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Observations in transiently loaded EHL contacts under pure sliding conditions
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0001-9110-2819
1998 (engelsk)Inngår i: Tribology Transactions, ISSN 1040-2004, E-ISSN 1547-397X, Vol. 41, nr 4, s. 489-496Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An elastohydrodynamically lubricated contact is experimentally investigated during loading and pure sliding motion. This is a combination of motions where lubricant film failures sometimes occur. The experimental setup consists of a 70-mm diam. ball segment mounted on a pendulum. The ball segment can be rotated while it impacts a lubricated glass disc. The deformation of the surfaces in the contact region is studied by means of optical interferometry and high-speed video recording equipment. Two poly-α-olefin-type lubricants with viscosities of 94 and 2600 mm2/s are used in the experiments. The squeeze velocity, i.e., the normal approach velocity, is approximately 0.06 m/s, giving an impact time of about 20 ms. The sliding velocity is varied from 0 to 34 m/s. Some of the observed phenomena are that lubricant film breakdown occurs at high sliding velocities while full film is maintained at no or low sliding velocity and that the traditional horseshoe-shaped fringes are found even for this load situation. At very high sliding velocities, the interferograms are distorted from their normal circular shape to a pear-like shape. (

sted, utgiver, år, opplag, sider
1998. Vol. 41, nr 4, s. 489-496
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URN: urn:nbn:se:ltu:diva-11070DOI: 10.1080/10402009808983773ISI: 000077225200009Scopus ID: 2-s2.0-0032194483Lokal ID: 9fa88050-c0b7-11db-834c-000ea68e967bOAI: oai:DiVA.org:ltu-11070DiVA, id: diva2:984019
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Godkänd; 1998; 20070217 (rola)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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