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    Thermal EHL Analysis of Circular Contacts With Measured Surface Roughness

    Source: Journal of Tribology:;1996:;volume( 118 ):;issue: 003::page 473
    Author:
    Gang Xu
    ,
    Farshid Sadeghi
    DOI: 10.1115/1.2831560
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Time dependent thermal EHL circular contact results with measured surface roughness were obtained to analyze the effects of roughness on pressure, film thickness, temperature, and coefficient of friction. Both contact surfaces are considered to be rough. Multilevel multigrid techniques (with multigrid integration) were used to solve the system of two dimensional Reynolds, elasticity and three dimensional energy equations simultaneously. The effects of surface roughness under various loads, speeds, and slip conditions have been studied. Surface roughness causes pressure and temperature spikes and increases the coefficient of friction, and surface roughness flattens due to the high pressure in EHL contact. The higher the load, speed and slide to roll ratio, the more significant the effect of the surface roughness. A comparison between rough EHL and smooth EHL results indicates that surface roughness cannot be ignored in EHL analysis.
    keyword(s): Surface roughness , Stress , Pressure , Friction , Temperature , Elasticity , High pressure (Physics) , Equations AND Film thickness ,
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      Thermal EHL Analysis of Circular Contacts With Measured Surface Roughness

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    http://yetl.yabesh.ir/yetl1/handle/yetl/117683
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    • Journal of Tribology

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    contributor authorGang Xu
    contributor authorFarshid Sadeghi
    date accessioned2017-05-08T23:51:39Z
    date available2017-05-08T23:51:39Z
    date copyrightJuly, 1996
    date issued1996
    identifier issn0742-4787
    identifier otherJOTRE9-28520#473_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/117683
    description abstractTime dependent thermal EHL circular contact results with measured surface roughness were obtained to analyze the effects of roughness on pressure, film thickness, temperature, and coefficient of friction. Both contact surfaces are considered to be rough. Multilevel multigrid techniques (with multigrid integration) were used to solve the system of two dimensional Reynolds, elasticity and three dimensional energy equations simultaneously. The effects of surface roughness under various loads, speeds, and slip conditions have been studied. Surface roughness causes pressure and temperature spikes and increases the coefficient of friction, and surface roughness flattens due to the high pressure in EHL contact. The higher the load, speed and slide to roll ratio, the more significant the effect of the surface roughness. A comparison between rough EHL and smooth EHL results indicates that surface roughness cannot be ignored in EHL analysis.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThermal EHL Analysis of Circular Contacts With Measured Surface Roughness
    typeJournal Paper
    journal volume118
    journal issue3
    journal titleJournal of Tribology
    identifier doi10.1115/1.2831560
    journal fristpage473
    journal lastpage482
    identifier eissn1528-8897
    keywordsSurface roughness
    keywordsStress
    keywordsPressure
    keywordsFriction
    keywordsTemperature
    keywordsElasticity
    keywordsHigh pressure (Physics)
    keywordsEquations AND Film thickness
    treeJournal of Tribology:;1996:;volume( 118 ):;issue: 003
    contenttypeFulltext
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