bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of Mechanical Properties of the Polymeric Composite Reinforced with Braided Preform
Authors: Kondratiev A , Andrieiev O , Tsaritsynskyi A , Nabokina T 
Published: November 2021

AbstractBraided composite structures based on preforms are widely used in various industries. Owing to use of such preforms high speed and efficiency of the process of manufacturing of polymeric composite materials and structures on their basis can be provided. Knowledge of their properties in the design allows optimizing the production of structures with the specified parameters. The paper gives the review of three approaches to the description of physical and mechanical characteristics of the composite with braided fixtures – based on the classical theory of layered media, rod-based model, and the method of polynomial approximation. The necessary estimated dependencies were derived in order to predict the elastic and structural behavior of the composites under study at any reinforcement angle according to the known characteristics of predetermined angles. Synthesized design parameters, as distinct from the existing ones, allow predicting strength characteristics of the composite based on the braided hoses depending on the positioning and location of the material on the shape-generating surface. For the verification of theoretical results, a number of experimental studies have been carried out with the formation of samples of the material with the different reinforcing angles. Comparison of the analytical and experimental results allows drawing the conclusions that rod-based model gives the best results for the description of elastic behavior of the polymeric composite materials, whereas the obtained polynomial dependences are recommended for the structural behavior. The results of the work represent the basis for solving the problems of calculation of strength of the structures made of composite materials based on the braided preforms
Simulation modelling of material handling using AGV
Authors: Dobrzanska M , Dobrzanski P 
Published: November 2021

Abstract
Modern production systems are mainly characterized by, among others, the use of automated transport systems. One of the components of such transport systems are automated guided vehicles (AGV). These vehicles are primarily used in the material handling due to their greater efficiency, flexibility and lower operating costs. The main aim of the article is to present the possibility of using simulation modelling in the analysis of internal transport operations using automated guided vehicles.
Possibility of using Matlab application to propose fuzzy computer model
Authors: Hrehova S , Husár J , Hladký V 
Published: November 2021

Abstract
More and more organizations in various fields apply the principles of the Industry 4.0 philosophy. The result, among other benefits, is the acquisition of a large amount of data. Data can be of great importance to them in terms of decision support, analysis and, last but not least, as a resource for simulations and computer models. Currently, various approaches and software applications can be used to create models. One of the applications that allows the creation of computer models in various fields is Matlab. Diversity of use is ensured by different sets of tools, which are specifically focused on individual areas and thus provide the necessary tools. In the presented paper we focus on the possibilities of using fuzzy approach in the design of a computer model in the field of heating with the tools of the Fuzzy Logic Controller toolbox. The basis for creating the model will be historical data obtained from the real object. The individual tools of the toolbox, the creation and presentation of rules will be described, as well as the connection of the proposed model with the Simulink environment.
Mechanical properties of ductile cast iron relation to the charge elements
Authors: Pacha-Gołębiowska H , Piekarska W 
Published: November 2021

Summary
In many recent publications on the optimisation of alloys in terms of, among other things, their strength and resistance to wear, a trend can be observed to look for new alloying additives to improve these properties. This paper presents the results of a study on the effect of changes in the chemical composition of EN-GJS-500-7 ductile alloy cast iron on its mechanical properties. In order to confirm the effect of alloying additives on the mechanical properties of the alloys, industrial melting of cast iron was carried out and samples were taken for testing. The smelts were not subjected to heat treatment, but were carried out differently in terms of the feedstock used and based on the analysis of the cooling curve using an automated smelting technology enabling the elimination of degraded Chunky graphite. The influence of the shape of graphite precipitates on tensile strength and hardness was determined, and spectroscopic studies of the microstructure of cast irons were carried out.
Technic solutions analysis and development of the innovation design protective elements of railway tank wagons
Authors: Kravchenko K , Šťastniak P , Harušinec J , Gerlici J , Moravčík M 
Published: November 2021

Abstract
The absence of protective elements on railway tank wagons in case of accidents can lead to significant losses and adverse effects on the environment. This is especially the case for railway wagons for transportation of ignition matters. The article deals with the analysis and the development of the protective elements structures. Two variants of protection are developed - anti-climbing devices and protective shields. Innovation patented design variants are presented. New materials are used in protective constructions, such as aramid, non-Newtonian fluid. A series of measurements and simulation analyses for the integration of protective elements have been made. For the selected constructions, the results of strength researches of constructions are presented. The advantages of the proposed designs are evaluated.
Contribution to the analysis of grinder vibrations using condition monitoring procedures based on vibration measurements
Authors: Dekýš V , Čilíková M , Gavlas M , Novák P , Sapietová A , Pástor M 
Published: November 2021

