Browsing Ústav konstruování by Title
Now showing items 1-20 of 75
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Additive manufacturing capabilities for heat switch technology: Key challenges & knowledge gaps
(EUCASS association, 2022-09-28)The paper is to provide an overview of the key challenges and knowledge gaps in additive manufacturing of metals applied to two parts of a novel heat switch technology – a Baseplate and a Flexible thermal structure. Additive ... -
Analysis of Chemisorbed Tribo-Film for Ceramic-on-Ceramic Hip Joint Prostheses by Raman Spectroscopy
(MDPI, 2021-07-01)To understand the possible lubricant mechanism in ceramic-on-ceramic hip joint prostheses, biochemical reactions of the synovial fluid and the corresponding frictional coefficients were studied. The experiments were performed ... -
Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle
(MDPI, 2021-04-03)Total knee arthroplasty is on the rise worldwide. Despite its success, revision surgeries are also increasing. According to the American Joint Replacement Registry 2020, 3.3% of revision surgeries are due to wear, and 24.2% ... -
Analytical Formula for the Ratio of Central to Minimum Film Thickness in a Circular EHL Contact
(MDPI, 2018-09-07)Prediction of minimum film thickness is often used in practice for calculation of film parameter to design machine operation in full film regime. It was reported several times that majority of prediction formulas cannot ... -
Biotribology of Synovial Cartilage: A New Method for Visualization of Lubricating Film and Simultaneous Measurement of the Friction Coefficient
(MDPI, 2020-04-30)A healthy natural synovial joint is very important for painless active movement of the natural musculoskeletal system. The right functioning of natural synovial joints ensures well lubricated contact surfaces with a very ... -
Biotribology of synovial cartilage: Role of albumin in adsorbed film formation
(Elsevier, 2021-12-23)A properly lubricated natural synovial joint is the basis of the proper function of the natural musculoskeletal system to lead an active and painless life. A properly lubricated natural synovial joint is the basis of the ... -
Case study of multiaxial criteria for rolling contact fatigue of bearing steels
(EDP Sciences, 2018-05-25)A rolling contact fatigue (RCF) differs from the classic fatigue in a stress-state. Nowadays, a prediction of the RCF is still not on the sufficient level. A lot of researchers tried to apply different multiaxial fatigue ... -
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 ... -
Computational Approaches of Quasi-Static Compression Loading of SS316L Lattice Structures Made by Selective Laser Melting
(MDPI, 2021-05-10)Additive manufacturing methods (AM) allow the production of complex-shaped lattice structures from a wide range of materials with enhanced mechanical properties, e.g., high strength to relative density ratio. These structures ... -
Design and development of a twin disc test rig for the study of squeal noise from the wheel – rail interface
(Serbian Academic Center, 2022-03-31)The aim of this paper is to present the design of the twin-disc test rig for the study of the wheel-squeal phenomena. This test rig utilizes a dynamic model of the track-train interaction and uses real train wheel for a ... -
Design of a frictionless magnetorheological damper with a high dynamic force range
(SAGE, 2019-03-19)This article discusses an increase in dynamic force range in a spring-damper unit achieved by elimination of sealings´ friction. This friction is a part of damping force that cannot be controlled; therefore, it is undesirable ... -
Deviations of the SLM produced Lattice Structures and Their Influence on Mechanical properties
(MDPI, 2022-04-26)Selective laser melting (SLM) is an additive manufacturing technology suitable for producing cellular lattice structures using fine metal powder and a laser beam. However, the shape and dimensional deviations occur on the ... -
Direct comparison between Co-28Cr-6Mo alloy prepared by Selective Laser Melting and traditional investment casting
(IOP Publishing, 2021-09-22)Thanks to high mechanical properties stable at elevated temperatures, high abrasion resistance, suitable corrosion resistance and biocompatibility, ternary cobalt alloy Co-28Cr-6Mo is a widely used material in the field ... -
DLC-Coated Thermoplastics: Tribological Analyses Under Dry and Lubricated Sliding Conditions
The purpose of this study was to increase the limited wear resistance of polymers in highly stressed tribological contacts. Therefore, diamond-like carbon (DLC) coatings were firstly developed and deposited on polymers. ... -
DLC-Coated Thermoplastics: Tribological Analyses under Lubricated Rolling-Sliding Conditions
(SPRINGER/PLENUM PUBLISHERS, 2022-12-01)The goal of this work is to evaluate the potential of diamond-like carbon (DLC) coatings on thermoplastic polymers for friction and wear reduction in highly stressed rolling-sliding contacts. Therefore, hydrogen-containing ... -
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 ... -
Dynamic Loading of Lattice Structure Made by Selective Laser Melting-Numerical Model with Substitution of Geometrical Imperfections
(MDPI, 2018-10-29)This article deals with the prediction of lattice structure mechanical properties under dynamic loading using finite element method (FEA) with inclusion of geometrical imperfections of the SLM process. Such properties are ... -
Effect of Contact Conformity on Grease Lubrication
(MDPI, 2022-11-01)This work focused on the experimental study of grease lubrication mechanisms around contacts in radial ball bearing 6314. The main objective of this work was to show the influence of conformities and their impact on grease ... -
Effect of heat treatment on mechanical properties and residual stresses in additively manufactured parts
(Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018-05-14)Heat treatments commonly used for post-processing in additive manufacturing (AM) deal with relieving residual stresses. However, generally these treatments reduce strength properties of material such as yield stress (YS) ... -
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 ...