft piston engines. The level of operational properties indicators is specified by the special additives introduction. One of these additives is an antiknock additive – tetraethyl lead. The influence of tetraethyl lead contained in aviation gasoline on the oil systems of aircraft piston engines operation are shown in the article. The insignificant content of TEL decomposition products in aviation oils sharply worsens their pumpability and leads to complete fine oil filters clogging in a few minutes of engine operation, which is negative from the point of view of flight safety.
The application of copper-containing nanoparticles as a gas nitriding catalyst
Authors: Yu Isaeva I , Eliseeva E A , Morenko I V , Aleksandrov V A , Yu Ostaeva G
Published: May 2020

The results of the study of the possibilities of using copper-containing nanoparticles obtained by pseudomatrix synthesis as a catalyst for cyclic gas nitriding of steel products were presented in this paper. It was shown by the example of steel 08Yu (corresponding to the European standard of steel DC04/DC03 EN 10139) that the preliminary application of nanocomposite-catalyst including copper-containing nanoparticles and macromolecules of poly-(N-vinylpyrrolidone) polymer pseudomatrix to the product significantly intensified the chemical heat treatment process. It was found that under identical treatment process conditions the thickness of the diffusion layer for a sample with a pre-applied nanocomposite was 90 urn, and without such pretreatment — 42 urn It is noted that the achievement of this effect is due to the catalyst synthesis peculiarities, which allows to obtain a copper sol with a narrow size distribution of particles resistant to aggregation.
AC electrochemical oxidation of nickel and VNZh alloy in alkaline-ammonium solutions
Authors: Kuznetsova O G , Levin A M , Sevostyanov M A , Tsybin O I , Bolshikh A O
Published: May 2020

It was studied the electrochemical oxidation of nickel in an electrolyte of the composition NaOH 2M + NH4OH 4M by using linear and cyclic voltammetry. A significant increase in the process rate has been revealed due to the cathodic polarization of the electrode under study. It was shown the possibility of heavy tungsten alloy processing, such as VNZh-type alloy (in wt%: 78.8 W, 15.2 Ni, 6.0 Fe), under the influence of alternating electric current of industrial frequency in alkaline-ammonium solutions.
Development of scientific and technological bases of processing of cast iron from thermal timing and ladle processing method of the resonant intermittent refining
Authors: Lubyanoi D A , Markidonov A V , Nevolin V M , Lubyanoi D D , Kambalin I O
Published: May 2020

The paper considers the application of the technology of resonant pulsating refining to improve the quality of cast iron products. This technology is used in the production of molds from pig iron and induction cast iron. It is characterized by comparative simplicity and easily fits into existing production. The effectiveness of this technology is at the level of the best world indicators.
21R-Sialon ceramics, obtained by hot pressing
Authors: Lysenkov A S , Stolbova M O , Titov D D , Plokhikh A I , Kim K A , Gridin D V , Frolova M G , Petrakova N V , Danilin K D , Lemeshev D O , Kargin Yu F
Published: May 2020

The formation, densification behaviour and mechanical properties of 21R polytype were studied. Self-propagating high-temperature synthesis obtained the starting powder of 21R-sialon. Sealing was carried out by hot pressing in the temperature range 1650-1800°C. With increasing temperature, there is an increase in density and mechanical properties.
Application of mutagenic treatment of active silt for oxidation of cellulose nitrate
Authors: Saratovskikh E A , Avdeeva L V , Shcherbakova V A , Kazakov A I , Yarullin R N
Published: May 2020

