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Perception of friction in tactile exploration of micro-structured rubber samples

  • Fingertip friction and the related shear of skin are key mechanical mechanisms in tactile perception, but the perception of friction itself is rarely explored except for the flat surfaces of tactile displays. We investigated the perception of friction for tactile exploaration of a unique set of samples whose fabric-like surfaces are equpped with regular arrays of flexible micropillars.The measured fingertip friction increases with decreasing bending stiffness, where the latter is controlled by radius (20-75 µm) an aspect ration of the micropillars. In forced-choice tasks, participants noticed relative differences in friction as small as 0.2, and even smaller when a sample with less than 100µm distance between pillars is omitted from the analysis. In an affective ranking of sample upon active touch, the perception of pleasantness is anticorrelated with the measured friction. Our results offer insights towards a rational design of materials with well-controlled surface microstructure which elicit a dedicated tactile appeal.

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Document Type:Conference Proceeding
conferenceobject_Type:Beitrag in Tagungsband
Conference Place:Hamburg <GER>
Conference Date:22.05.2022-25.05.2022
Author:Maja FehlbergORCiD, Kwang-Seop KimORCiD, Knut DrewingORCiD, René HenselORCiD, Roland BennewitzORCiD
Parent Title (English):Haptics: Science: Science, Technology, Applications
Subtitle (German):13th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2022
First Page:21
Last Page:29
Series (Serial Number):Lecture Notes in Computer Science (13235)
Place of publication:Heidelberg
Editor:Hasti Seifi
Year of first Publication:2022
Release Date:2022/08/03
Tag:friction; materials; tactile perception
Scientific Units:Functional Microstructures
Interactive Surfaces
DDC classes:500 Naturwissenschaften und Mathematik / 530 Physik
Open Access:Open Access
Signature:INM 2022/055
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International