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Statements

Subject Item
n2:RIV%2F00216305%3A26210%2F13%3APU106128%21RIV14-MSM-26210___
rdf:type
skos:Concept n14:Vysledek
dcterms:description
The low-shear viscosities of new oil and used (degraded) oil were measured to moderately high pressure. Shear-thinning flow curves were generated over a range of shear stress important to EHL film forming. Mechanical shear degradation only affected the viscosity at low shear stress while the viscosity at high stress remained unchanged. A recently published film thickness equation for double-Newtonian shear-thinning, employing the measured rheology, predicts the surprising result that thickness of the EHL film was not changed by the degradation although the low-shear viscosities were reduced substantially. Colorimetric measurements of the film thicknesses validate the predictions. Concern over the permanent loss in viscosity due to degradation may be misplaced when addressing EHL films. The low-shear viscosities of new oil and used (degraded) oil were measured to moderately high pressure. Shear-thinning flow curves were generated over a range of shear stress important to EHL film forming. Mechanical shear degradation only affected the viscosity at low shear stress while the viscosity at high stress remained unchanged. A recently published film thickness equation for double-Newtonian shear-thinning, employing the measured rheology, predicts the surprising result that thickness of the EHL film was not changed by the degradation although the low-shear viscosities were reduced substantially. Colorimetric measurements of the film thicknesses validate the predictions. Concern over the permanent loss in viscosity due to degradation may be misplaced when addressing EHL films.
dcterms:title
Quantitative elastohydrodynamic film thickness of mechanically degraded oil Quantitative elastohydrodynamic film thickness of mechanically degraded oil
skos:prefLabel
Quantitative elastohydrodynamic film thickness of mechanically degraded oil Quantitative elastohydrodynamic film thickness of mechanically degraded oil
skos:notation
RIV/00216305:26210/13:PU106128!RIV14-MSM-26210___
n14:predkladatel
n15:orjk%3A26210
n3:aktivita
n18:P
n3:aktivity
P(LH11002)
n3:cisloPeriodika
8
n3:dodaniDat
n8:2014
n3:domaciTvurceVysledku
n10:2728281 n10:8892822 n10:7016514
n3:druhVysledku
n16:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
101208
n3:idVysledku
RIV/00216305:26210/13:PU106128
n3:jazykVysledku
n4:eng
n3:klicovaSlova
Viscosity modifier, High pressure rheology, EHL film thickness, Mechanical shear degradation
n3:klicoveSlovo
n6:Mechanical%20shear%20degradation n6:EHL%20film%20thickness n6:Viscosity%20modifier n6:High%20pressure%20rheology
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[16FF1A0E9229]
n3:nazevZdroje
Tribology International
n3:obor
n12:JR
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n9:LH11002
n3:rokUplatneniVysledku
n8:2013
n3:svazekPeriodika
65
n3:tvurceVysledku
Hartl, Martin Šperka, Petr Křupka, Ivan
s:issn
0301-679X
s:numberOfPages
6
n11:organizacniJednotka
26210