Results 91 to 100 of about 22,648 (230)

SPH Modelling of Hydrodynamic Lubrication along Rough Surfaces

open access: yesLubricants, 2019
Rough and textured surfaces are of paramount importance for lubrication, both in nature and in technology. While surface roughness relevantly influences both friction and wear, artificial surface texturing improves the performance of slider bearings as ...
Marco Paggi   +2 more
doaj   +1 more source

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

Elastic Deformation of Soft Coatings Due to Lubrication Forces

open access: yes, 2017
Elastic deformation of rigid materials with soft coatings (stratified materials) due to lubrication forces can also alter the interpretation of dynamic surface forces measurements and prevent contact formation between approaching surfaces.
Frechette, Joelle   +2 more
core   +1 more source

Dynamic simulation of an electrorheological fluid [PDF]

open access: yes, 1992
A molecular-dynamics-like method is presented for the simulation of a suspension of dielectric particles in a nonconductive solvent forming an electrorheological fluid.
Bonnecaze, R. T., Brady, J. F.
core   +1 more source

Static and Dynamic Analysis of Porous Gas Bearings Lubricated With Air, Refrigerant R‐134a, Helium and Hydrogen

open access: yesLubrication Science, EarlyView.
ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley   +1 more source

Characterization of Fuel Rods Supported by Dimple‐Less Spacer Grids and Subjected to Nonlinear Vibrations

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT An experimental campaign was undertaken to demonstrate the applicability of the Bouc–Wen hysteretic model to describe the hysteretic system of the recent Framatome dimple‐less spacer grid design for Pressurized Water Reactors. The experimental setup subjected a reduced‐length fuel rod, supported at both ends by dimple‐less grids, to forced ...
Giovanni Ferrari   +3 more
wiley   +1 more source

Modeling Fiber Dispersion in a Single‐Screw Extruder for Long Fiber‐Reinforced Thermoplastics

open access: yesPolymer Composites, EarlyView.
Fiber dispersion throughout the screw channel ABSTRACT Understanding the mechanics of fiber attrition during the plasticizing process is important in predicting the strength of long fiber‐reinforced thermoplastics (LFT) composites. Fiber dispersion has been found to impact fiber damage during processing and therefore final fiber length in the final ...
Hector Sebastian Perez   +4 more
wiley   +1 more source

MATHEMATICAL MODELING OF DYNAMICS MOVEMENT OF A PISTON SKIRT IN THE CYLINDER OF THE INTERNAL COMBUSTION ENGINE

open access: yesRUDN Journal of Engineering Research, 2017
There examined method theoretical research of sectional piston skirt hydrodynamic lubrication, and influence of piston and connection rod groups options on it.
S V Smirnov, A R Makarov, A A Vorobyev
doaj   +1 more source

In Vivo Microendoscopy in the Near‐Infrared II Window

open access: yesSmall, EarlyView.
NIR‐II microendoscopy with imaging wavelength extended to 1700 nm, enabling deep intestinal imaging beyond the mucosa and transrectal imaging at cellular resolution without any invasive surgery. It facilitates visualization of the relative motion of vascular networks, lymphatic drainage, and lesions in colitis models, opening new possibilities for ...
Zhisheng Wu   +14 more
wiley   +1 more source

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