Abstract
The article deals with the vibration of the workpiece on the grinder using a cBN grinding wheel. The workpieces were made of hardened steel with a hardness of 62 HRC and ceramics: Al2O3, SiC, Si3N4, and ZrO2/Y2O3. Grinding was performed at different infeed rates during 5 consecutive passes. Up and down grinding were also evaluated. Measured realizations of the acceleration of the workpiece during grinding were processed in the time and frequency domain and compared with each other. We consider acceleration patterns to be diagnostic signals that will help to understand the process of chip formation during grinding as well as the process of damaging parts made of the tested materials.
Composite Materials with Epoxy Matrix and Their Properties
Authors: Skalková P , Krmelová V , Krmela J , Ondrušová D , Crkoň A , Benčiková E 
Published: November 2021

Abstract
This work was focused on studying the properties of epoxy (EP) composite materials reinforced with glass, (GF) carbon (CF) and aramid (AF) fibres. The composites were made by hand lay-up (HL) and vacuum infusion process (VIP) with 8, 10, 12 number of fabric layers. Studied were tensile strength, elongation, flexural stress, flexural strain, thermal stability, texture of surfaces, cuts, fractures of laminates and the thickness of the laminate according to the type and number of layers of fabric and the method of manufacture. Composites made by VIP achieve better mechanical properties than composites made by HL. Tensile strength was highest in composites reinforced with AF. Composite materials reinforced with GF exhibit the lowest values of tensile strength. Flexural strength was significantly the highest in CF reinforced composites followed by the laminates reinforced with GF and AF. The highest values of flexural deformation were measured in composites reinforced with AF and the lowest values of flexural deformation were measured in composites reinforced with CF. By thermogravimetric analysis (TG) was recorded weight loss of the EP matrix in the range from 290 to 480 °C and AF in range from 530 to 605 °C. By TG was demonstrated lower content of EP matrix in the composites made by VIP, which was confirmed by comparison of thickness of the studied laminates.
Kinematic and dynamic analysis and distribution of stress for six-item mechanism by means of the SolidWorks program
Authors: Vavro J , Vavro J , Marček L , Taraba M , Klimek L 
Published: November 2021

Abstract
This paper presents a kinematic and dynamic analysis and distribution of the stress for six-item planar mechanism by means of the SolidWorks software. The main purpose of the investigation is connected with the kinematic analysis of planar mechanisms as well as with the implementation of the vector method into the SolidWorks software program in order to determine the kinematic variables of the individual bodies in the whole investigated system. The process of the dynamic analysis is based on the kinematic analysis. The dynamic analysis makes possible to design a system of bodies correctly and it is with the respect to the dynamic loading. For the interpretation of the introduced analysis, the six-item planar mechanism was used as example (representative). Graphic dependence of kinematic and dynamic magnitudes of some points is given in dependence on the angle of rotation of the driving item and in dependence on time. In relation to the kinematic and dynamic analysis and subsequent simulation of the planar as well as spatial mechanisms, it is great solution to use SolidWorks software program. The considerable advantage of this mentioned program is based on its simplicity from the aspect of modeling and moreover, it is important to point out that utilisation of the mentioned program leads to results which are precise and accurate in the case of the numerical solution of the equations in the whole magnitude referring to motion of mechanism while the given results are obtained in the graphic form.
Influence of design features of a multi-edge shredder on the operational characteristics of the process of comminution corn stalks
Authors: Łączny D , Macko M , Moraczewski K , Lewandowski J 
Published: November 2021

Abstract
The paper presents a comparative analysis of the effect of selected design features of blade and disc units on the functional characteristics of the process of grinding corn stalks in specific ranges of input variables. The effect of changes in the geometric features of the working units and rotational speeds on the energy demand during the grinding process was estimated. On this basis, an assessment of the quality of the shredding product in terms of shape and size was also made.
Results verification of numerical simulation of the side impact of a vehicle in a three-point bending test
Authors: Evin E , Nemeth S 
Published: November 2021

