Transactions of the ASME . Journal of tribology, Vol. 130 n°2. Journal of tribology :Transactions of the ASME - Mars/Avril 2008
| Titre : | Transactions of the ASME . Journal of tribology, Vol. 130 n°2. Journal of tribology :Transactions of the ASME - Mars/Avril 2008 |
| Type de document : | Bulletin |
| Paru le : | 15/07/2008 |
Dépouillements
Article : texte imprimé
M. Saint Raymond, Auteur ;
M. E. Kasarda, Auteur ;
P. E. Allaire, Auteur
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Rotors supported by active magnetic bearings (AMBs) can spin at high surface speeds with relatively low power losses. This makes them particularly attractive for use in flywheels for energy storage in applications such as electric vehicles and u[...]
Article : texte imprimé
Antti Kärkkäinen, Auteur ;
Marlene Helfert, Auteur ;
Beat Aeschlimann, Auteur
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Active magnetic bearings present a technology that has many advantages compared to traditional bearing concepts. Active magnetic bearings, however, require retainer bearings in order to prevent damages in the event of a component, power, or a co[...]
Article : texte imprimé
G. Belforte, Auteur ;
F. Colombo, Auteur ;
T. Raparelli, Auteur
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A test bench for rotors supported by air bearings floating on O-rings is designed in order to study the whirl phenomenon and characterize the stability threshold with damping elements mounted on bearings. The work includes a description of the t[...]
Article : texte imprimé
R. W. Snidle, Auteur ;
A. K. Dhulipalla, Auteur ;
H. P. Evans, Auteur
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Scuffing experiments were conducted using 76mm diameter disks both with and without a metal-containing, carbon-based hard coating. The operating conditions in the experiments were severe with sliding speeds up to 16m∕s and maximum Hertzian conta[...]
Article : texte imprimé
Karim N. Elkholy, Auteur ;
M. M. Khonsari, Auteur
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An investigation on the nature of stick-slip associated with granular materials sheared between two parallel disks within the context of granular lubrication is presented. Experiments are carried out in an annular shear cell apparatus to demonst[...]
Article : texte imprimé
Antoszewski Bogdan, Auteur ;
Levi, Emil, Auteur ;
Audy Jaromír, Auteur
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Recent advances in the commercial exploitation of electrospark coatings have focused on improving surface roughness by depositing Ti, Mo, V, or W over an interlayer of Cu, Sn, Pb, or Cd on the top of a tool steel material. This paper presents re[...]
Article : texte imprimé
A. Ovcharenko, Auteur ;
G. Halperin, Auteur ;
I. Etsion, Auteur
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The elastic-plastic contact between a deformable sphere and a rigid flat during presliding is studied experimentally. Measurements of friction force and contact area are done in real time along with an accurate identification of the instant of s[...]
Article : texte imprimé
Ling He, Auteur ;
Timothy C. Ovaert, Auteur
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By applying the line integral of Barnett–Lothe tensors on oblique planes, the three-dimensional rough surface contact problem for a semi-infinite anisotropic elastic half-plane in contact with a rough rigid sphere is formulated. The conjugate gr[...]
Article : texte imprimé
W. Habchi, Auteur ;
D. Eyheramendy, Auteur ;
P. Vergne, Auteur
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The solution of the elastohydrodynamic lubrication (EHL) problem involves the simultaneous resolution of the hydrodynamic (Reynolds equation) and elastic problems (elastic deformation of the contacting surfaces). Up to now, most of the numerical[...]
Article : texte imprimé
Yuchuan Liu, Auteur ;
Q. Jane Wang, Auteur ;
Ivan Krupka, Auteur
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Lubricant base oils are often blends of different molecular weight cuts to arrive at a specified ambient pressure viscosity and, to improve the temperature-viscosity behavior or to simply increase the viscosity, viscosity-modifying polymer addit[...]
Article : texte imprimé
S. Akbarzadeh, Auteur ;
M. M. Khonsari, Auteur
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A model is developed for predicting the performance of spur gears with provision for surface roughness. For each point along the line of action, the contact of pinion and gear is replaced by that of two cylinders. The radii of cylinders, transmi[...]
Article : texte imprimé
A. Maoui, Auteur ;
M. Hajjam, Auteur ;
D. Bonneau, Auteur
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This work is a numerical analysis of the thermal effect on the elastohydrodynamic behavior of elastomer radial lip seals. Two thermal approaches are considered, a local approach that determines the distribution of temperature in the contact zone[...]
Article : texte imprimé
Jian W. Choo, Auteur ;
Andrew V. Olver, Auteur ;
Hugh A. Spikes, Auteur
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A novel experimental method has been developed to investigate how model asperities, on opposing surfaces in an elastohydrodynamic (EHD) contact, interact to influence the lubricant film distribution. This technique allows direct measurements of [...]
