Results 41 to 50 of about 54,709 (142)

Velocity dependence of joint friction in robotic manipulators with gear transmissions [PDF]

open access: yes, 2005
This paper analyses the problem of modelling joint friction in robotic manipulators with gear transmissions at joint velocities varying from close to zero until their maximum appearing values.
Aarts, Ronald, Jonker, Ben, Waiboer, Rob
core   +2 more sources

Forcing function control of Faraday wave instabilities in viscous shallow fluids

open access: yes, 2005
We investigate the relationship between the linear surface wave instabilities of a shallow viscous fluid layer and the shape of the periodic, parametric-forcing function (describing the vertical acceleration of the fluid container) that excites them.
A. Messiah   +6 more
core   +1 more source

Investigating the Effect of Water Contamination on Gearbox Lubrication based on Motor Control Data from a Sensorless Drive [PDF]

open access: yes, 2014
Water is one of the most significant destructive contaminations to lubricants which in turn lead to more power consumption and early damage to rotating machines.
Abusaad, Samieh   +4 more
core  

Boundary lubrication: Revisited [PDF]

open access: yes
A review of the various lubrication regimes, with particular, emphasis on boundary lubrication, is presented. The types of wear debris and extent of surface damage is illustrated for each regime.
Jones, W. R., Jr.
core   +1 more source

Resolved simulations of submarine avalanches with a simple soft-sphere / immersed boundary method [PDF]

open access: yes, 2013
Physical mechanisms at the origin of the transport of solid particles in a fluid are still a matter of debate in the physics community. Yet, it is well known that these processes play a fundamental role in many natural configurations, such submarines ...
Bonometti, Thomas   +2 more
core  

Mixed Lubrication of Coupled Journal-Thrust Bearing Systems

open access: yesComputer Modeling in Engineering & Sciences, 2002
Many mechanisms, such as computer hard drives, gear trains, and machine tool spindle systems, operate under both axial and radial loads, which should be respectively supported by a thrust and a journal bearing. By utilizing the end face of the shaft of a journal bearing as a thrust bearing, a coupled journal-thrust bearing system can be formed.
Wang, Yansong, Wang, Q. Jane, Lin, Chih
openaire   +2 more sources

Boulder transport under mixed-lubrication friction

open access: yesEuropean Journal of Mechanics - B/Fluids
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
J. DuBerry-Mahon, J.G. Herterich
openaire   +1 more source

Ciliary propulsion of objects in tubes: wall drag on swimming Tetrahymena (Ciliata) in the presence of mucin and other long-chain polymers [PDF]

open access: yes, 1976
The lubrication effect of three long-chain polymers - mucin, methylcellulose and Ficoll - on ciliary propulsion in tubes is measured by plotting the relative velocities of swimming cilitates as a function of the tube bore diameter.
Winet, H.
core  

Lubricant effects on bearing life [PDF]

open access: yes
Lubricant considerations for rolling-element bearings have within the last two decades taken on added importance in the design and operation of mechanical systems.
Zaretsky, Erwin V.
core   +1 more source

Chemistry: Space resources for teachers including suggestions for classroom activities and laboratory experiments [PDF]

open access: yes, 1971
Curriculum supplement to assist general chemistry teachers in updating instruction materials with aerospace ...
Bowman, W. H., Lawrence, R. M.
core   +1 more source

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