Search results for: Tribology

• TRIBOLOGY INTERNATIONAL

  Journals

  ISSN: 0301-679X , eISSN: 1879-2464

• TRIBOLOGY LETTERS

  Journals

  ISSN: 1023-8883 , eISSN: 1573-2711

• Tribology of the cartilage cells in the intelligent bioreactor

  Publication

  • K. Wierzcholski

  - Russian Journal of Biomechanics - Year 2007

  W badaniach analityczno-numerycznych wyznaczone zostały pola prędkości przepływu lepkosprężystej, odżywczej nienewtonowskiej cieczy biologicznej, a także powstające siły tarcia w trakcie hodowli w warstwie granicznej wokoło powierzchni hodowanych komórek w bioreaktorach, stawach człowieka oraz w szczelinach mikrołożysk. Dodatkowo rozpatrywane będą przepływy potencjalne płynu stawowego z jamy stawowej, które odżywiają chrząstkę...

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• Tribology of stochastic phenomena on the hard tissue.

  Publication

  • K. Wierzcholski

  - Year 2004

  Praca przedstawia model matematyczny zjawisk tribologicznych podczas hodowli tkanek twardych, w tym chrząstek stawowych. Uwzględnia się chropowatości powierzchni hodowanych chrząstek. Problem tribologiczny uzewnętrzniony został koniecznością sterowania wartościami sił tarcia jakie powstają w cienkiej warstewce przyściennej opływanej tkanki cieczą biologiczną w trakcie hodowli. Taki model matematyczny nie był do tej pory rozpatrywany.

• Tribology of bone tissue culture in bioreactor.

  Publication

  • K. Wierzcholski

  - TRIBOLOGIA - Year 2003

  Opracowano system tribologiczny powstających sił tarcia w bioreaktorze. Pomimo, że wartości sił tarcia osiągają wartości poniżej 0,1 N to mają one decydujący wpływ na wartość porostu tkanki. Mechanika opływu tkanki cieczą o właściwościach biologicznych nienewtonowskich oraz hydrodynamiczna teoria opływu warstwy przyściennej jest bazą wyznaczania parametrów trybologicznychniniejszej pracy.

• TRIBOLOGY TRANSACTIONS

  Journals

  ISSN: 1040-2004 , eISSN: 1547-397X

• Ionic liquids as an example of lubricating oils used in a field of tribology

  Publication

  • Z. Lustig

  - Year 2011

  Podczas prezentacji ustnej pokazano przykłady cieczy jonowych, ich możliwości w wykorzystaniu jako zastąpienie tradycyjnie używanych dziś smarów. Ponadto dokonano porównania kilku właściwości "tribologicznych" między cieczami jonowymi a obecnie wykorzystywanymi smarami

• Tribology Online

  Journals

  ISSN: 1881-2198

• Tribology in Industry

  Journals

  ISSN: 0354-8996

• Mocaxue Xuebao/Tribology

  Journals

  ISSN: 1004-0595

• Ecology In Tribology: Selected Problems of Eliminating Natural Oil-Based Lubricants from Machine Friction Couples

  Publication

  • M. Wasilczuk
  • J. Łubiński
  • K. Zasińska

  - TRIBOLOGIA - Year 2023

  The elimination of mineral oil-based lubricants from machines has multiple beneficial effects on the natural environment. Firstly – these lubricants are a direct threat to the environment in the event of leaks; secondly – their elimination reduces the demand for crude oil from which they are obtained. In addition, in many cases, e.g. when replacing traditional lubricants with water, friction losses in the bearings can also be reduced...

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• Calculation of flatness errors formed on the tool during finishing machining by lapping. Second International Tribology Conference, SITC 2002.

  Publication

  • A. Barylski
  • M. Deja

  - International Journal of Applied Mechanics and Engineering - Year 2002

  Płaskość przedmiotów obrabianych zależy głównie od płaskości narzędzia stosowanego w docieraniu. Orientacja przedmiotu na docieraku musi być wyznaczona w celu określenia korelacji pomiędzy błędami płaskości obu powierzchni. Metoda wyznaczania błędów niepłaskości narzędzia przedstawiona została w referacie. Pokazane zostały przykładowe położenia przedmiotów o różnych kształtach na czynnej powierzchni docieraka z błędem wklęsłości.

• PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY

  Journals

  ISSN: 1350-6501 , eISSN: 2041-305X

• Tribologia biołożysk i inteligentnych bioreaktorów problemem grantu europejskiego = Tribology of biobearings and intelligent bioreactors as the main problem of euro-project

  Publication

  • K. Wierzcholski

  - Year 2005

  Praca przedstawia kluczowe problemy związane z organizacją współpracy z uczelniami niemieckimi i badaniami naukowym przeprowadzanymi w zakresie biomechaniki i biotribologii w ramach grantu europejskiego MTK-CT-2004/2008-517226, którego koordynatorem na Wydziale Oceanotechniki i Okrętownictwa Politechnice Gdańskiej jest prof. Krzysztof Wierzcholski

• JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME

  Journals

  ISSN: 0742-4787 , eISSN: 1528-8897

• INDUSTRIAL LUBRICATION AND TRIBOLOGY

  Journals

  ISSN: 0036-8792 , eISSN: 1758-5775

• Bio and slide bearings: their lubrication by non-Newtonian fluids and application in non conventional systems. Vol.3. Tribology processes for cells human joints and micro-bearings

  Publication

  • K. Wierzcholski

  - Year 2007

  W niniejszej monografii przedstawiony został aktualny pogląd dotyczący procesu smarowania stawów człowieka od strony mechaniki, a szczególnie hydromechaniki i metod matematycznych. Wyznaczono pola prędkości przepływu lepkiej, odżywczej nie Newtonowskiej cieczy biologicznej, a także powstające siły tarcia w trakcie ruchu cieczy w warstwie granicznej wokoło współpracujących powierzchni. Dodatkowo rozpatrywano przepływy potencjalne...

• Tribologia: Finnish Journal of Tribology

  Journals

  ISSN: 0780-2285

• Advances in Tribology

  Journals

  ISSN: 1687-5915 , eISSN: 1687-5923

• TRIBOLOGY & LUBRICATION TECHNOLOGY

  Journals

  ISSN: 1545-858X

• Tribology-Materials Surfaces & Interfaces

  Journals

  ISSN: 1751-5831 , eISSN: 1751-584X

• GUT Tribology

  Laboratories

  • Department of Machine Design and Vehicles
  • Department of Marine Mechatronics

  * badania tarcia i zużycia materiałów tribologicznych * badania eksperymentalne układów łożyskowych (tocznych i ślizgowych) smarowanych olejem, wodą, zanieczyszczonymi smarami lub smarami smarowanymi * teoretyczne badania wykorzystania modeli zweryfikowanych eksperymentalnie (w tym MES, CFD i FSI) * eksperymentalne badania wytrzymałości zmęczeniowej (łożyska ślizgowe cienkowarstwowe) * projektowanie nowych i modernizacja istniejących...

• On the Possibilities of Decreasing Power Loss in Large Tilting Pad Thrust Bearings

  Publication

  • M. Wasilczuk
  • G. Rotta

  - TRIBOLOGY LETTERS - Year 2013

  Journal Menu About this Journal Abstracting and Indexing Aims and Scope Article Processing Charges Articles in Press Author Guidelines Bibliographic Information Citations to this Journal Contact Information Editorial Board Editorial Workflow Free eTOC Alerts Publication Ethics Submit a Manuscript Table of Contents Abstract Full-Text PDF Full-Text HTML...

