SOME PARAMETERS AFFECTING TACTILE FRICTION


DINC O., ETTLES C., CALABRESE S., SCARTON H.

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, vol.113, no.3, pp.512-517, 1991 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 113 Issue: 3
  • Publication Date: 1991
  • Doi Number: 10.1115/1.2920653
  • Title of Journal : JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
  • Page Numbers: pp.512-517

Abstract

The friction of a sliding tactile contact was measured in an apparatus which simulated a keyboard. Results were taken for several materials. The friction coefficient was found to decrease with increasing load and with increasing speed. Experiments at varying humidity and surface roughness helped to define the friction mechanisms. It is concluded that tactile friction is predominantly adhesive, but modified by liquid bridging between the ridges of the skin and the counterface. Increased bridging due to higher humidity causes increased friction from viscous shearing effects, while increased roughness allows fewer bridges to form, decreasing the friction.