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Investigation of Frictional Properties of Lubricants at Transient EHD-Conditions
2001 (English)In: Bench testing of industrial fluid lubrication and wear properties used in machinery applications: papers presented at the Symposium on Bench Testing of the Lubrication and Wear Properties of Industrial Fluids Used in Machinery Application held in Seattle, Washington in 26 - 27 June 2000 / [ed] George E. Totten, West Conshohocken, Pa: ASTM International, 2001, p. 221-234Conference paper, Published paper (Refereed)
Abstract [en]

In assessment of lubricant properties and in various contact applications, it is of importance to know the frictional qualities. Under quasi-static conditions, normal and transverse forces are measured using force transducers, but the task is more difficult when loads are high and transient as they often are in elastohydrodynamic conjunctions. The experimental method presented in this paper is based on analysis of propagating waves in a beam, due to an impact on its end surface, using FFT analysis. Since the impact is oblique, both non-dispersive compression waves and dispersive flexural waves are generated. The normal force originating from the axial wave is measured using strain gauges, while the transverse force is derived from the FFT's of two lateral acceleration histories using Timoshenko dynamic beam theory. The relation between normal and tangential force histories displays the frictional properties at the impact as a function of time; i.e., variations in frictional properties during loading and unloading (typically 200 400 s in ball bearings and gears) can be observed. A variety of lubricants has been studied up to a Hertzian pressure of 2.5 GPa, and the method and results are presented

Place, publisher, year, edition, pages
West Conshohocken, Pa: ASTM International, 2001. p. 221-234
Series
ASTM Special Technical Publication, ISSN 0066-0558 ; 1404
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-29927DOI: 10.1520/STP10511SLocal ID: 38e687e0-bafc-11dd-b223-000ea68e967bISBN: 0-8031-2867-3 (print)OAI: oai:DiVA.org:ltu-29927DiVA, id: diva2:1003154
Conference
Symposium on Bench Testing of the Lubrication and Wear Properties of Industrial Fluids Used in Machinery Application : 26/06/2000 - 27/06/2000
Note
Godkänd; 2001; 20081125 (cira)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-01-14Bibliographically approved

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Åhrström, Bert-Olof
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)

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CiteExportLink to record
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