bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on polylactic acid/acrylonitrile butadiene styrene composites filled with micro- crystalline cellulose
Authors: Shaharin Siti Nursyameza , Wahab Mohamad Kahar Ab 
Published: December 2019

Abstract
The effect of surface treatment by using silane coupling agent with varying ratio of micro -crystalline cellulose (MCC) on polylactic acid (PLA) / acrylonitrile butadiene styrene (ABS) blend system were investigated. The study had focused on the blend modification onto the mechanical, structural, morphological and biodegradability properties of PLA/ABS blends. The study showed that the tensile properties of the PLA/ABS blends were deterioriated with increasing in MCC content. The interfacial adhesion was approach by using silane treatment caused by the incorporation of MCC and coupling agent. According to the results, the addition of MCC and surface treatment showed an increasing better in tensile properties as compared to the standardized counterpart. On top of that, the morphological analysis by using scanning electron microscopy (SEM) found out that the interfacial adhesion of MCC was improved in both systems which is with and without silane treatement. Both of the systems was obtained having a weight loss during the soil burial test and the biodegradation process in PLA/ABS/MCC blends as proven in biodegradability analysis.
Investigation on Passivation Behavior of Sn- 0.7Cu Solder in Different Polarizing Conditions
Authors: Ho Wai Kuan , Mohamad Ahmad Azmin , Nazeri Muhammad Firdaus Mohd 
Published: December 2019

Abstract
Corrosion behaviour of Sn-0.7Cu solder alloy was evaluated by conducting potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The solder was polarized under the scan rate of 1.0 mV/s and with the scan range from -2 to 1 VSCE. EIS test was performed at the frequency of 10000 Hz to 0.1 Hz. The oxide layer was found on the surface of solder by post-corrosion characterization. XRD results indicate that the main corrosion products formed on the solder after both corrosion tests were tin oxide such as SnO and SnO2. Porous rod-like structure of corrosion product was observed under morphology analysis of Sn-0.7Cu solder. The corrosion product was represented as tin oxide which matched with the result of XRD.
Investigation of Isothermal Oxidation on Heat- treated Fe-40Ni-24Cr Alloy at 950°C
Authors: Parimin Noraziana , Singh  
Published: December 2019

Abstract
In this research, Ni-based superalloy which is Fe-40Ni-24Cr alloy was experienced a heat treatment process to alter the grain size of the sample to observe its influence on the oxidation properties. The alloys were heat-treated at temperatures of 950°C, 1050°C, and 1150°C for 2 hours followed by water quench. The heat-treated alloys were undergoing an isothermal oxidation test at 950°C for 150 hours in laboratory air. The weight gain of oxidized heat-treated alloy was recorded in order to determine the oxidation kinetic of the test samples. Scanning electron microscopy (SEM) technique was employed in this study to analyze the oxidation behaviour of heat-treated samples. Grain size measurement shows that the grain size increases as the heat treatment temperature increases. The oxidation rate of heat-treated Fe-40Ni-24Cr alloy obeys the parabolic rate law indicating the diffusion-controlled oxide growth mechanism. The fine grain size of alloy heat-treated at 950°C possess a better oxidation resistance and has a lower oxidation rate compared to coarse grain samples. The surface morphology indicate that the fine grain heat-treated alloy at 950°C shows uniform oxide layer formed on the surface, while alloy heat-treated at 1050°C and 1150°C shows the uneven oxide growth, oxide flaking and oxide spallation.
Assessment of modern rolling stock pulling drive gear reliability
Authors: Bobrytskyi S V , Logvinenko O A , Anatskyi O O , Yehorova I M 
Published: December 2019

Abstract
This paper presents an issue of rolling stock pulling drive gear (PDG) reliability assessment in operation, considering the gear and pitch wheel wear. Among main damages attributive to gear and pitch wheel reject are cheeping of teeth, peeling, plastic deformation. It is noted that the PDG reliability assessment shall be reasonably carried out upon a significant probability of their fail-safe operation that is determined by the rolling contact fatigue resistance. The provided mathematical study design on the PDG reliability assessment of ER-2 electrical multiple train and the corresponding mathematical model PH
.=f(Δ
1
, Δ
2
) is developed. The auxiliary curve is added to the reasonable selection of gear-pitch wheel pair. The provided materials allow to reasonably select gear-pitch wheel pairs obtaining the maximum pulling drive gear fail-safe operation probability values that result in the reliability increase. Recommendations on the further application of the suggested approach during repair of pulling drive gears of modern rolling stock are provided.
Simulation model for the collision of the individual components of dry mixes with the inner surface housing during their preparation in high-speed twin-rotor turbulent mixer
Authors: Emeljanova I A , Blazhko V V , Dansheva S O , Shyshko N S 
Published: December 2019

