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Afișează articolele 881-890 of 1945
Bending of Thin Walled Pipes Using the Heat Realised by Friction
(Universitatea ”Dunărea de Jos” din Galați, 2006)
This paper considers appliance of heat generated by friction to relieve deformation of light metals, having as example of bending thin walled copper pipes. Based on numerous, primarily experiment analysis the conclusions ...
Singular Points in an Elastic Half-Plane Containing a Circular Hole, Loaded by a Normal Point Force on the Straight Boundary
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
These authors published theoretical results upon the stress state induced in an
elastic half-plane containing a circular hole by a point force applied on its
boundary. The solutions were found in bipolar co-ordinates and ...
Interaction Between Two Unequal Circular Holes Lying in a Sheared Elastic Plane
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
The paper presents an analytic solution for the stress states in an elastic plan
where two unequal circular holes are lying. At infinity, the elastic plane is sheared.
To solve the problem, the authors used bipolar ...
Optimisation of the Tooth Flank Geometry for Non-Standard Spur gear
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
In order to increase the transmissible power level of the plastic spur gears, a
non-standard tooth is designed, with a variable geometry along the gear facewidth.
The variation of the tooth flank geometry, generated by ...
Flammability Tests on Hot Surfaces for Industrial Fluids
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
Industrial fluids have to be evaluated not only for their performances as load capacity, durability, but also for their potential risk including ignition. Based on a solid documentation the authors point out the significance ...
Structured Surfaces used for Improving Tribological Behaviour for the Piston – Ring Cylinder – Liner Friction Couples in Internal Combustion Engines
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
Structured surfaces means the achievement of a rate, or controlled micro-geometry for one or both friction surfaces. These surface profiles are used to guarantee lubrication functions of transport, hoarding and spread of ...
On Kerosene Lubrication of Hybrid Ball Bearings
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
The hybrid ball bearings with silicon nitride balls are employed in special applications, e.g. high-speed machine tools and aeronautics. The kerosene can be used not only as a fuel for the jet engine, but also as lubricant ...
Research about Roughness resulted at Steel Turning and the Correlation with Piece Surability
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
For achieving this study the background of the research in correlation domain between roughness and piece durability are used. This paper performs a new research direction about the roughness, considered such volumetric ...
The Resulted Roughness at Turning of some Non-Metallic Materials and Correlation with Durability of Machine Cut Surfaces
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
In this paper there are studied the results obtained at graphite and polyvinyl chloride turning. Such pieces are used like loose parts or in subassemblies. The final roughness of such pieces after processing and the influence ...
Influence of Grease Grade and Working Regime on the Structural Modifications of the Superficial Layers on Roller-Roller Tribosystems
(Universitatea "Dunărea de Jos" din Galaţi, 2007)
A X-ray diffractometric method is used for analysing the distributions of the 1-st and 2-nd tension state and dislocation density in the superficial layers, after tests in different working and lubricating conditions, the ...