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• The Application of Chitosan as a Modifier for Lubricating Greases Based on Vegetable Oil

  Publication

  • R. Kozdrach
  • J. Skowronski
  • R. Kozdrach

  - Tribology in Industry - Year 2019

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• The Tribological, Physico-Chemical and Rheological Properties of Lubricating Grease Produced on Epoxy Resin Base

  Publication

  • R. Kozdrach
  • R. Kozdrach

  - Tribology in Industry - Year 2020

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• The influence oil additives on spread cracks in silicon nitride

  Publication

  • W. Karaszewski

  - TRIBOLOGY INTERNATIONAL - Year 2008

  The paper presents an experimental study of the influence of oil additives (Cl, S, P, cerium dioxide (CeO2)) on spread cracks in silicon nitride. The additives Cl, S, P are bound in molecules in liquid form soluble in the base oil. The CeO2 is purely in powder form in suspension. The use of CeO2 powder was made based on the good results of polishing of silicon nitride. A ceramic angular contact ball bearing was modelled using a...

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• Modeling lubricant flow between thrust-bearing pads

  Publication

  • G. Rotta
  • M. Wasilczuk

  - TRIBOLOGY INTERNATIONAL - Year 2008

  Inlet temperature is one of the main inputs in all models for the analysis of fluid film bearing performance. At the same time, inlettemperature distribution and also oil velocity distribution at the inlet are the result of flow phenomena in the gap between the bearingpads. These phenomena are complex and in many cases further affected by any special arrangements of forced oil supply to the gapbetween pads. The reason for such...

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• Structural properties of foil bearings: a closed-form solution validated with finite element analysis

  Publication

  • P. Hryniewicz
  • M. Wodtke
  • A. Olszewski
  • R. Rządowski

  - TRIBOLOGY TRANSACTIONS - Year 2009

  Fluid film thickness in a compliant foil bearing is greatly influenced by the deflection of the bearing structure. Therefore, in order to properly model performance of a foil bearing, it is mandatory that the deflection of the compliant bearing structure due to the generated hydrodynamic pressure is determined accurately. This article proposes an easy-to-use two-dimensional model, which takes into account detailed geometry of the...

• Evaluation of turning with different cooling-lubricating techniques in terms of surface integrity and tribologic properties

  Publication

  • R. Maruda
  • G. Krolczyk
  • S. Wojciechowski
  • B. Powalka
  • S. Klos
  • N. Szczotkarz
  • M. Matuszak
  • N. Khanna

  - Tribology International - Year 2020

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• Tribological and thermal behavior with wear identification in contact interaction of the Ti6Al4V-sintered carbide with AlTiN coatings pair

  Publication

  • M. Bogdan-Chudy
  • P. Niesłony
  • M. Gupta
  • S. Wojciechowski
  • R. Maruda
  • J. Gawlik
  • G. Królczyk

  - Tribology International - Year 2022

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• Synergisms and antagonisms between MoS2 nanotubes and representative oil additives under various contact conditions

  Publication

  • A. Tomala
  • M. Ripoll
  • J. Kogovšek
  • M. Kalin
  • A. Bednarska
  • R. Michalczewski
  • M. Szczerek
  • R. Michalczewski

  - Tribology International - Year 2019

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• Effect of ageing automotive gear oils on scuffing and pitting

  Publication

  • W. Tuszynski
  • R. Michalczewski
  • W. Piekoszewski
  • M. Szczerek

  - Tribology International - Year 2008

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• Technological and tribological aspects of milling-burnishing process of complex surfaces

  Publication

  • J. Kalisz
  • K. Żak
  • S. Wojciechowski
  • M. Gupta
  • G. Krolczyk

  - Tribology International - Year 2021

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• The lubricant-coating interaction in rolling and sliding contacts

  Publication

  • R. Michalczewski
  • W. Piekoszewski
  • M. Szczerek
  • W. Tuszynski

  - Tribology International - Year 2009

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• Effects of surface texturing and kind of lubricant on the coefficient of friction at ambient and elevated temperatures

