University of Oulu

Jouko Hintikka, Antti Mäntylä, Joona Vaara, Tero Frondelius, Arto Lehtovaara, Stable and unstable friction in fretting contacts, Tribology International, Volume 131, 2019, Pages 73-82, ISSN 0301-679X,

Stable and unstable friction in fretting contacts

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Author: Hintikka, Jouko1,2; Mäntylä, Antti1; Vaara, Joona1;
Organizations: 1R&D and Engineering, Wärtsilä, P.O.Box 244, 65101, Vaasa, Finland
2Tribology and Machine Elements, Laboratory of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland
3University of Oulu, Erkki Koiso-Kanttilan katu 1, 90014, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2018-11-07


Designing contacts susceptible to fretting is a challenging task due to uncertainties related to friction. For example, coefficient of friction has shown to vary as a function of load cycles and so-called non-Coulomb friction can exist during individual load cycles. Concepts of stable and unstable friction are presented in this manuscript. Based on experiments, no fretting is to be expected if the utilization of friction is kept below unstable friction threshold. If contact is subjected to tangential load above this threshold, reciprocating slippage, fretting, is to be expected even if the contact was initially in stick. Experimental evidence for existence of such threshold is presented in form of friction data, slip data and fretting scars.

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Series: Tribology international
ISSN: 0301-679X
ISSN-E: 1879-2464
ISSN-L: 0301-679X
Volume: 131
Pages: 73 - 82
DOI: 10.1016/j.triboint.2018.10.014
Type of Publication: A1 Journal article – refereed
Field of Science: 214 Mechanical engineering
Funding: This study was conducted as part of the MaNuMiES (Dnro 3361/31/2015) and WIMMA (Dnro 1566/31/2015) -research projects. The authors are grateful for the financial support provided by Business Finland Oy (former Tekes), Wärtsilä Finland Oy, Agco Power Oy and Global Boiler Works Oy.
Copyright information: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (