Characterisation of the Viscoelasticity of Engine Lubricants at Elevated Temperatures and Shear Rates

Format:

Conference/Event

Author/Creator:

Williamson, B. P., author.

Conference Name:

International Congress & Exposition (1995-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

Most automotive multigrade oils contain high molecular weight polymeric viscosity index improvers (VIIs) and are to a greater or lesser extent, viscoelastic liquids. A way of characterising lubricant viscoelasticity (as typified by the first normal stress difference) using slit die rheometry is described in this paper. This technique has been applied to measure the viscoelasticity of several conventional multigrade oils at temperatures and shear rates close to that experienced by the lubricant in an automotive journal bearing. Additionally, the potential of slit die rheometry as a technique to measure the viscosity of engine oils at shear rates up to 2 X 106s-1 is assessed

Notes:

Vendor supplied data

Publisher Number:

951032

Access Restriction:

Restricted for use by site license