  Publication

  • S. Wos
  • W. Koszela
  • P. Pawlus
  • J. Drabik
  • E. Rogos

  - Tribology International - Year 2018

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• Concept of cavitation erosion assessment of austenitic 1.4301 stainless steel based on roughness development

  Publication

  • D. E. Zakrzewska
  • M. Buszko
  • A. Marchewicz
  • A. Krella

  - Tribology International - Year 2023

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• The Innovative Research Methodology of Tribological and Rheological Properties of Lubricating Grease

  Publication

  • R. Kozdrach

  - Tribology in Industry - Year 2021

• Characterization of NiTi SMA in its unusual behaviour in wear tests

  Publication

  • N. Levintant-Zayonts
  • G. Starzynski
  • M. Kopec
  • S. Kucharski

  - Tribology International - Year 2019

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• Numerical modelling and experimental verification of compressible squeeze film pressure

  Publication

  • T. Stolarski

  - TRIBOLOGY INTERNATIONAL - Year 2010

  The validity of using the Reynolds equation for compressible squeeze film pressure was tested with computational fluid dynamics (CFD). A squeeze film air bearing was instrumented with pressure sensors and non-contacting displacement probes to provide transient measurements of film thickness and pressure. The film thickness measurements also provided input parameters to the numerical prediction. However, numerical results showed...

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• Influence of magnetic field on wear in high frequency reciprocatingsliding contacts

  Publication

  • T. Stolarski
  • Y. Makida

  - TRIBOLOGY INTERNATIONAL - Year 2011

  Results of experimental studies concerning the influence of permanent magnetic field on wear of dry sliding contact operating at short stroke and high frequency are presented. It was found that horizontal magnetic field with different orientations relative to the sliding direction is affecting performance of the contact. The increase in frequency of sliding reduces accumulated mass loss and lowers the surface roughness of the wear...

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• Running characteristics of aerodynamic bearing with self-lifting capability at low rotational speed

  Publication

  • T. Stolarski

  - Advances in Tribology - Year 2011

  An aerodynamic journal bearing that is capable of self-generating squeeze-film pressure is presented and its dynamic characteristics investigated numerically and experimentally. A numerical method based on a time marching static model was applied to assess the orbit trajectory path of the rotor upon a perturbation. Experimental results were obtained to validate the effect of the self- generated squeeze-film pressure on the stability...

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• Morphology of damage inflicted on brittle polymer in lubricated contact under cyclic static load

  Publication

  • T. Stolarski
  • P. Vongbandit

  - TRIBOLOGY LETTERS - Year 2011

  In this article morphology of damage inflicted on the polymethylmethacrylate (PMMA) plate in static point lubricated contact with a ball made of five different materials under cyclic normal load has been presented. It is argued that the counterface material and lubricating film play an important role in the damage process and the extent of damage inflicted in the PMMA plate.

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• Influence of surface roughness topography on properties of water lubricated polymer bearings, experimental research

  Publication

  • W. Litwin

  - TRIBOLOGY TRANSACTIONS - Year 2011

  W artykule przedstawiono wyniki badań eksperymentalnych, których celem było zidentyfikowanie wpływu ułożenia chropowatości na powierzchni ślizgowej łożyska smarowanego wodą z polimerową panwią. Badania wykazały, że wpływ ten jest mniejszy niż oczekiwano a na własności łożyska ma wpływ głównie wysokość chropowatości.

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• Acoustic journal bearing – Performance under various load and speed conditions speed conditions

  Publication

  • T. Stolarski
  • R. Gawarkiewicz
  • K. Tesch

  - TRIBOLOGY INTERNATIONAL - Year 2016

  The paper presents results of experimental testing aiming at finding out what effect system of piezo-electric actuators (PZTs)attached to an aerodynamic journal bearing has on the magnitude of shaft's motion within the bearing operating at specified speed and load. The results clearly demonstrate effectiveness of PZTs in mitigating the shaft's motion thus contributing to the increased stability of the bearing. This stabilizing...

