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Failure of a Total Knee Prosthesis Tibial Tray Due to the Fatigue Wear
(Universitatea ”Dunărea de Jos” din Galați, 2006)
Some studies report the failure of a tibial insert of knee prostheses due to the subsurface cracking and delamination wear [1]. The present study starts by analysing retrieved total knee prosthesis revealing the loss of a ...
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 ...
A Preliminary Study on the Dynamics of Triboemission, Work Function and Surface Charging of Ceramics
(Universitatea ”Dunărea de Jos” din Galați, 2006)
This paper discusses the tribological dynamics of electron triboemission and after-contact emission during scratching of ceramics. The origin of such triboemission is still unclear, but the author and colleagues consistently ...
Etablissement de L’angle Maximum de Pivotement pour un Rouleau Cylindrique d’un Roulement a Quatre Epaulements de Guidage
(Universitatea ”Dunărea de Jos” din Galați, 2006)
In cylindrical roller bearings subjected to complex radial and axial load, there is always a skew motion of rollers. This parasite motion increases the total friction loss within the bearings, restricting their running ...
Tribological Behaviour of CO-CR-MO and Uhmwpe the Components of Intervertebral Disc Prosthesis
(Universitatea ”Dunărea de Jos” din Galați, 2006)
The Intervertebral Disc Prostheses consist of a modular system and his function is based on low intervertebral friction. As a result of friction forces acting to the spine structures, the intervetebral disc prostheses can ...
Some Special Features of the Elastic-Plastic Deformation of the Composite Electrolytic Platings
(Universitatea ”Dunărea de Jos” din Galați, 2006)
One brings the elastic particularises and figures of the deformation of composition of the iron-nickel and iron hedging’s to the micropression. This information makes it possible to explain the mechanism elastic and plastic ...
A New Trend for Preparating Polymeric Calcium Sulfonates for Metal Working Fluids by Phase Transfer Catalysis. Part I.
(Universitatea ”Dunărea de Jos” din Galați, 2006)
Calcium sulfonates derived from sulfonation of heavy alkylate and aromatic extract were synthesized and reacted with formalin to produce anionic polymer in the presence of phase transfer catalysts (PTC). These catalysis ...
Researches of Distribution of Loading on Coils of Running Pair of the Latch
(Universitatea ”Dunărea de Jos” din Galați, 2006)
This paper gives the calculation procedure of pressure distribution on coils of running pair of latch at various loading schemes. Recommendations are provided for the choice of loading schemes of running pair, which ensure ...
Analysis of Wear Cutting Tools by Complex Powerexponential Function for Finishing Turning of the Hardened Steel 20CRMO5 by Mixed Ceramic Tools
(Universitatea "Dunărea de Jos" din Galaţi, 2006)
In this paper it is analised the dependence regression between flank wear tools or
wear out of belt width on the back surface VB and cutting time t in the form of
complex power-exponential regression equation for turning ...
Hysteresis and Mechanical Fatigue
(Universitatea ”Dunărea de Jos” din Galați, 2006)
The material dumping, known also as inner friction or, simply hysteresis, is considered to be related to energy dissipation in the volume of a macro-continuous medium. This phenomenon takes place when a more or less ...