期刊
ULTRASONICS
卷 54, 期 1, 页码 343-350出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2013.05.011
关键词
Ultrasonic lubrication; Friction reduction; Piezoelectric actuators
资金
- Smart Vehicle Concepts Center
- National Science Foundation Industry/University Cooperative Research Center (I/UCRC)
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1238286] Funding Source: National Science Foundation
Ultrasonic friction reduction has been studied experimentally and theoretically. This paper presents a new elastic-plastic cube model which can be applied to various ultrasonic lubrication cases. A cube is used to represent all the contacting asperities of two surfaces. Friction force is considered as the product of the tangential contact stiffness and the deformation of the cube. Ultrasonic vibrations are projected onto three orthogonal directions, separately changing contact parameters and deformations. Hence, the overall change of friction forces. Experiments are conducted to examine ultrasonic friction reduction using different materials under normal loads that vary from 40 N to 240 N. Ultrasonic vibrations are generated both in longitudinal and vertical (out-of-plane) directions by way of the Poisson effect. The tests show up to 60% friction reduction; model simulations describe the trends observed experimentally. (C) 2013 Elsevier B.V. All rights reserved.
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