Elastohydrodynamic Film Collapse During Rapid Deceleration. Part I—Experimental ResultsSource: Journal of Tribology:;2001:;volume( 123 ):;issue: 002::page 254DOI: 10.1115/1.1308011Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes a study of the behavior of elastohydrodynamic lubricated contacts subjected to rapid halting. Experiments have been carried out using ultrathin interferometry coupled to a high-speed camera to measure the change in lubricant film thickness and shape during fast, controlled deceleration, both in pure sliding and pure rolling conditions. Film collapse is seen to occur in two stages. The first persists throughout the deceleration period and, during this stage the film geometry remains almost constant across the contact. In this stage of film collapse, the film thickness lags behind the value predicted from steady-state theory, which means that when motion ceases, a thicker than expected film is present. The second stage of film collapse ensues when the entrainment speed falls below a critical value of approximately 0.002 m/s and is characterized by the formation of a central entrapment and classical, normal approach, squeeze behavior.
keyword(s): Lubricants , Electrohydrodynamics , Collapse , Film thickness , Motion , Steady state AND Interferometry ,
|
Collections
Show full item record
contributor author | R. P. Glovnea | |
contributor author | Research Associate | |
contributor author | H. A. Spikes | |
date accessioned | 2017-05-09T00:06:03Z | |
date available | 2017-05-09T00:06:03Z | |
date copyright | April, 2001 | |
date issued | 2001 | |
identifier issn | 0742-4787 | |
identifier other | JOTRE9-28696#254_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/125933 | |
description abstract | This paper describes a study of the behavior of elastohydrodynamic lubricated contacts subjected to rapid halting. Experiments have been carried out using ultrathin interferometry coupled to a high-speed camera to measure the change in lubricant film thickness and shape during fast, controlled deceleration, both in pure sliding and pure rolling conditions. Film collapse is seen to occur in two stages. The first persists throughout the deceleration period and, during this stage the film geometry remains almost constant across the contact. In this stage of film collapse, the film thickness lags behind the value predicted from steady-state theory, which means that when motion ceases, a thicker than expected film is present. The second stage of film collapse ensues when the entrainment speed falls below a critical value of approximately 0.002 m/s and is characterized by the formation of a central entrapment and classical, normal approach, squeeze behavior. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Elastohydrodynamic Film Collapse During Rapid Deceleration. Part I—Experimental Results | |
type | Journal Paper | |
journal volume | 123 | |
journal issue | 2 | |
journal title | Journal of Tribology | |
identifier doi | 10.1115/1.1308011 | |
journal fristpage | 254 | |
journal lastpage | 261 | |
identifier eissn | 1528-8897 | |
keywords | Lubricants | |
keywords | Electrohydrodynamics | |
keywords | Collapse | |
keywords | Film thickness | |
keywords | Motion | |
keywords | Steady state AND Interferometry | |
tree | Journal of Tribology:;2001:;volume( 123 ):;issue: 002 | |
contenttype | Fulltext |