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A Thermoelastic Investigation of Friction Phenomena

[+] Author Affiliations
E. J. Berger, D. V. Deshmukh

University of Virginia, Charlottesville, VA

T. J. Mackin, X. Xue

University of Illinois, Urbana, IL

Paper No. WTC2005-63245, pp. 231-232; 2 pages
doi:10.1115/WTC2005-63245
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

We have studied dynamic friction phenomena using a variety of experimental measurement approaches. We have combined thermoelastic stress analysis (TSA) and optical microscopy to measure both the stress field and the interface slip displacement in a model frictional contact. We use a plane stress, fiber pullout-type geometry to produce a line contact interface. The interface operated in the partial slip regime with no gross sliding. The stress field and slip displacement information allow us to construct a friction constitutive relationship directly from experimental data. We also use complementary interface modeling to physically interpret the experimental observations. The results suggest that the interface slip zone size is a nominally linear function of pullout force, while the interface slip displacement responds as a second-order function of distance along the interface. When combined, these observations suggest a scaling law for per-cycle energy dissipation of the form EFo 3 , where Fo is the forcing amplitude. Experimental and modeling results are presented to support this conclusion.

Copyright © 2005 by ASME
Topics: Friction

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