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Influence of process parameters of printing on mechanical properties of plastic parts produced by FDM 3D printing technology
(EDP Sciences, 2018-11-26)Fused Deposition Modelling (FDM) is a fast-growing 3D printing technology. This technology expands rapidly even in households. Most users set print parameters only according to their own experience, regardless of the final ... -
The magnetic circuit dynamics of a magnetorheological valve with a permanent magnet
(EDP Sciences, 2020-10-14)The magnetorheological (MR) damper uses magnetorheological fluid which, when subjected to magnetic stimuli, generates an increase of damping forces. A significant problem of these dampers is their poor failsafe ability due ... -
Sprung mass positioning by semi-actively controlled damper
(EDP Sciences, 2020-10-14)Recently, the intensive wear of rails, especially in curves of small radii and at switches, has been studied. The wear is caused by the high lateral force peak of the wheel against the rail when entering the curves. An ... -
Dual Hysteresis Model of MR Dampers
(Frontiers, 2020-09-24)This study concerns the modeling of the hysteretic behavior of magnetorheological (MR) dampers. In general, hysteresis is one of key factors influencing the output of such actuators. So far, more attention has been paid ... -
Stribeck Curve of Magnetorheological Fluid within Pin-on-Disc Configuration: An Experimental Investigation
(MDPI, 2020-10-20)The paper focuses on the coefficient of friction (COF) of a magnetorheological fluid (MRF) in the wide range of working conditions across all the lubrication regimes—boundary, mixed, elastohydrodynamic (EHD), and hydrodynamic ... -
Wear of grinding rotors with thermally-sprayed coatings in a high-speed mill
(Elsevier, 2018-10-15)In this paper, the erosion behavior of three types of protective thermally-sprayed coatings and non-coated substrate steel was investigated under semi-industrial test conditions using a laboratory high-speed pin mill DESI-11. ... -
Running-in friction of hip joint replacements can be significantly reduced: The effect of surface-textured acetabular cup
(Springer, 2020-12-01)Hip joint replacements represent the most effective way of treatment for patients suffering from joint diseases. Despite the rapid improvement of implant materials over the last few decades, limited longevity associated ... -
Selective Laser Melting Strategy for Fabrication of Thin Struts Usable in Lattice Structures
(MDPI, 2018-09-18)This paper deals with the selective laser melting (SLM) processing strategy for strut-lattice structure production which uses only contour lines and allows the porosity and roughness level to be managed based on ombination ... -
The effect of surface grooves on film breakdowns in point contacts
(Elsevier, 2016-10-01)Surface roughness plays an important role in transition from full to mixed elastohydrodynamic regime. One kind of features appearing on a real rough surface are grooves longer than contact diameter. It has already been ... -
Influence of Scanning Strategies on Processing of Aluminum Alloy EN AW 2618 Using Selective Laser Melting
(MDPI, 2018-02-14)This paper deals with various selective laser melting (SLM) processing strategies for aluminum 2618 powder in order to get material densities and properties close to conventionally-produced, high-strength 2618 alloy. To ... -
The Effect of Kinematic Conditions and Synovial Fluid Composition on the Frictional Behaviour of Materials for Artificial Joints
(MDPI, 2018-05-10)The paper introduces an experimental investigation of frictional behaviour of materials used for joint replacements. The measurements were performed using a ball-on-disc tribometer, while four material combinations were ... -
Case study: the influence of oil-based friction modifier quantity on tram braking distance and noise
(Serbian Tribology Society, 2017-06-21)In the present study, the twin disc machine and the light rail system was employed in order to investigate the ability of oil-based friction modifier (FM) to optimize adhesion and to reduce noise. The risks associated with ... -
Tribological studies on copper-based friction linings
(Faculty of Engineering, University of Kragujevac, Serbia, 2017-06-22)The objects of this work were nine different copper-based friction linings produced from powder by pressing and sintering. Six copper-based friction linings contained 3 wt.% zinc (Zn) and variable content of tin (Sn), i.e. ... -
Frictional response of lubricant in EHL contact under transient bi-directional shear loading
(Serbian Tribology Society, 2017-12-15)Consideration of performance, efficiency and energy consumption is nowadays an inherent part of the design of every modern machine. These factors are mainly determined by mechanisms taking place within the lubricated ... -
Multiphysics Model of an MR Damper including Magnetic Hysteresis
(Hindawi, 2019-06-26)Hysteresis is one of key factors influencing the output of magnetorheological (MR) actuators. The actuators reveal two primary sources of hysteresis. The hydro(mechanical) hysteresis can be related to flow dynamics mechanisms ... -
Replenishment Differences in EHL Contact Lubricated by New andIn-bearings-aged Grease
(Faculty of Engineering, University of Kragujevac, 2020-03-17)Contact replenishment differences between new and aged grease are studied using ball-on-disc optical fluorescence. Threedifferent greases were aged in rolling bearings for 30 –50 % of their predicted life. A ... -
Lubricant flow in thin-film elastohydrodynamic contact under extreme conditions
(Tsinghua University Press, 2016-12-01)To further extend knowledge about fluid film friction in elastohydrodynamic contact, it is important to examine how lubricant flows. In this paper, several film thickness results obtained by interferometry technique for ... -
Effect of Laser Parameters on Processing of Biodegradable Magnesium Alloy WE43 via Selective Laser Melting Method
(MDPI, 2020-06-09)The global aim of the theme of magnesium alloy processing by the selective laser melting technology is to enable printing of replacements into the human body. By combining the advantages of WE43 magnesium alloy and additive ... -
On the Temperature and Lubricant Film Thickness Distribution in EHL Contacts with Arbitrary Entrainment
(MDPI, 2018-11-15)An understanding of mechanisms which are responsible for elastohydrodynamic lubricant film formation under high sliding conditions is necessary to increase durability of machine parts. This work combines thin-film colorimetric ... -
On the Dependence of Rheology of Hyaluronic Acid Solutions and Frictional Behavior of Articular Cartilage
(MDPI, 2020-06-11)Hyaluronic acid (HA) injections represent one of the most common methods for the treatment of osteoarthritis. However, the clinical results of this method are unambiguous mainly because the mechanism of action has not been ...
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