The oxidation of native cellulose nitrate (13.38% N) and cellulose nitrate (CN) treated with UV radiation and ozone (UV+ozone) by a biocenosis of microorganisms of active silt (AS) from sewage disposal plants and by a combination of AS with sulfate-reducing bacteria Desulfovibrio desulfuricans BKM B-1388 and microscopic fungi Fusarium solani BKM F-819 was studied. The use of the preliminary treatment significantly increased the degree of decomposition of CN during its subsequent biodegradation by a symbiosis of AS microorganisms with D. desulfuricans and F. solani. The application of the mutagenic treatment of AS with nitrosomethylurea (NMU) allows the biocenosis of AS microorganisms with CN acting as a pollutant to retain high oxidation ability with good sedimentation properties for 65 days of incubation. The degree of decomposition was 24.36%. Substantial parameters were achieved during the incubation period of treated CN (CNtreat) within the first 5 days, which is promising from the point of view of practical use.
Research of the intermetallics formation mechanism during the synthesis of functionally graded layered steel-aluminum compositions
Authors: Mikheev R S , Kalashnilov I E , Bolotova L K , Kolmakov A G
Published: May 2020

The features of the formation and growth of intermetallic compounds in the production of functionally graded layered steel-aluminum compositions by the arc surfacing process have been revealed. The influence of the intermediate aluminum layer formed by the arc surfacing process on the diffusion zone formation mechanism has been shown.
Copper and cerium co-substituted hydroxyapatite: powders synthesis and sintering
Authors: Nikitina Y O , Petrakova N V , Egorov A A , Titov D D , Ashmarin A A , Barinov S M , Komlev V S
Published: May 2020

Copper- and cerium-substituted and copper-cerium co-substituted hydroxyapatite (HA) nanopowders were synthesized through aqueous precipitation method. The obtained materials were studied by XRD, SEM, BET absorption and dilatometry. The effects of the cation substitution for calcium ions in HA structure on the phase composition, lattice parameters, shrinkage and microstructure of the ceramics were studied and discussed. It was concluded that cerium ions incorporation in small amount (0, 1 mol. %) contribute to a sintering process more than rather higher amount of copper ions (5 mol. %).
Physical and mechanical properties of composite materials in the MoSia2-SiC-TiB2 system
Authors: Perevislov S N , Markov M A , Motailo E S , Vikhman S V , Titov D D
Published: May 2020

In this work, we obtained ceramic materials based on MoSi2, hardened by SiC and TiB2 particles, which makes it possible to increase the heat resistance of the composite and increase the level of its physical and mechanical properties (at a relative density of more than 99, 0 %, tensile strength in bending 520 ± 10 MPa). The shrinkage, density, porosity and weight loss of composite materials during sintering were studied. The value of the ultimate strength in bending of materials at the optimum sintering temperature is determined. The maximum values of physical and mechanical properties are achieved for a material composition of 50, 0 vol. % MoSi2 + 15, 0 vol. % SiC + 35, 0 vol. % TiB2: E = 471 ± 10 GPa; σb = 520 ± 10 MPa, K1C = 4, 4 ± 0.1 MPa • m1/2; HV = 22.1 ± 0.1 GPa obtained at a sintering temperature of 1950 ° C.
Effect of sintering temperature on magnetic hysteresis characteristics of powder alloy Fe-30Cr-8Co (wt.%)
Authors: Ustyukhin A S , Zelensky V A , Milyaev I M , Ankudinov A B , Shustov V S
Published: May 2020

In this work, we studied the effect of sintering temperature (1100 - 1400 °C) and thermomagnetic treatment (TMT) on the magnetic hysteresis characteristics of the Fe-30Cr-8 Co alloy, obtained by powder technology. It has been shown that at sintering temperatures of 1200 °C and below, it is possible to obtain materials with high magnetic characteristics that ensure their technical application. Properties exceed the characteristics of analogues obtained by casting technology. In the range 1200 - 1250 °C, the largest increase in the density of samples is observed with an increase in sintering temperature with a simultaneous increase in the values of magnetic characteristics. It was revealed that the total duration of heat treatment for 40-80 hours is sufficient for the formation of the necessary structure that determines the magnetic properties of the material. Long-term heat treatment (up to 160 hours) contributes to a higher level of magnetic properties.
Magnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti hard magnetic alloy in anisotropic and isotropic states
Authors: Vompe T A , Milyaev I M
Published: May 2020

The magnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti (in wt. %) hard magnetic alloy in anisotropic and isotropic states after various heat treatments were studied. The alloy was prepared by the methods of powder metallurgy. The relative density was 98 %. The coefficient of thermal expansion of the alloy during heating and cooling was 17, 4*10 6 K−1 and 19, 0 *10− 6 K1 in the temperature range of 100 °C - 1300 °C. The kinetics of o-phase formation caused by an isothermal annealing at T = 750 ºC was investigated by means of the hardness measurements. The best magnetic properties of the alloy in anisotropic state were obtained after thermomagnetic treatment with cooling rate 200 ºC/h as Br = 1.22 T, Hc = 42.2 kAm-1 and (BH)max = 31.2 kJm- 3 and on the alloy in isotropic state with cooling rate 40 ºC/h.
Investigation of iron grains growth during solid-phase carbothermic reduction of red mud in the presence of iron metallic particles
Authors: Zakunov A S , Grudinsky P I , Zinoveev D V , Semenov A F , Panova M O , Dyubanov V G , Petelin A L
Published: May 2020

Red mud is a hazardous waste obtained from bauxite ore by the Bayer method. It has a high content of iron. In this study, the iron grain growth process during solid-phase carbothermic reduction of red mud in the presence of added iron metallic particles was investigated. Carbonyl iron, cast iron shots and metallurgical mill scale were used as the additives. The influence of amount and fraction of the additives on size of reduced iron grains obtained after reduction roasting of red mud at 1250-1350°C and 60-180 min duration was studied. It is showed that the best effect on size of iron grains has the addition of carbonyl iron and mill scale. In this way, besides red mud, some other iron-containing wastes can be recycled, e.g. mill scale.
Study of active media based on microparticles of solid-state laser materials
Authors: Burdukova O A , Konyshkin V A , Kopylov Yu L , Lopukhin K V , Petukhov V A , Senatsky Yu V , Zverev P G
Published: May 2020

Active media based on particles of solid-state laser materials distributed in liquid or gas may provide a new solution to the problem of heat removal from laser media. We propose active media based on particles of LiF crystal with F2 color centers, as well as of Nd3+-doped crystals and glasses. Mixtures of index-matched liquids with glass and crystal particles, methods of their preparation, and their optical characteristics are considered. The laser characteristics of the active media under excitation by nanosecond laser pulses are compared. A “slurry laser” based on a dense mixture of LiF:F2 microparticles with an index-matched liquid is demonstrated. Lasing was obtained in small neodymium pentaphosphate crystals (NdP5O14) and unpolished bulk pieces of concentrated neodymium phosphate glass in immersion liquids.
Ti-(15-25)Nb-5Ta Alloy Plate Hardness Research for Medical Applications
Authors: Konushkin S V , Sergienko K V , Baikin A S , Kolmakova A A , Berezina N V , Mikhailova A V , Morozova Y A , Balashov E P , Kolmakov A G , Sevostyanov M A
Published: May 2020

This work is devoted to the study of the hardness of various compositions of TiNbTa alloys for medical applications in the hip joints. This TiNbTa alloy system has a shape memory effect and superelasticity. The paper describes the technology for producing plates 1 mm thick of TiNbTa alloys. Carrying out thermal and mechanical treatments of these alloys. The effect of Nb doping on the structure and hardness of TiNbTa alloys is shown.
Study of the effect of the catalyst on the microstructure and film thickness of RTV siloxane
Authors: Tsareva A M , Nasakina E O , Balashov E P , Baikin A S , Konushkin S V , Sevost’yanov M A
Published: May 2020

An RTV grade siloxane film with a different percentage of catalyst was obtained. The microstructure of the surface of polymer films based on PTB grade siloxane was studied and the effect of the K-18 catalyst concentration on the thickness and microstructure of the obtained films was shown.
Synergetic flame retardant effect of bio-flame retardant based on oxidized wood in polyester’s compositions
Authors: Khvatov A V , Sakharov P A , Lomakin S M , Varfolomeev S D , Lukanina Yu K , Minikh A A , Frolov S M
Published: May 2020

