Influence of Ultrasonic Oscillation on Static and Sliding Friction

• Published in: Tribology letters Vol. 48; no. 1; pp. 51 - 62
• Main Authors: Teidelt, Elena, Starcevic, Jasminka, Popov, Valentin L.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.10.2012; Springer Nature B.V
• Subjects: Amplitudes; Chemistry and Materials Science; Corrosion and Coatings; Friction reduction; Materials Science; Nanotechnology; Original Paper; Oscillations; Physical Chemistry; Sliding friction; Surfaces and Interfaces; Theoretical and Applied Mechanics; Thin Films; Tribology; Ultrasonic oscillations; Static friction; Microscopic and macroscopic friction; Friction slip length; Sliding friction
• ISSN: 1023-8883; 1573-2711
• DOI: 10.1007/s11249-012-9937-4

Vibrations of varying frequency and amplitude are used in many technological areas to control and reduce friction. In this study we report the results of systematic high-precision measurements of the static and sliding friction under the influence of ultrasonic oscillations. We investigate the effect of ultrasonic oscillations for in-plane and out-of-plane oscillations in the completely relevant interval of oscillation amplitudes and sliding velocities and for various material pairings. The experimental results are interpreted on the basis of both macroscopic and microscopic models. There are two main effects which are of interest for tribological applications. Firstly, the frictional force typically decreases with increasing oscillation amplitude, with an oscillation amplitude of about 0.1 μm typically being sufficient for a significant decrease of frictional force. Secondly, the decrease of force is larger at smaller sliding velocities; therefore, at sufficiently large oscillation amplitudes, the frictional force always increases with sliding velocity. This effect can be used to suppress frictionally induced vibrations.