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A mechanistic approach to predicting the friction behaviour of human skin

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Author: Kuilenburg, J. van · Masen, M.A. · Heide, E. van der
Type:article
Date:2012
Source:ASME/STLE 2012 International Joint Tribology Conference, IJTC 2012, 7-10 October 2012, Denver, CO, USA. American Society of Mechanical Engineers, Tribology Division, TRIB, 45-47
Identifier: 478756
ISBN: 9780791845080
Keywords: Materials · Contact Mechanics · Contact parameters · Fingerprint ridges · Friction behavior · Friction behaviour · In-vivo experiments · Laser technologies · Ultra-short pulsed · Deformation · Friction · Geometry · Skin · Tribology · Behavioral research · High Tech Systems & Materials · Industrial Innovation · Mechatronics, Mechanics & Materials · MPC - Materials Performance Centre · TS - Technical Sciences

Abstract

In this work, analytical models available from contact mechanics theory having a proven record in mechanical engineering were used to develop a model predicting the friction behavior of human skin. A multi-scale contact model was developed in which the contact parameters are calculated at three levels, each level characterized by its elastic behavior and geometry. For a product part in contact with the so-called hairy skin the skin topography can be described as being composed of spherical contacts, whereas for the finger in contact with a product surface the fingerprint ridges are modeled as annulus shaped line contacts. Sliding friction was measured in vivo between the skin and different surface textures produced using ultra-short pulsed laser technology. The results observed during in vivo experiments are very well explained by the developed model, which predicts the friction as a function of product geometry, asperity geometry and normal load. Copyright © 2012 by ASME.