Synthesized bio-flame retardants from plant materials. A comparative analysis of the flammability indices of polyester resin samples containing complex double flame retardants and single flame retardants of bioantipyrene, aluminum hydroxide and ammonium polyphosphate showed a non-additive improvement in flame retardant compositions consisting of double flame retardant compositions.
One dimensional constitutive model of isotropic magneto-sensitive rubber under shear deformation with amplitude, frequency and magnetic dependency
Authors: Wang B , Kari L
Published: May 2020

Modelling the amplitude, frequency and magnetic dependency of magneto-sensitive (MS) rubber in one dimensional case under shear deformation is proposed in this paper. MS rubber is a kind of smart materials which mainly consists of magnetizable particles and rubber matrix. The modulus of MS rubber changes rapidly after the applying of magnetic field which is referred as the magnetic dependency of MS rubber. Besides the magnetic dependency, there is an amplitude and frequency dependency of MS rubber. Specifically, the shear modulus of MS rubber under larger strain magnitude is smaller than the corresponding modulus under small strain and the shear modulus of MS rubber increases with increasing of frequency. A one-dimensional constitutive model consists of a fractional derivative element in parallel with a nonlinear kinematic elastoplastic model to depict the amplitude, frequency and magnetic dependency of MS rubber is developed in this paper. After comparison with the test result, it found that with eight parameters the amplitude, frequency and magnetic dependency can be depict precisely by the model developed. It is helpful for the predicting the dynamic behaviours of MS rubber-based vibration devices in the design phase and promotes MS rubber’s application in sound and vibration area.
Functionalised Composite Materials for the Inflatable Modular System Accomplishment Used as Decoy for the Instruction and Training Maritime Applications
Authors: Mihai C , Ene A G
Published: May 2020

The inflatable modular systems are currently used in training and instruction specific to maritime applications. The main requirements imposed to this kind of systems are represented by: water and air impermeability; high resistance to the UV radiation action, to hydrolysis and to abrasion; resistance both to chemicals contained in seawater, and to the action of microorganisms, bacteria, mildews etc. For the accomplishment of the modular system was develop a composite material having the following physical and mechanical characteristics: mass: 173 gsqm
−1; breaking resistance: min.72 daN5cm
−1 (for both systems); breaking elongation: min. 40% for weft and warp; air permeability: 0 cfm, resistance to water penetration: 1000 mm H
2O col. The floating target was designed considering the minimum requirements imposed to the system, regarding the maximum tension of the basic supports that must not exceed the allowed tension, for the wind speeds of 31 ms
−1, a sea agitation of 7 bf. The experimental programme performed in collaboration with the maritime authorities demonstrated that the inflatable modular system has the dimensional, gravimetric and functional characteristics that correspond to the requirements imposed by the final application.
Effect of Substrate Thickness on Horizontal Magnetoresistance
Authors: Phetchakul T. , Chemthung Y. , Poyai A.
Published: May 2020

This paper presents the effect of substrate thickness on horizontal magnetoresistance that detects the horizontal magnetic field perpendicular to bulk cross section area. The substrate thickness (T) concerns directly to the current density distribution and the effective depth (t) of current path corresponding to cross section area of current. The horizontal magnetoresistance depends on current distribution which concerns with substrate concentration, length, width and thickness of resistor. It changes by the effective depth of current path change by the unbalance between Lorentz’s force and Hall electrical force in vertical direction. From this study, the sensitivity of device increases with the thickness of substrate up to critical substrate thickness and still constant for thickness greater than this critical value. The current distribution is limited when substrate thickness less than a critical value and fully distributes when the thickness is greater than this value. At the same constant current, the longer length of resistor shows the lower current density which needs the longer effective depth of current which causes the critical substrate thickness to be increased accordingly.
Review of Road Materials Self-healing: Problems and Perspective
Authors: Inozemtcev Sergey , Korolev Evgeniy
Published: May 2020

