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Main Title: Effect of elastic grading on fretting wear
Author(s): Willert, Emanuel
Dmitriev, Andrey I.
Psakhie, Sergey G.
Popov, Valentin L.
Type: Article
Language Code: en
Abstract: We consider fretting wear in elastic frictional contact under influence of oscillations of small amplitude and investigate the question, how wear damage can be influenced by the introduction of material gradients. To achieve a general understanding we restrict our consideration to media with a power-law dependency of the elastic modulus on depth. In this case, a complete analytical solution can be found for the final worn shape. In the limiting case of small fretting oscillations we obtain a simple, closed-form asymptotic solution of the problem. We find that the optimum grading depends on the oscillation amplitude: for large amplitudes, the use of materials with a positive exponent decreases the wear volume whilst for very small amplitudes the use of graded materials with slightly negative exponent is beneficial. Especially interesting is the case of the Gibson-medium which may help avoiding both fretting wear and fretting fatigue.
Issue Date: 24-May-2019
Date Available: 11-Jun-2019
DDC Class: 500 Naturwissenschaften und Mathematik
600 Technik, Technologie
Subject(s): fretting wear
elastic frictional contact
Sponsor/Funder: DFG, 414044773, Open Access Publizieren 2019 - 2020 / Technische Universität Berlin
Journal Title: Scientific Reports
Publisher: Springer Nature
Publisher Place: London
Volume: 9
Article Number: 7791
Publisher DOI: 10.1038/s41598-019-44269-1
EISSN: 2045-2322
Appears in Collections:FG Systemdynamik und Reibungsphysik » Publications

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