Abstract
To mix the components of dry construction mixtures, various mixer designs are used. Forced mixers are considered the most effective. The mixing of the components in the working space of the forced action mixers is carried out due to the repeated action of the working body on them. In the process of multiple interaction of the working body and the particles of the mixture, they are repeatedly moved in the working space of the mixer. The nature of the movement of the particles of the mixture in the working space is chaotic in nature, which makes it impossible to determine the necessary time for preparing a homogeneous mixture. To ensure high uniformity of the prepared mixtures, it is proposed to use the design of a new mixer with a cascade principle of mixing the components of the mixture. To determine the trajectories of the mixture components in the working space of the mixer of a new design, it is proposed to use the results of the presented analytical studies.
Simulation of performance of subway wooden sleepers and determination of their tense state using Lira software complex
Authors: Fast D A , Shramenko V P , Starukh O S , Ivanchenko O V , Strachnyi I L 
Published: December 2019

Abstract
The article uses the software complex Lira for the calculation of wooden sleepers, in which the finite element method in the form of displacements is used. FEM provides for making a system of equations that is solved by considering each individual finite element, which is very easy to implement and thus is an important advantage of the method. The purpose of its use is to calculate the wooden sleepers for strength and to determine its bearing capacity. The following types of finite elements were chosen to simulate the upper track structure in the subway tunnel: universal rod-type spatial finite element (type 10) and universal finite element of spatial problem of the elasticity theory (type 31). To design a spatial model, a section of the rail with seven sleepers in the subway tunnel was simulated and loaded with one axle of the car, since the influence of the adjoining sleepers on the estimated sleeper is negligible. They were divided into eight-node tetragonal parallelepiped-shaped finite elements. In order to simulate a sleeper encased in track concrete, a movement restriction was introduced at its points of contact with track concrete. The loads are applied to the rail above the middle sleeper symmetrically relative to its middle and are assumed as concentrated forces on each track line. The part of the sleeper above the culvert is not supported by track concrete and can move freely in all directions. To obtain the values of stresses, the maximum-stress theory of strength is used.
Theoretical studies of the deformability and stress state of sleepers in the subway tunnel
Authors: Fast D A , Shramenko V P , Gonchar R A , Pashchenko V V , Radionov H A 
Published: December 2019

Abstract
The purpose of this article is to perform the calculation of this design for the strength of the sleepers in compression according to the “The Strength and Stability Calculation Rules for Railway Track”, which has not been used before. Wooden sleepers in the subway tunnel are encased in track concrete with 2/3 of their length resting on the concrete base. Under the action of rolling stock, stresses and deformations occur in the upper track structure elements. Their dependence on the forces affecting the track is complicated and hard to define. To solve the strength calculation problem, some prerequisites were assumed, and a design diagram and model were created. The magnitude of the vertical modulus of elasticity of the rail pad of the non-ballast track on wooden sleepers in the subway tunnel, the horizontal modulus of elasticity of the track rail, the dynamic vertical pressure of the wheel on the top of the rail, as well as estimated normal stress in the sleeper under the pad were calculated to determine the vertical forces acting on the rail pad of the intermediate rail fastening. The results obtained from the calculation of the wooden sleeper using the “The Strength and Stability Calculation Rules for Railway Track” showed that its bearing capacity is ensured.
Peculiarities of determining the bearing structure load of the body of articulated open wagon made of round pipes
Authors: Fomin O , Lovska A , Bukatova O , Yarenchuk L , Chimshir V 
Published: December 2019

Abstract
The article highlights the peculiarities of creating a wagon of articulated type, the supporting elements of which are made of round pipes. To determine the dynamic load of an open wagon, a mathematical model has been developed, which includes the movement of the open wagon body during the action of longitudinal force on the automatic coupler. The mathematical model solution has been implemented using the Runge-Kutta method in the MathCad software. Accelerations obtained as a component of dynamic load have been taken into account when calculating the strength of the bearing structure of the wagon body. The strength analysis has been carried out using the finite element method implemented in the CosmosWorks software. The results of the calculations showed that the maximum equivalent stresses are within the permissible ones. The strength margin of main elements of the wagon bearing structure and the critical oscillation frequencies are determined. The conducted research will help to develop recommendations on the design of articulated open wagons and increase their operation efficiency.
Formation of geoinformation provision elements of railway networks for logistic transportation management
Authors: Kukhar M A , Kasyanov V V , Shuldiner J V , Maliavin A N , Voronkov O A 
Published: December 2019