Materials with the ability to restore their own functionality are a promising type of smart materials for road construction. The use of encapsulated functional modifiers is a common solution aimed at implementing self-healing technology. The paper presents general trends in the development of self-healing technology in the field of road materials. A mathematical interpretation of the destruction model of self-healing materials is proposed. The direction of technology development is proposed for the formulation of general requirements and quality indicators of self-healing materials for construction, characterizing the degree of their effectiveness depending on the conditions of use.
A Model for FGM/SMA Bilayer Beams Accounting for Asymmetric SMA Behavior
Authors: Zaki W , Viet N V
Published: May 2020

A new model is proposed for bilayer cantilever beams consisting of shape memory alloy (SMA) and functionally graded material (FGM) layers and subjected to loading at the tip. The model accounts for tensile-compressive SMA behavior through the use of an appropriate set of constitutive relations and considers the deformation of the beam within the frame of the Timoshenko beam theory. The derivation of the model proceeds by first determining the correct sequence in which different solid phase structures develop within the SMA layer as the load is applied, resulting in the formation of distinct solid phase regions. The boundaries separating these regions are then located and used in deriving appropriate moment and shear force equations throughout a complete loading-unloading cycle. The model is capable of tracking the deviation of the neutral surface with respect to the mid-plane and the distribution of martensite in the beam as the load varies. The nonlinear variation of stress and strain in a cross section of the beam is also considered. Results of beam deflection and neutral surface deviation are presented and validated against finite element simulations of a 3D model of a beam consisting of a Nitinol and CNT-reinforced layers.
The effect of processing in a SHF electromagnetic field on the moisture absorption of cured polymer composite materials
Authors: Zlobina I V , Bekrenev N V , Katsuba I S
Published: May 2020

Comparative studies of moisture absorption by cured polymer composite materials (PCM) under conditions of being in a climate chamber for 7 days, previously subjected to short-term exposure to a SHF electromagnetic field with a frequency of 2.45 GHz, have been performed. It has been found that processing with an energy flux density (17-18) x104 mW/cm2 for 2 minutes contributes to a significant decrease in moisture absorption, which is expressed in a decrease in weight change after the presence of carbon fiber and fiberglass prototypes in the chamber compared with control samples by 16.7 and 25%, respectively. The reason for this result, determined on the basis of microstructure analysis, presumably lies in the reduction of the pore size and the increase in the relief of agglomerates, which increases the resistance to liquid penetration. Taking into account the previously established positive effect on improving the strength of PCM processed in a SHF electromagnetic field, the results obtained confirm the feasibility of using this method as a finishing technological operation in the production of PCM products.
High-temperature tribological tests of composite materials
Authors: Roshchin M N
Published: May 2020

The work is devoted to high-temperature tribological tests of carbon-containing materials during friction on 40Kh13 steel in the temperature range of 20 - 800 ° C. The choice of test temperature is based on prospects of creating spacecraft drives for operation without lubrication in the atmosphere of Venus. The studies have shown that at the same load and temperature with increasing slip speed, the friction coefficient increases. With increasing load, the friction coefficient at a given temperature decreases. At a temperature of 300 ° C for speeds of 0.05; 0.16; 0.25; 0.3; 0.37 m / s with increasing load from 0.3 MPa to 1.0 MPa, the friction coefficient decreases by 1.4; 1.8; 1.1; 1.5; 1.5 times, respectively. At a temperature of 500 ° C in the same range of speeds and loads, the friction coefficient decreases by 1.1; 1.4; 1.5; 1.7; 1.6 times, respectively.
The life cycle assessment of the used rails according to the results of cyclic high-frequency tests
Authors: Loktev A , Fazilova Z , Gridasova E
Published: May 2020

The article presents the results of the strength tests and the metallographic studies of used rails with the significant running surface wear. On the basis of the accelerated modeling of the continuously welded rail life cycle, an assessment system is proposed to evaluate the life cycle of the used continuously welded rails that are sent to the rail repairing depots.
The construction of linear soil structures with the use of geosynthetic materials in the severe hydro geological conditions
Authors: Fazilova Z , Chizhikov I , Slepnev P
Published: May 2020

