Analysis of Traction Curve in Linear Region Considering Volume Viscoelasticity

[+] Author and Article Information
Narihiko Yoshimura, Noboru Umemoto

Tonen Corporation, Corporate Research & Development Laboratory, 1-3-1, Nishi-Tsurugaoka Ohimachi, Iruma-gun, Saitama, 356-8505, Japan

Tsunamitsu Nakahara

Department of Mechanical and Intelligent Systems Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguroku, Tokyo, 152, Japan

J. Tribol 121(2), 252-258 (Apr 01, 1999) (7 pages) doi:10.1115/1.2833928 History: Received January 15, 1998; Revised June 09, 1998; Online January 24, 2008


Measurements of the gradient in the linear region of traction curve, where the effects of heat generation and nonlinearity of shear viscosity can be neglected were made for two kinds of synthetic oils, DOP and 5P4E, using a traction tester improved to a precision less than 0.01 percent in slip ratio. The measured results were compared with the theoretical results based on a viscoelastic model for shear stress and on an elastic model for compressibility using primary data of the rheological properties which were obtained not by means of traction test; they were markedly less than the theoretical results under low speed for both oils and also under high speed for DOP. A new analysis of the traction was performed considering volume viscoelasticity for compressibility which relates shear viscoelasticity under high pressure. The theoretical results agree fairly with the measured results.

Copyright © 1999 by The American Society of Mechanical Engineers
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