Evidence of Plug Flow in Rolling–Sliding Elastohydrodynamic Contact

The existence of shear bands, boundary slippage or shear localization was observed several times by various researchers. At the same time, the concept of limiting shear stress is almost exclusively used for traction modeling without clear explanation of physical phenomena that it is associated with....

Full description

Saved in:
Bibliographic Details
Published in:Tribology letters 2014-05, Vol.54 (2), p.151-160
Main Authors: Šperka, P., Křupka, I., Hartl, M.
Format: Article
Language:English
Subjects:
Boundaries
Chemistry and Materials Science
Contact
Corrosion and Coatings
Edge dislocations
Elastohydrodynamics
Entrainment
Localization
Materials Science
Nanotechnology
Original Paper
Physical Chemistry
Plug flow
Shear bands
Shear localization
Shear stress
Shear zone
Sliding
Slippage
Surfaces and Interfaces
Theoretical and Applied Mechanics
Thin Films
Traction
Tribology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The existence of shear bands, boundary slippage or shear localization was observed several times by various researchers. At the same time, the concept of limiting shear stress is almost exclusively used for traction modeling without clear explanation of physical phenomena that it is associated with. Despite it, the classic linear distribution of speed through-film profile is often considered in current numerical analyses and in our thinking about experimental results. It seems there is a small effort to unify our approaches to meet general concept that can explain a wide range of phenomena. This paper presents experimental results that point out on irregular distribution of through-film speed profile. The observations show an existence of cohesive core of entrainment speed surrounded by two shear zones located closely to the surfaces. This result represents experimental evidence for plug flow mechanism in highly loaded rolling–sliding elastohydrodynamic contact. Possible mechanisms of shear localization are discussed.
ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-014-0320-5