The article is devoted to the construction of the linear soil structure in complicated hydro geological conditions with the help of geosynthetic materials. This structure was proposed as an alternative to the applied extensive methods, such as the substitution of the roadbed soft soils for sand or rubble, or the installation of laying, characterized by high energy and material intensity, causing significant harm to the environment. The monitoring of the facility condition makes it possible to predict its high reliability and durability. The proposed structure and construction technology are described in the developed STO 80193846-007-2012 «The recommendations for the use of biopositive structures in complicated hydro geological conditions».
Development of the construction of overalls for oil workers with improved hygienic properties
Authors: Chorieva M M , Vafaeva Z S , Azimova M N , Gaybullaeva N N
Published: May 2020

This article focuses on improving the working conditions of oil and gas industry workers. Safe working conditions of workers working in the open space are largely determined by their provision with their high-quality workwear, which reliably protects from the effects of adverse climatic and production factors. The aim of the study is to develop rational workwear for oil workers in Uzbekistan. To achieve this goal, the following tasks were solved: - analysis of the working conditions of oil workers, existing workwear and the development of scientifically based requirements for the workwear being developed; - research and selection of a rational package of workwear materials. In the oil and gas industry, work is ongoing year-round, but the main work is carried out in a dry, hot climate. The special clothes given out usually to oil industry workers do not correspond to the conditions of their work and cause fair complaints. Therefore, the creation of rational special clothing for oil workers, taking into account the climatic conditions of this zone and the specifics of the oil and gas industry, is an important industrial task facing scientists and workers in the clothing industry.
Narrow-band optical filter for a spectral-selective control device of physical and physicochemical processes
Authors: Vaganov Mikhail A , Novikova Yuliana A
Published: May 2020

Subject of the present paper is the application of a multichannel optical spectrometer performing spectral measurements in specified areas of the optical range using a set of narrow-band interference optical filters that are tuned to certain wavelengths. Tasks of monitoring and controlling the physical and physico-chemical processes and the prospects of using non-contact optical spectroscopy for their solution are considered. Recommendations are given both on the choice of materials for infrared and visible filters. A visible range filter based on a combination of zirconium oxide and silicon oxide layers has been developed.
Radio links from low-orbit satellites
Authors: Samoylov A G , Samoylov S A , Nasir S A , Tahar I A Al
Published: May 2020

In this article, methods of transmitting the information from low-orbit satellites to the Earth are considered. Transferring the information from a low-orbit satellite to geostationary spacecraft at millimeter-wave frequencies that strongly attenuate in the atmosphere is proposed. The possibility of transmitting information from a low-orbit satellite transmitter with a power no more than 1–2 W and small-sized antenna arrays on the communication line is shown.
Theoretical simulation of quantum cascade lasers based on InGaAs/AlInAs and InGaAs/AlAsSb quantum wells
Authors: Romanova K A , Galyametdinov Y G
Published: May 2020

Quantum cascade lasers based on semiconductor InGaAs/AlInAs and InGaAs/AlAsSb quantum wells exhibit electronic intersubband transitions within conduction bands and attract much attention due to their operation at room-temperature short wavelengths. In this work we performed a theoretical simulation of such quantum cascade lasers and studied the influence of their construction and application conditions on optical behaviour. The intersubband absorption processes in these quanta well structures were studied. Electronic properties and the conduction band edge profiles were simulated as well as the probability densities of the Wannier-Stark states were determined. The simulation results showed that with the rise of the temperature the threshold current density increases which also leads to a decrease in the optical gain. An increase of the applied electric field is accompanied by the optical gain rising and decrease of the threshold current density that results in a blue shift of laser frequency.
Investigation of full arrangement of models on the mechanical properties of samples made from photopolymer material FullCure 720
Authors: Balyakin A V , Vdovin R A , Kyarimov R R
Published: May 2020

