Friction of the Human Finger Pad: Influence of Moisture, Occlusion and Velocity

The current paper describes an experimental study of the friction of the human finger pad. The data highlight the role of sweat secretion and contact occlusion in producing wide-ranging values for the coefficient of friction that are particularly sensitive to the tribological configuration, sliding...

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Bibliographic Details
Published in:Tribology letters Vol. 44; no. 2; pp. 117 - 137
Main Authors: Pasumarty, Subrahmanyam M., Johnson, Simon A., Watson, Simon A., Adams, Michael J.
Format: Journal Article
Language:English
Published: Boston Springer US 01.11.2011
Springer Nature B.V
Subjects:
Chemistry and Materials Science
Coefficient of friction
Configurations
Corrosion and Coatings
Fingers
Friction
Human
Materials Science
Moisture content
Nanotechnology
Occlusion
Original Paper
Physical Chemistry
Porosity
Roughening
Surface roughness
Surfaces and Interfaces
Sweat
Theoretical and Applied Mechanics
Thin Films
Tribology
Water
Friction mechanisms
Skin
Biotribology
ISSN:1023-8883, 1573-2711
Online Access:Get full text
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Summary:The current paper describes an experimental study of the friction of the human finger pad. The data highlight the role of sweat secretion and contact occlusion in producing wide-ranging values for the coefficient of friction that are particularly sensitive to the tribological configuration, sliding velocity, surface roughness and porosity of the counterbody. In particular, the large coefficients of friction typically observed on dry smooth surfaces are associated with a relatively damp interface, and can be considerably reduced by either decreasing or increasing the interfacial moisture content or by surface roughening. It is concluded that the very large range in the values of the coefficient of friction reported in the literature mainly result from differences in occlusion time associated with different tribological configurations, as well as from variations in surface roughness and finger pad sweat rates.
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ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-011-9828-0