Abstract
At present, there is a transition from automated design to information modeling in the road industry. The paper submitted by of using modern software to support the design and operation of railway networks based on materials of geodetic support is carried out in the research. When conducting research is using the scientific methods: measurement, analysis, information modeling. The paper presents an overview of results of the formation of geodetic support of railway routes on the example of real projects. On this basis, by means of geoinformation support was created in the form of conceptual information model of the railway network of Ukraine. The model can be used to solve logistical problems in the field of rail transportation. This module provides a number of opportunities to analyze existing road networks and to design new ones. Results are presented with the help of Topomatic Robur and ArcGIS software systems, in which plans and models of railway networks are developed. Also, the conceptual characterization of the use of geoinformation data in solving the logistic problems of transportation is given. An example is given analyze problem of damage or overlap of the railway track section on the route and to predict an alternative route between the cities of Kharkiv and Odessa.
Methodical peculiarities of state regulation of the wayside protective zones in Ukraine
Authors: Novakovska I O , Zholkevskyi P F , Stetsiuk M P , Ishchenko N F 
Published: December 2019

Abstract
The sizes of the areas of influence, protected zones, and reserved technological areas are contemplated here. There is also an analysis of modern use and following the wayside zones of motorways. The situation with pollution of roadside strips, surface waters, soils, groundwater and roadside vegetation has been analyzed. Solutions on lands protection and creation of prerequisites for the motorway protected zones formation are provided. It has been substantiated that the solution of these problems should be based on the application of mathematical methods and computer simulation with the use of remote sensing and requires detailed geographic research to the level of specific, quantitative justification of transport infrastructure projects in order to ensure optimal land use, recultivation. The comparative analysis of the regulatory requirements of the location highways elements of the and Ukraine, Belarus and the USA roadside territories has been conducted. The advantages of creating space data infrastructure for roadside establishment are elaborated. Establishing the sizes and configuration of the protection zones in the structure of the project documentation for the construction (reconstruction) of highways, as well as their indication in the town planning documentation, on cadastral plans will lead to the introduction of responsibility at the legislative level.
Effects of train driving modes and the rail foundation structure on the rail side wear in small-radius curves
Authors: Potapov D O , Tuley Yu L , Kulik S V , Manuilenko V G , Safoshkina L V 
Published: December 2019

Abstract
Rails are one of the main elements of the upper structure of the railway track. The safety and smoothness of the movement of mobile units depends on their reliable operation. During operation, various defects and damages occur in the rails that can directly threaten the safety of traffic. These defects and damages have different causes and development mechanisms, which depend on many operational factors. Studying the causes of the appearance and development of defects in rails is one of the main tasks to increase the uptime of the railway. The rail side wear continues to be one of the basic reasons for removing rails from the rail track. Earlier studies have demonstrated an apparent effect of unbalanced acceleration, rail track parameters and geometrical irregularities (including bond ones) on rail wear. Mostly, the process is typical for small-radius curves the total length of which in Ukrainian railway network is rather great. The article presents the findings of numerical research into vehicle/track interaction under such operational conditions with consideration of existing and prospective structures of rail fastenings. The authors have concluded that train driving modes and rail foundation structure influence the rate of rail head side wear in small-radius curves on the rail track.
Determination of parameters of cable drums of capstanshunting winches
Authors: Romanovych Yevhenii , Yevtushenko Andrii , Kravets Andrii , Kozar Leonid , Afanasov Georgii 
Published: December 2019

Abstract
The article considers the problem of determining the rational geometric parameters of friction cable drums of capstan shunting winches. The basic technical means for performing shunting works within the cargo yards of railway stations and industrial enterprises are given. Today, shunting locomotives are the most common means of shunting works at railway stations and cargo yards of industrial enterprises. However, using them is not economically feasible for small amounts of shunting. Both sheave-type and capstan shunting winches are often used to move individual cars or groups of cars along the freight front. In the capstan shunting winches, a frictional drum of infinite coiling length is used, which rotates around a horizontal axis. It is established that the known sources give only the theoretical principles of the operation of drums of infinite coiling length and do not contain any practical recommendations for the design and operation of capstan shunting winches. The article provides a theoretical study of the forces of friction that occur between the drum and the cable, as well as between the cable lines when drums with different profiles of working surfaces are used. It was found that in shunting winches, the coefficient of friction of the rope along the drum can increase by 2.5 times, as a result of which it is necessary to increase the curvature of the profile of the drum. Also, friction forces between adjacent branches of a cable wound on a winch drum are considered. On the basis of the conducted study, recommendations on the type and geometrical parameters of cable drums of capstan shunting winches are proposed, which are aimed at extending the service life of traction cables of these mechanisms.
Study of Treatment Efficiency of Wastewater Collected from the Surface of Roads by Natural Zeolite
Authors: Ugnenko E B , Yurchenko V O , Sorochuk N I , Melnikova O G , Viselga Gintas 
Published: December 2019

