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Insight into the Lubrication and Adhesion Properties of Hyaluronan for Ocular Drug Delivery
(MDPI, 2021-09-30)Hyaluronan (HA) is widely used for eye drops as lubricant to counteract dry eye disease. High and low molecular weight HA are currently used in ophthalmology. However, a large portion of the current literature on friction ... -
Triple-pulse LIBS: Laser-induced breakdown spectroscopy signal enhancement by combination of pre-ablation and re-heating laser pulses
(The Royal Society of Chemistry, 2020-02-01)The goal of this work is to examine the effect of a third additional laser pulse on orthogonal double-pulse laser-induced breakdown spectroscopy (DP LIBS). Namely, a pre-ablation laser pulse and re-heating laser pulse were ... -
Effects of solid friction modifier on friction and rolling contact fatigue damage of wheel-rail surfaces
(Springer, 2021-07-22)In railway network, friction is an important factor to consider in terms of the service behaviors of wheel-rail system. The objective of this study was to investigate the effect of a solid friction modifier (FM) in a railway ... -
Raman analysis of chemisorbed tribofilm for metal-on-polyethylene hip joint prostheses
(The Institution of Engineering and Technology, 2021-05-25)The biochemical reaction during the formation of lubricant film the in case of a cobalt-chromium ball on an ultrahigh-molecular weight polyethylene cup was studied. Three types of model synovial fluids and hyaluronic acid ... -
Towards the Understanding of Lubrication Mechanisms in Total Knee Replacements – Part I: Experimental Investigations
(Elsevier, 2021-04-01)This contribution is aimed at the detailed understanding of lubrication mechanisms within total knee replacement. While Part I is focused on the experimental investigation, Part II deals with the development of a predictive ... -
Inlet shape optimization of pneumobil engine pneumatic cylinder using CFD analysis
(IOP Publishing, 2021-06-01)The aim of this study is to minimize minor losses in cap-end ports of a pneumaticcylinder used in pneumobil vehicle engine. Six geometry arrangements of intake ports,including the currently used version, were designed ... -
Hydrodynamic response time of magnetorheological fluid in valve mode: an initial study
(IOP Publishing, 2021-09-24)The transient behaviour of magnetorheological (MR) damper is a very important parameter affecting the performance of this technology in modern semi-actively controlled suspension systems. Currently, the transient behaviour ... -
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% ... -
Novel Approaches to the Design of an Ultra-Fast Magnetorheological Valve for Semi-Active Control
(MPDI, 2021-05-12)This article presents a list of suitable techniques and materials leading to the design of an ultra-fast magnetorheological (MR) valve. Two approaches for achieving the short response time are proposed: (a) by means of ... -
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 ... -
Tribological investigation of diamond-like carbon coated micro-dimpled surface under bovine serum and osteoarthritis oriented synovial fluid
(IOP Publishing, 2015-06-01)Osteoarthritis-oriented synovial fluid (OASF), i.e., that typical of a patient with osteoarthritis, has different physical and biological characteristics than bovine serum (BS), a lubricant widely used in biotribological ... -
Use of acoustic emission method for identification of fatigue micro-cracks creation
(Elsevier, 2015-12-15)This paper is a contribution to the discussion on the possibilities of identification of the time behaviour of various stages of fatigue lifetime directly during experiments using non-destructive testing methods (mainly ... -
The low adhesion problem: The effect of environmental conditions on adhesion in rolling-sliding contact
(Elsevier, 2020-11-18)Low adhesion problem is one of the major problems for railways all over the world because this phenomenon can occur anytime and anywhere. To investigate when poor adhesion conditions can be expected in real operation, a ... -
Study on the wheel/rail adhesion restoration and damage evolution in the single application of alumina particles
(Elsevier, 2019-04-30)The aim of this study is to explore the wheel/rail adhesion restoration performance of alumina particles and the comparison between the continuous and single application test strategies in twin disc simulation. The results ... -
A Review of the Design and Optimization of Large-scale Hydrostatic Bearing Systems
(Elsevier, 2021-08-02)In the last decades, the demand for hydrostatic bearings application has been rising due to the possibilities and advantages they offer. The advancements in hydrostatic lubrication understanding and computer technology ... -
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 ... -
Insight into the response time of fail-safe magnetorheological damper
(IOP Publishing, 2020-10-19)The significant problem of magnetorheological (MR) dampers is their poor fail-safe ability. In the case of power supply failure, the damper remains in a low damping state which is dangerous for several technical applications. ... -
On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication
(MDPI, 2020-01-29)This paper deals with an experimental study of film thickness and friction of commercial-grade grease and its base oil in a highly loaded contact. In-situ measurements were conducted for two surface textures on a ball-on-disc ... -
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 ...
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