• Evaluation of apparent Young׳s modulus of the composite polymer layers used as sliding surfaces in hydrodynamic thrust bearings

  Publication

  • M. Wodtke
  • M. Wasilczuk

  - TRIBOLOGY INTERNATIONAL - Year 2016

  Hydrodynamic bearings with a polymer sliding layer are able to operate in severe conditions, mainly due to favorable properties of the polymers. The goal of this research was to evaluate apparent Young׳s modulus of two types of the polymer composite layers used for sliding surfaces in hydrodynamic bearings, as a function of temperature. The Young׳s modulus was evaluated on the basis of compression tests carried out on samples obtained...

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• Experimental research on water lubricated three layer sliding bearing with lubrication grooves in the upper part of the bush and its comparison with a rubber bearing

  Publication

  • W. Litwin

  - TRIBOLOGY INTERNATIONAL - Year 2015

  composite. Eachofitslayershasanimportantfunction.Speciallypreparedslidingsurfaceensures minimum resistance.Followingrunning-initssmoothnessbecomesveryhighandthebearingmay continue workingunder fluid lubricationregime.NBRlayerensuresbearingelasticity,goodvibration damping propertiesandinsusceptibilitytoshaftaxismisalignment.Theexternalbrasslayermakes fitting thebearingeasier. Experiment resultsoftheconductedresearchwerecomparedwiththoseforarubberbearingof similar...

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• Peculiarities associated with testing polyetheretherketone (PEEK) in a model rolling contact

  Publication

  • T. Stolarski
  • R. Gawarkiewicz

  - TRIBOLOGY INTERNATIONAL - Year 2015

  Polyetheretherketone (PEEK) was investigated using a modified version of the four-ball tester in which the upper forth ball was replaced by a cone in such a way that kinematics of the four-ball configuration were fully preserved. Rotation of the cone enforced orbiting and rolling of the ceramic balls around the polymer cup. The results produced some unexpected peculiarities in the wear of ceramic balls which, in principle, should...

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• Centrally Pivoted Tilting Pad Thrust Bearing with Carbon-Based Coated Collar—Experimental Results of Low- and Medium-Speed Operation

  Publication

  • M. Wasilczuk
  • M. Wodtke
  • W. Braun

  - TRIBOLOGY TRANSACTIONS - Year 2015

  Experimental results of the research on a tilting pad thrust bearing with symmetrical pad support in the conditions of high loads and low speeds are presented in the paper. As described in the literature review, experimental results of tilting pad bearings at low speed/high load regime and transient conditions are rare. Unusual material selection - steel pad against a DLC-type coating on the collar was utilized. Such material combination...

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• Experimental research on water lubricated marine stern tube bearings in conditions of improper lubrication and cooling causing rapid bush wear

  Publication

  • W. Litwin
  • C. Dymarski

  - TRIBOLOGY INTERNATIONAL - Year 2016

  Water lubricated bearings are popular in sliding bearings of marine propeller shafts, turbines and pump shafts. Such popularity is partly due to their simple construction which also means a relatively affordable price. In practical experience one may also observe cases of rapid wear or even malfunctions of this bearings, some of which may be caused by insufficient flow of lubricant leading to overheating. The conducted...

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• Water-Lubricated Sintered Bronze Journal Bearings—Theoretical and Experimental Research

  Publication

  • W. Litwin
  • A. Olszewski

  - TRIBOLOGY TRANSACTIONS - Year 2014

  Water lubricated bearings are used from many years in shipbuilding, hydro power and other industries because of their advantages such as: extensive serviceable life, low coefficient of friction, longevity of shaft sleeve, good abrasion resistance, low maintenance required, unit simplicity, no danger of pollution and low price. Various types of water lubricated sliding bearings have been tested at the Technical University of Gdansk...

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