Abstract
The research objective was to use numerical simulation to verify safety characteristics of deformation zone reinforcements subjected to bending, obtained from experimental results of the stretch-bending test. The methodology proposed for result verification by means of numerical simulation using a three-point bending test was verified on a sheet metal strip made of micro alloyed steel H 220 PD and a two-phase ferritic-martensitic steel DP 600. Material data for the material model according to Krupkovsky were determined in the tensile test. The measured data were processed tabularly and graphically. A comparison of the deformation work constant and the stiffness and deformation force constants shows that a very good match between the measured and the calculated characteristics has been achieved. Based on the data obtained, it can be assumed that it is possible to reduce the weight of deformation elements while maintaining the required safety characteristics by replacing micro alloyed steel H 220PD with the two-phase DP steel.
Method of Modelling a Tank with Ribbing using a Spatial Scanner for Optimized Control of Volume Characteristics
Authors: Krenicky T , Straka L 
Published: November 2021

Abstract
Increasing requirements for product quality, whether from the side of technical standards or customers, generate demands on the optimization of measurement and data evaluation processes, which include also dimensional characteristics. The paper deals with determining the volume of the tank of a railway wagon with ribbing. In practice, volume flow meters are usually used to measure the internal volumes of manufactured tanks, which measure the volume of water when filled with water. The method is not only time-consuming but also energy-consuming and generates a large amount of wastewater. Therefore, these obsolete methods are gradually being replaced by those that allow effective inspection of tank wagon dimensions according to the technical documentation. The topic of the paper is a description and verification of the design of a progressive method of determining the internal volume of the tank using a spatial 3D scanner Faro FocusS150 and software processing of measured data. At the same time, verification of compliance with the requirements for the accuracy of determining the internal volume of the tank is presented. The aforementioned methods are therefore compared in terms of accuracy, complexity and time consumption.
Modeling the longitudinal dynamics of electric multiple units with Xcos/Scilab software
Authors: Jackiewicz J 
Published: November 2021

Abstract
During the traction and braking of trains, substantial longitudinal dynamic forces might occur in couplers. The method of modeling these forces for two different electric multiple units (EMUs) is presented in this study. For the EMUs consisted of independent vehicles, each of which rests on two bogies, computer simulations were carried out. Simulations were also executed for EMUs with Jacobs bogies, which support bodies of two adjacent carriages. The dynamic modeling of vibration protection train systems includes nonlinearities.
Production injection moulds with additive technology by the HP MJF 4200 printer
Authors: Chval Z , Raz K , Stepanek M 
Published: November 2021

Abstract
This paper is focused on the production plastic parts. It is describing two technologies-injection moulding and additive technology. The production process of the metal mould for the new parts takes about ten weeks. It is necessary to make some reductions after the mould is produced. It is increasing the time which is necessary for the prototype of products. This time (from the initial design of mould to the prototype of product) can take about six months. Additive technologies can be used for decreasing this time and for cost reduction. Moulds produced by the additive technology are mostly special inserts which can be implemented in the universal design of mould. It is also possible to produce whole moulds from plastic material. These moulds can have integrated cooling channels. There are high demands on the material of the mould with respect to the thermal resistivity, toughness and surface quality. There are really often used SLA technologies, which are considering the High Temp Resin and Material Jetting Digital ABS. Other options used in the factories are Somos PerFORM and Digital ABS Plus. This paper deals with the possibility of usage of the HP Jet Fusion technology with the material PA12 GB for the production of mould inserts and it is evaluating this process and repeatability of process.
The method of measuring motion capture in wheelchairs during actual use – description of the method and model of measuring signal processing
Authors: Wieczorek B , Kukla M 
Published: November 2021

Abstract
The aim of the article is to verify the method of measuring motion capture in wheelchair during conditions of actual use and to formally describe how the measurement points are processed. The developed method and the measurement data processing process extract a set of parameters from the study that describe the kinematics of the human body while propelling a wheelchair. The method includes an algorithm to process data from video recorded with a sports camera to the coordinates of the marker position. For the selected marker positions, a data processing algorithm was proposed to determine universal parameters used in the assessment of the kinematics of the human body in terms of wheelchair use. The method has been verified with actual tests that analyzed the kinematics of the human body while propelling a wheelchair under various operating conditions. The proposed method of measuring motion capture involves inexpensive research equipment, offers the possibility of use in real conditions.
Overview of the possibilities of surface modification of materials using energy beam technologies
Authors: Balint Bali R , Zajac J , Botko F , Botková D 
Published: November 2021

