Прегледај по Аутор "Kostić, Sonja"

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    DETERMINATION OF THE PARASITIC FORCES THAT OCCUR AS A CONSEQUENCE OF THE MOVEMENT OF THE ROLLER OVER THE MINIATURE PROFILED GUIDE
    (University of Novi Sad, Faculty of Technical Sciences, 2019) Kočović, Vladimir; Kostić, Sonja; Vasiljević, Saša; Santoši, Željko; Košarac, Aleksandar; Kuzmanović, Siniša; Rackov, Milan
    In order to achieve a greater efficiency degree of electrical, mechanical or other assemblies that work by consuming any form of energy, the frictional force that occurs between all moving elements of the system should be minimized. Nowadays, a lot of standard sliding and rolling pairs have been developed, which provide linear movement. Since manufacturers of these elements do not prescribe coefficient of friction when moving movable rollers on a fixed rail, it is often necessary to know the resistance to motion of these elements due to the correct selection of the drive system, and therefore it is necessary to determine them. In this paper, the resistance to motion of roller through the miniature profile guide 15 mm in width and 10 mm in height was tested.
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    MARKET ANALYSIS IN THE REPUBLICS OF SERBIA FROM THE ASPECT OF THE CIRCULAR ECONOMY IN THE ELV DOMAIN
    (Faculty of Engineering, University of Kragujevac, Serbia, 2019) Cvetić, Tijana; Savković, Marija; Aleksić, Aleksandar; Kostić, Sonja
    This paper presents the literature review of circular economy (CE) and ELV recycling in Republic of Serbia. While circular Economy involves the circulation of materials, resources, energy and their reuse, in the automotive industry the circular economy is implemented by re-manufacturing a wide variety of components and parts. Leading vehicle producers souch as Renault, Fiat have implemented elements of circular economy in order to transform end-of-life parts and vehicles into a vehicle production and maintenance resource in order to reduce the consumption of raw materials. According to literature presented, circular economy is not quite implemented in overall ELV recycling process in Republic of Serbia.
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    Theory Reviews - Hardware and Software Support for Testing Material on Specimens of the Small Cross Section
    (2019) Kostić, Sonja; Košarac, Aleksandar; Luković, Vanja; Miljojković, Jasmina
    Testing techniques to obtain the mechanical properties of materials on specimens of the small cross section (miniature specimen) become the subject of numerous researches due to several advantages, in economic and organizational terms. This paper presents the model of the tensile testing device for materials on the specimens of the small cross section, its hardware and software basis. The device proved to be very reliable, so it is suitable for testing the mechanical characteristics of the material, just like the one used for the demonstration of material testing for students.