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Industrial Gear Oils from Renegerable Feed Stocks
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The aim of this research study is to obtain industrial gear oils. The formulation of this type of lubricant is based on vegetable oils or mixtures of vegetable oils with more stable base oils and appropriate additives. The ...
The Influence of the Applied Load on the Friction Coefficient of the Sintered Iron-Base Bearings
(Universitatea ”Dunărea de Jos” din Galați, 2008)
In the recent years the iron base sintered bearings production was considerable increased at the expense of the copper based ones, due to the low cost and availability of the iron powders as well as the higher strength. ...
Influence of the Sliding Speed on the Elastohydrodynamic Regime
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The study of the elastohydrodynamic (EHD) lubrication regime is characterristic for the heavily loaded gears and can be modeled on a two disk (SAE) rig. It is very important to observe and determine the lubrication regime ...
The Effect of Wiberg Angle on the Contact Pressure Pistribution in Natural and Artficial Joint
(Universitatea ”Dunărea de Jos” din Galați, 2008)
The analogies and differences between the mechanical joints and the biological ones, in the presence of relative motion, are based on the pressure distribution. The paper analysed a numerical model of the pressure distribution ...
Nitrogen Influence on Indentation Fracture Toughness of Stainless Steel Coatings
(Universitatea ”Dunărea de Jos” din Galați, 2008)
This paper studies some aspects of coatings fracture theory and the possibility of extending Lawn’s equation from Vickers indenter geometry to the Rockwell one. Indentation tests were performed on stainless steel coatings ...