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Afișează articolele 951-960 of 1945
The Influence of Biodiesel Fuels on Lubricity of Passenger Car Diesel Engine Oils
(UDJG, 2010)
The present paper mainly focuses on the physical and chemical impact of currently used and future biodiesel components on the performance of a typical low-sulphated-ash-phosphorus-sulphur (low SAPS) passenger car engine ...
Modelling of Some Degradation Processes by Corrosion Fatigue of Metallic Surfaces
(UDJG, 2011)
Based on the well known fatigue corrosion effects, the mechanical stress and the corrosive environment have a significant effect on the prediction of the lifespan of the equipments that work in corrosive environment, two ...
Characteristics of Material in Zone of Cut by Laser Cutting
(UDJG, 2010)
The laser cutting is a cost effective technology. This process is based on melting and evaporating material in very small, a well-defined area and a blownout of the cut by the assist gas. Laser cutting processes make heat ...
Numerical Modelling of 3D Impact
(UDJG, 2010)
The paper presents a virtual device designed for studying tri-dimensional impact. The main goal of the work is to present a solution for finding the coefficient of restitution for the tri-dimensional case of a sphere ...
Kinematic and Dynamic Aspects of Damped Collision Between Two Metallic Balls
(UDJG, 2011)
Recently, a new model of the behaviour of a collision has been proposed by Flores. The model describes the behaviour during the impact of a complete range of metallic materials, from the soft to the hard ones. The present ...
The Presence of Hydrogen as Wear Environment for the Mechanical System of the Continuous Casting Equipment
(UDJG, 2010)
In the last years the continuous casting of the steel has a tremendous development. In the same time, the casting steel quality requirements become higher. The hydrogen as environment of the casting diminishes the steel ...
Multipurpose Ecological Lubricating Greases
(UDJG, 2010)
Lubricants facilitate the effective operation of mechanical equipment, reducing friction and wear, but, in the same time, they are a large and diffuse pollution source, both on soil and in water. Eliminating or reducing ...
The Application of CRN Coating in Sliding Pairs under Lubrication Conditions
(UDJG, 2011)
This work revealed the results of the impact of the formed surface layer CrN and the surfaces layer CrN-steel 46Cr2 “ring” structure. The sliding pairs worked under conditions of lubricating the friction area with Lotos ...
The Influence of Nano-Particle Additive to Lubricating Oils on the Structure and Properties of Friction Surfaces
(UDJG, 2011)
The article considers the influence of the additive in the lubricating oils Cermet, on tribological properties of a friction pair «cast iron – chrome», which is typical for the cylinder-piston unit of engines. It is shown ...
Theoretical Evaluation and Experimental Measuring of the Friction Forces from the Sealing of the Rod for the Hydraulic Cylinders
(UDJG, 2011)
The paper presents some technical problems specific to the mobile sealing, used in the construction of hydraulic cylinders, and the theoretical and experimental methods which allow to determine the friction forces which ...