The results of experimental studies to determine the relationship between arrangement of synthesized model on build platform of 3D printer ObjetEden 350 and mechanical properties of the model fabricated from FullCure 720 photopolymer material were described. During the study, measurements of hard-fabricated samples were made, and the strength and plastic properties of FullCure 720 photopolymer material while tensile test were analyzed.
Features of cracking during rolling of new aluminum alloys of the Al-Mg-Li system
Authors: Agafonova D V
Published: May 2020

The authors consider the influence of the new integrated method of thermoanalytical analysis on cracking during rolling of materials of the Al-Mg-Li system, advanced for the aerospace components manufacture. The nature of cracking depended not only on the compression degree of the material, but also on the temperature, holding time of the material in the furnace, and rolling speed. The temperature range has been experimentally revealed, that makes it possible to predict and thereby prevent appearing of cracks network over the area, select the optimal mode when rolling advanced materials in the field of aerospace engineering.
The influence of the chemical composition of the Fe-Cr-Al system coatings on the oxide films phase composition
Authors: Shmorgun V G , Bogdanov A I , Kulevich V P , Kharlamov V O
Published: May 2020

The phase composition of the oxide films on the surface of the Fe-Cr-Al system coatings is studied using glancing angle X-ray diffraction. It is shown that at 900 °C the formed oxide films consist of αAl2O3 and (FeCr)2O3, to which FeAl2O4 oxide is added during long-term exposure. An increase in temperature to 1100 °C intensifies the growth of oxide films, and an increase in the aluminum content ensures a stable growth of αAl2O3 and FeAl2O4 oxides. When the aluminum content in the coating is more than 10 at. % at large exposure times, metastable alumina δAl2O3 is formed, the formation of which is associated with a decrease in the concentration of chromium in thin surface layers.
Digital management by supply networks in engineering
Authors: Provotorov V V , Danilevich D V , Fedotov A A , Sergeev S M , Kravets O Ja
Published: May 2020

Current Mechanical Engineering Production has a complicated network structure for technological processes providing. Equipment digitization of material transition allows you to get a real-time slice of economically important indicators. Also, the whole dynamics of production functionality can be presented in the formal view by mathematical models. The article deals with transference processes in linear commercial networks, which are network-like diffusive phenomena described by classical equations of mathematical physics. In addition, many problems of mathematical physics lead to the necessity to define coefficients in the partial differential equation and coefficients in boundary conditions with known functionals from the solution of the matching initial - boundary value problem. In case of depending coefficients in the differential equation on a spatial variable, the real presentation of the solution makes it impossible to define these coefficients. Therefore, other approaches, in particular, spectral ones figure in this article.
The equipment for measuring the solubility of granulated and liquid types of substances in a supercritical fluid
Authors: Khazipov M R , Sagdeeva G S , Pastushenko I L , Sagdeev A A , Galimova A T , Mikhaylov A B
Published: May 2020

Improved device for the implementation of extraction processes using supercritical fluids (SCF), which allows to achieve a constant predetermined pressure in the cell and to eliminate multiple control of the SCF flow rate due to the installation of a chiller that provides increased heat transfer performance and minimal inertia of coolant temperature fluctuation. To assess the reliability of the results obtained at the facility, verification measurements of the solubility of anthracene in supercritical carbon dioxide (SC-CO2) were carried out at T = 423 K and P = 10 - 20 MPa. The results are in good agreement with published data. The methodology for expressing measurement uncertainty is described in detail taking into account parameters that contribute to the uncertainty based on the calculation formula for calculating the solubility of anthracene and the measurement uncertainty of the specified parameters.
The methodology of a part lifetime calculation
Authors: Chumakova L A , Bulganina M Y , Alexandrova A S
Published: May 2020

Reducing mills in piece-reduction at the moment of capturing the pipe’s front end and on the rear end exit are exposed to increased dynamic loads. However these processes at present time are not fully researched. The relevant problem is to decrease dynamic loads in the clamp engine, to increase reliability and durability of the clamp on the basis of the mill’s production growth on the account of pauses decrease, rise of the production amount, and reducing in pipe costs. In the article the results of the study to define a part lifetime in the reducing mill stand have been presented. A part lifetime was calculated in month for more convenient comparison with the production data. The results have been hand over to JSC “PNTZ” for implantation.
Influence use of methanol in the engine on content nitrogen oxides and soot in the exhaust gases
Authors: Likhanov V A , Anfilatov A A
Published: May 2020

