title: Elastic-plastic cube model for ultrasonic friction reduction via Poisson's effect.
abstract: 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.
authors.affiliation: Smart Vehicle Concepts Center, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, United States.
authors.forename: Sheng
authors.initials: S
authors.lastname: Dong
authors.forename: Marcelo J
authors.initials: MJ
authors.lastname: Dapino
mesh_terms: D003198:Computer Simulation; D055119:Elastic Modulus / Q000528:radiation effects; D017276:Friction / Q000528:radiation effects*; D019220:High-Energy Shock Waves; D008153:Lubrication / Q000379:methods*; D008962:Models, Theoretical; D013010:Sonication / Q000379:methods*
keywords: Friction reduction; Piezoelectric actuators; Ultrasonic lubrication