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Afișează articolele 281-290 of 1945
On Tribological Behaviour of Thermo-Chemical Treated Steels after Thermo-Magnetic Treatments
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The paper presents an analysis on two grades of steel, subjected to nitrocarburized or nitrided thermo-chemical treatment after different thermomagnetic treatments. Based on the concept of tribosystem, pairs of steel rollers ...
Some Aspects about Driving Wheel/Rail Contact in Steady State Interaction
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The driving wheel/rail steady state interaction and the response to harmonic excitation were studied using a complex model for track. The starting point for numerical simulations is the Green matrix of the track. The ...
Experimental Investigations Concerning the Mathematical Model of Hard Deposits by High-Speed Flame Spraying
(Universitatea ”Dunărea de Jos” din Galați, 2008)
A complex study was done by the paper’s authors using some independent models that take into account the combustion process, the particles’ dynamics, the fluid dynamics and also the particle fluid transfer processes when ...
Experiences in Lubrication of non-Natural Gas Fuelled Stationary Engines
(Universitatea ”Dunărea de Jos” din Galați, 2008)
In Europe, a huge number of generators for electric power, powered by those stationary engines are becoming increasingly popular in regions where these renewable fuel sources are available. Nevertheless, the continuously ...
High-Speed Hybrid Angular Contact Ball Bearings Lubricated by Kerosene Mist
(Universitatea ”Dunărea de Jos” din Galați, 2008)
This paper presents some experimental research, carried-out on 7206C hybrid angular contact ball bearings lubricated by oil and kerosene mist. The monitored parameters are the friction moment of the testing bearing, and ...
Hip Joint Contact Pressure Distribution Pand After Triple Osteotomy
(Universitatea ”Dunărea de Jos” din Galați, 2008)
A 3−D reconstruction method based on CT scans was used to compute the femoral head coverage for dysplasic hips prior and after reconstruction surgery. The triple osteotomy technique was used to “reorient” the acetabulum ...
Experimental Study on Roughness Parameters Variation, During Running – in Period, for a Cylinder-Plane Friction Couple
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The studies of various lubrication problems have been recently focused on atypical geometrical and operating conditions (extreme conditions). Among these cases, one can find analyses of HD bearings having surface macroscopic ...
Test-Rig for Pressure Measurements in an Aerostatic Bearing
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The paper presents a test rig for local pressure investigation in an aerostatic or gasostatic bearing system. Using a simple and performant computer assisted measurement device, pressure evolution in lubrication area can ...
Influence of Sliding Speed and Average Pressure in Dry Regim Upon Wear of Composite with PA and Micro Glass Spheres
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The papers presents the wear results of testing a set of composites PA + 1% black carbon + x% micro glass spheres, where x is the micro glass sphere concentration (x=0, 5, 10, 20, 30wt) using a pin-on-disc tribotester, for ...
Principles and Methodologic Peculiarities in the Research of the Tribosystem with Sliding on Translation Cyclic Movement
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The work presents methodological aspects of behavior research in the cyclical slip tribosystems regarding the dynamics of contact processes. Taking into account the fact that in the contact, processes of various origins ...