On the frictional behavior of an incipient-sliding contact of sphere-on-flat with high normal loads

L. Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Levinson et al [1] present experimental results that show a steep reduction in the static coefficient of friction of a dry sphere-on-flat contact as the normal load increases. The experiments cover a range of loading conditions from elastic contact to contact with significant plastic deformation. A theoretical analysis is carried out in this study using a contact model of an elastic-plastic sphere on a rigid flat. The shear strength of the contact interface is assumed to be proportional to the contact pressure until it reaches a limiting value that is below the bulk shear strength of the sphere. The theory predicts a friction behavior that is consistent with that from the experimental results in [1] in all key aspects. The analysis reveals that a relatively low limiting shear strength in the contact interface is likely the key factor leading to the dramatic reduction in the friction coefficient and the negligible junction growth obtained in the experiments.

Original languageEnglish (US)
Title of host publicationProceedings of the World Tribology Congress III - 2005
PublisherAmerican Society of Mechanical Engineers
Pages393-394
Number of pages2
ISBN (Print)0791842010, 9780791842010
DOIs
StatePublished - Jan 1 2005
Event2005 World Tribology Congress III - Washington, D.C., United States
Duration: Sep 12 2005Sep 16 2005

Publication series

NameProceedings of the World Tribology Congress III - 2005

Other

Other2005 World Tribology Congress III
CountryUnited States
CityWashington, D.C.
Period9/12/059/16/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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