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Open AccessArticle

Voltage-Induced Friction with Application to Electrovibration

Department of System Dynamics and Friction Physics, Technische Universität Berlin, 10623 Berlin, Germany
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Lubricants 2019, 7(12), 102; https://doi.org/10.3390/lubricants7120102
Received: 31 October 2019 / Revised: 16 November 2019 / Accepted: 18 November 2019 / Published: 20 November 2019
(This article belongs to the Special Issue Selected Papers from the 60th German Tribology Conference 2019)
Due to the growing interest in robotic and haptic applications, voltage-induced friction has rapidly gained in importance in recent years. However, despite extensive experimental investigations, the underlying principles are still not sufficiently understood, which complicates reliable modeling. We present a macroscopic model for solving electroadhesive frictional contacts which exploits the close analogy to classical adhesion theories, like Johnson-Kendall-Roberts (JKR) and Maugis, valid for electrically neutral bodies. For this purpose, we recalculate the adhesion force per unit area and the relative surface energy from electrostatics. Under the assumption of Coulomb friction in the contact interface, a closed form equation for the friction force is derived. As an application, we consider the frictional contact between the fingertip and touchscreen under electrovibration in more detail. The results obtained with the new model agree well with available experimental data of the recent literature. The strengths and limitations of the model are clearly discussed. View Full-Text
Keywords: friction; adhesion; contact mechanics; Maugis theory; electrovibration friction; adhesion; contact mechanics; Maugis theory; electrovibration
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MDPI and ACS Style

Heß, M.; Popov, V.L. Voltage-Induced Friction with Application to Electrovibration. Lubricants 2019, 7, 102.

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