The article presents the advantages of using methyl alcohol on tractor diesel compared with traditional hydrocarbon fuel of petroleum origin. The potential effect of methyl alcohol is considered when it is burned directly in a diesel cylinder with an ignition portion of diesel fuel when working with a dual fuel supply system, depending on various installation angles of advancing fuel injection on emissions of harmful substances with exhaust gases.
Research of influence of errors of cam manufacturing on the law of motion of output element
Authors: Samsonenko D M , Khudoyarov V A , Barbashov N N , Abdullina L R , Potapov D M
Published: May 2020

Insignificant error in the moment of manufacturing the mechanism can influence significantly on its’ work. Research of influence of manufacturing error with manufactured mechanism usually is irrational, that’s why necessity of evaluation at the stage of design occurs. Methods of evaluation of this influence are investigated in this paper. The research is implemented by developed algorithm, which also was realized in MATLAB and Python as well. Due this fact process of math simulation doesn’t occupy a lot of time and doesn’t need large calculating abilities. We research same data by independent ways by using 2 different programs and we compare results in order to check and improve model. Also, it’s interesting that technology of computer vision was applied in this work. So, presented paper will be interesting for everybody who practice design of cam mechanisms or research them.
Semantic segmentation in flaw detection
Authors: Kotyuzanskiy L A , Ryzhkova N G , Chetverkin N V
Published: May 2020

The paper presents a review of study on detection and classification of defects using semantic image segmentation based on convolutional neural networks. Taking into account the revealed general features of flaw detection tasks of various industries related to the lack of a large marked data set and the need to detect defects of small sizes. The convolutional neural network of the u-net architecture was chosen as the basis for the decision support system. Testing of this architecture on several datasets yielded positive results regardless of the area of use.
Kinematic analysis anthropomorphic gripper with group drive
Authors: Petrenko V I , Tebueva F B , Gurchinsky M M , Pavlov A S , Antonov V O , Ryabtsev S S
Published: May 2020

The advantages of anthropomorphic robotics include the ability to work in a human-oriented environment and the performance of complex tasks that usually only a person can cope with. One of the most important tasks in this area is the development of powerful anthropomorphic grippers. For several reasons anthropomorphic grippers with group drives are promising, in which movement from several joints is performed from one drive. The purpose of the article is a kinematic analysis of one of the possible design of such a gripper. In the article solved the direct and inverse problems of kinematics in an analytical form using the geometric method. The dependences of the Cartesian coordinates of the joints of the fingers on the joint coordinate describing the motion of a group drive were obtained for the solving the direct kinematic problem. The dependences between the joint coordinate of a group drive and desired position of the finger joints or the orientation of its links were obtained for solving the inverse problem of kinematics. The obtained results can be used further for performing dynamic analysis, parametric synthesis of the design and synthesis a control system for an anthropomorphic gripper with group drive.
Method for determining damping coefficient, characteristic friction force in the needle mechanism
Authors: Rakhmonov I M , Uzakova L P , Naimova D N , Otamurodov J O , Adizova N Z
Published: May 2020

The article presents the development and justification of parameters of the new design of the sewing machine needle mechanism with elastic coupling, which provide an increase in speed modes of operation while reducing operating costs. As well as new scientific results obtained based on theoretical and experimental studies. A new design of the needle mechanism of a sewing machine with an elastic connection is developed and the problem of the dynamics of the needle mechanism with an elastic connection is solved by taking into account the dynamic and mechanical characteristics of the engine, inertial, elastic-dissipative parameters of the mechanism, as well as the resistance force of the sewn materials by the sewing machine. The dependences of the parameter changes in the function on the resistance force of the cross-linked materials are obtained.