Article : texte imprimé
R. I. Raja Hamzah, Auteur ;
Khamis R. Al-Balushi, Auteur ;
D. Mba, Auteur
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This paper presents experimental findings on the generation of acoustic emission (AE) from operational spur and helical gears as a function of specific film thickness (λ). The latter was varied while the gears were operating by spraying liquid n[...]
Article : texte imprimé
M. A. Mohamed, Auteur
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Addressed is the mechanism of finishing processes for a workpiece surface using hard abrasive tools such as grinding, abrasive paper, and filing. The mechanism is intended to monitor the gradual changes of the workpiece surface state roughness a[...]
Article : texte imprimé
Niyazi Ozdemir, Auteur ;
Furkan Sarsilmaz, Auteur ;
Nuri Orhan, Auteur
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In this study, the abrasive wear behavior of a grain refined hypereutectoid carbon steel containing 1.2% C, 4% Al, 0.20% Mo, and 0.1% Ti was investigated experimentally. Thermal cycles were applied to all specimens about ten times to obtain a fi[...]
Article : texte imprimé
Dedy Ng, Auteur ;
Hong Liang, Auteur
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This research investigates the interfacial forces involved in tribological interactions while removing nanosized particles during post-chemical-mechanical polishing cleaning. Surface and interfacial forces are discussed to understand the particl[...]
Article : texte imprimé
Samuel Cupillard, Auteur ;
Cervantes, Michel J., Auteur ;
Sergei Glavatskih, Auteur
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A flow analysis is carried out for an inclined slider bearing with the aim of showing the governing mechanism at conditions where an optimum in load carrying capacity is achieved. The effects of surface texture on pressure buildup and load carry[...]
Article : texte imprimé
Xiaobin Lu, Auteur ;
M. M. Khonsari, Auteur
|
A distinctive behavior of an oil-lubricated journal bearing undergoing oscillatory motion is the evolution of friction hysteresis as it traverses from boundary, to mixed, and to hydrodynamic regime. In this paper, the results of a series of expe[...]
Article : texte imprimé
Coda H. Pan, Auteur ;
Tae Ho Kim, Auteur ;
Joseph J. Rencis, Auteur
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The rolling stream trail (RST) model introduces a new formulation of cavitation analysis of an eccentric journal bearing; it is presented as a preferred foundation for cavitation analysis of a journal bearing to replace Floberg’s streamer hypoth[...]
Article : texte imprimé
Gracious Ngaile, Auteur ;
Frank Botz, Auteur
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Although water/oil-graphite emulsions are widely used in warm forging processes, they carry environmental concerns. In an attempt to replace graphite-based lubricants in warm forging of aluminum alloys, two variants of boron-nitride-silicone lub[...]
Article : texte imprimé
M. T. van Zoelen, Auteur ;
C. H. Venner,, Auteur ;
P. M. Lugt, Auteur
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In this paper, the effects of rotation on the distribution of a layer of oil on a bearing raceway are analyzed in relation to the geometry of the raceway. The research is motivated by the need to understand the behavior of grease lubricated bear[...]
Article : texte imprimé
Xi Shi, Auteur ;
Andreas A. Polycarpou, Auteur
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As the areal density of magnetic disk storage continues to increase and head-disk spacing decreases, contact between the recording slider and the rotating media becomes imminent. In order to predict contact forces, fly-height modulations, and of[...]
Article : texte imprimé
Sung-Chang Lee, Auteur ;
Brian D. Strom, Auteur
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The effect of thermomechanically actuated pole tip protrusion on adhesive forces is characterized through model and experiment. The roughness of a thermomechanically actuated region is characterized by atomic force microscopy. Using the extracte[...]
Article : texte imprimé
Susumu Ogata, Auteur ;
Hedong Zhang, Auteur ;
Kenji Fukuzawa, Auteur
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Using a coarse-grained molecular dynamics simulation based on the bead-spring polymer model, we reproduced the film distribution of molecularly thin lubricant films with polar end groups coated on the disk surface and quantified the film-surface[...]
Article : texte imprimé
J. Y. Jang, Auteur ;
M. M. Khonsari, Auteur ;
Scott Bair, Auteur
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Article : texte imprimé
K. Willner, Auteur
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In a recent paper (2004, “Elasto-Plastic Normal Contact of Three-Dimensional Fractal Surfaces Using Halfspace Theory ,” J. Tribol., 126, pp. 28–33) the author developed a halfspace model for the elasto-plastic normal contact of rough surfaces. [...]
Article : texte imprimé
P. Singh, Auteur ;
R. K. Pandey, Auteur ;
Nath, Y., Auteur
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The main objective of this research is to analyze the variation of minimum film thickness in the inlet zone of roll-strip interface by incorporating starvation and viscous shear heating effects at high rolling speeds (5–20m∕s), reduction ratios [...]
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