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United States Department of Agriculture

Agricultural Research Service

Research Project: NEW METALWORKING FLUIDS FROM BIO-BASED MATERIALS

Location: Bio-oils Research Unit

Title: Effect of Chemical Structure on Elastohydrodynamic Traction Coefficient

Authors
item Biresaw, Girma
item Bantchev, Grigor

Submitted to: Society of Tribologists and Lubrication Engineers
Publication Type: Abstract Only
Publication Acceptance Date: September 21, 2009
Publication Date: May 17, 2010
Citation: Biresaw, G., Bantchev, G.B. 2010. Effect of Chemical Structure on Elastohydrodynamic Traction Coefficient [abstract]. Society of Tribologists and Lubrication Engineers. p. 50.

Technical Abstract: The elastohydrodynamic traction properties of a series of biobased and petroleum based oils of varying chemical structures in steel-steel contact were investigated. Traction was measured on a ball-on disk type elastohydrodynamic traction instrument. Elastohydrodynamic traction coefficient (tc) was measured as a function of slide-to-roll ratio (srr) at constant entrainment speed (u); or as a function of u at constant srr. Both types of experiments were conducted under various temperatures and contact pressures. Significant differences in tc properties between biobased and petroleum-based fluids were observed. These differences could not be accounted for based on differences in the viscosities between the biobased and petroleum-based fluids. This may be an indication of the importance of the differences in the chemical structures between these two types of fluids. In this presentation, the effect of chemical structure on tc of biobased vs petroleum-based fluids will be explored.

Last Modified: 9/1/2014
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