Abstract
One of the main tasks of raising the technical level of highways, safety and environmental performance is timely and targeted collection and removal of water from the surface of roads and subsequent cleaning of pollution. In modern technologies of water purification processes of water filtering and filtering materials occupy the dominant position. The progressive environmental degradation of water bodies requires constant updating of filter elements, which include higher technological and environmental requirements. The new generation of modern filter materials include zeolites. In order to use the sorbents for the removal of oil, they are to be hydrophobic and, at the same time, absorbing oil well. As a result of comparative evaluation of sorption purification of waste water from the surface of roads, using zeolite and gravel mixture there was determined the efficiency of using alternative materials. The introduction of new methods of treatment using natural zeolites solves the problem of raising the technical level of highways, traffic safety and environmental performance.
Improvement of brake lever transmission for dump cars
Authors: Voloshin D , Afanasenko I , Derevianchuk I 
Published: December 2019

Abstract
The article deals with issues of improved structures of brakelever transmission forindustrial rail cars.The improved dump car structure is an important engineering problem aimed at higher reliability and better technical and economic characteristics of vehicles.The authors evaluatedthe forces acting in the lever transmission of a dump car at various types of brake shoes.The research is concerned with the capacity calculation of the most important transmission elements with the finite element method.By applying the software suite Solid Edge, an example of the improved structure of a lever transmissionwas implemented.The authors evaluated the forces and stresses in a standard transmission structure of these cars at different modes.With the software suite Autodesk Inventor the authors made a capacity test for specialized levers for composite shoes.The results of capacity calculations for the elements of levertransmissionfor dumpcars made it possible to recommend an application of composite materials in place of iron ones.It will considerably decrease carweight and material intensityintechnical service and increase the total reliability of the car.
Improving the output characteristics of planetary hydraulic machines
Authors: Voloshina A , Panchenko A , Panchenko I , Titova O , Zasiadko A 
Published: December 2019

Abstract
Current trends in expanding the field of application of mechatronic systems with a hydraulic drive of active working bodies of self-propelled vehicles necessitates the creation of new designs of hydraulic machines. For mechatronic systems with a hydraulic drive of the active working bodies of self-propelled vehicles, various types of hydraulic machines are used, but special attention is paid to orbital and planetary hydraulic motors. The crank in this hydraulics machines is a rotating hydraulic field formed by the distribution system of the planetary hydraulic motor. The distribution system of the considered hydraulic motor is one of the main mechanisms determining the stable operation of the planetary hydraulic motor. As a result of the research, design schemes, a mathematical apparatus, and a calculation algorithm have been developed that make it possible to justify the angular arrangement of the working and unloading windows of the moving distributor. The angular arrangement of the working and unloading windows of the moving distributor of the planetary hydraulic motor distribution system is substantiated. A technique has been developed for shifting the distribution window of the movable distributor, which allows to reduce fluctuations in the flow of the working fluid, and as a result, improve the functional parameters of the planetary hydraulic motor.
Determination of stresses in thin-walled steel fiber reinforced concrete roofs in the form of hyperbolic paraboloid
Authors: Babych Y M , Andriichuk O V , Uzhehov S O , Pasichnyk R V , Kysliuk D Y 
Published: December 2019

Abstract
The authors have determined the absolute values of deformations of steel fiber reinforced concrete (SFRC) in a thin-walled shell in the form of a hyperbolic paraboloid that on the basis of which the experimental stresses arising in the shell are determined. The article presents the results of theoretical studies of stresses in thin-walled shells of steel fiber reinforced concrete in the form of hyperbolic paraboloid (hypar), which were determined on the basis of the developed calculation method based on the equations of the moment theory of shallow shells. To solve the basic equations, the authors generalized the method of double series of Fourier, which takes into account the curvature of torsion of the hypars. The solution for the non-fixed hypars with rectangular shape was found through the double series of Fourier with additional application of the iteration method. The coefficients in the series are determined analytically using recurrence formulas. An approach to the study of the stress-strain state of rectangular hypars with a fixed contour is proposed.
Results of experimental research of deformability and crack-resistance of two span continuous reinforced concrete beams with combined reinforcement
Authors: Babych Y M , Savitskiy V V , Andriichuk O V , Ninichuk M V , Kysliuk D Y 
Published: December 2019

Abstract
The article presents the analysis of deformability of the continuous reinforced concrete beams under single load. The authors conducted experimental studies of two-span reinforced concrete beams in which classical rebar frames and dispersed reinforcement of concrete with steel fibers were combined. To investigate and compare the effect of such reinforcement on the stress-strain state of the beams, test specimens were made with three different variants of the steel fiber volume distribution, but with the same relative percentage of reinforcement. During the study, the redistribution of effort in beams, maximum deflections in spans, the formation and development of cracks were recorded. The new experimental data were obtained in the course of the research, based on which it can be concluded that the use of additional disperse reinforcement with steel fibers in the stretched zones of continuous reinforced concrete beams allows to increase the flexural stiffness of the elements, their cracking strength, and durability.