Abstract
Along with new trends, the manufacturing industry is also forced to move forward. Therefore, we focused on the use of Waterjet Peening technology - WJP. With the help of this technology, we can strengthen the material (harden) and remove residual stresses. This technology uses high pressure of water jet. Parameters also play an important role, namely the distance of the nozzle from the material being machined, the working pressure is standing, the feed rate, the number of cycles, etc. WJP technology is also promising from an ecological point of view, no harmful substances are formed during machining. Studies have also shown that, there are no heat affected zones during machining. When comparing the mentioned technology on samples made of surgical steel and titanium alloy, it was shown that the sample made of surgical steel showed greater signs of corrosion traces. Based on an experimental comparison of WJP technology and shot blasting technology, it is shown that the technologies achieved relatively the same results in terms of residual stress removal. A significant difference was found on the surface of the material, in the form of the degree of surface damage. With the help of WJP technology, the material did not reach such a roughness level as after shot blasting technology.
Topology optimization of the tool holder produced with additive manufacturing
Authors: Stepanek M , Raz K , Chval Z 
Published: November 2021

Abstract
This paper deals with the topology optimizations of tool holder where three different mass targets were required. The holder was loaded with 499 N. Weight reduction of the tool holder placed in tool turret can positively affect the bearing durability. Easier manipulation with the holder is one of the results. In the process of the topological optimization manufacturing constraints, such as overhang prevention, self-supporting and material spreading were defined for needs of Direct Metal Laser Sintering production technology. Structural analyses of three obtained geometries were simulated for evaluation of the stiffness in three main directions of the tool holder. Finally, the weight and the stiffness of each individual geometry was compared and prepared for manufacturing.
Simulation of manipulation task using iRVision aided robot control in Fanuc RoboGuide software
Authors: Bulej V , Bartoš M , Tlach V , Bohušík M , Wiecek D 
Published: November 2021

Abstract
The article deals with simulation of visual guided robot (VGR) in offline programming software Fanuc RoboGuide. At the beginning there is a brief description of the Fanuc RoboGuide system. The practical part contains an example of the task where the configuration and demonstration of offline programming of visual guided robot system via industrial camera is presented. The main aim of the work is to practically verify the functionality of the system usable for intelligent handling and assembly workplaces.
Improving mechanical properties of the UIC test bench
Authors: Čajkovič L , Pribilinec F 
Published: November 2021

AbstractBrakes are one of the most important components of vehicles. This is due to their function of decelerating, regulating vehicle speed and keeping vehicles stationary. The correct function and reliability of this system is essential for safe operation and vehicles driving.In our case, we deal with the brakes of rail vehicles. As trainsets achieve higher weights and speeds, great emphasis is also placed on improving the friction components of brake systems, which must meet the strict parameters set by the International Union of Railways (UIC) and must be tested on specialized approved test benches, before being put into service. As the demands on the development of friction components increase, so do the demands on their testing. From this point of view, there is necessary constant improvement in the measuring lane of the brake bench. It is necessary to improve the measuring and control technology as well as the mechanical components.This paper deals with the study of mechanical components in terms of operational dynamics. The main idea of the work is to create a virtual model of the brake bench in order to simulate the operating states and determine the critical modes with a possible adverse impact on the course of measurement and control. During the measurement, the monitored parameter is an important simulated mass, which must meet a precisely determined tolerance for the success of the measurement.
Issues related to an attempt to recreate the geometry of a non-standard spur gear
Authors: Konecki K , Wojtkowiak D , Talaśka K , Kołodziej A , Domek G 
Published: November 2021

Abstract
Modern machine manufacturers are making the design and technology of their products more and more complicated. This is to protect against a frequently used practice at customers, i.e. making extra parts on your own. This is because entrepreneurs often cannot afford to order expensive original spare parts and - using reverse engineering - prepare working drawings and commission the components to be made in their own machine park or externally from local suppliers. However, the matter is more complex in the case of gears, which so far have been designed on the basis of the selection of standard geometric parameters. A small modification of one or more of these parameters is enough and it becomes very difficult to recreate the geometry of such a gear. This paper presents the issues related to the reverse engineering of a spur involute gear with very non-standard parameters m = 4.98, α = 26.325 °, x = 0.0695, y = 0.795, c* = 0.383. Further metrological steps were proposed that should be taken to correctly identify at least the fact that the test object is not a part produced by standard modular tools (Fellows cutter, Maag rack cutter, worm cutter, etc.). The work also includes short graphical analyzes of the recreated geometry.