Tribological considerations of threaded fastener friction and the importance of lubrication

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2024-03Rights
© 2023 Elsevier Ltd. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.Peer-Reviewed
YesOpen Access status
openAccessAccepted for publication
2023-12-01
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The torque-tension relationship of threaded fasteners affects almost all engineering disciplines. Tribological processes at fastener interfaces manifest as the system's friction coefficient. Lubrication-related influences are usually described empirically using K or μ. The drive towards lightweight fastener materials in engineering systems and lubricants with reduced environmental impact is challenging existing knowledge and industrial practice in a range of applications, many safety critical. More comprehensive understanding is needed to achieve repeatable friction during assembly and re-assembly, resistance to loosening and fretting during operation, and effective anti-seize for disassembly with a growing range of materials and lubricants. The lubricants considered showed three predominant lubrication mechanisms: plastic deformation of metal powders; burnishing/alignment of molybdenum disulphide, MoS2; and adhering/embedding of non-metal particles. Multivariate analysis identified key sensitivities for these mechanisms. Assembly generated changes at fastener surfaces and in the lubricating materials. Re-assembly exhibited significant reductions in friction.Version
Accepted manuscriptCitation
Dyson CJ, Hopkins WA, Aljeran DA et al (2024) Tribological considerations of threaded fastener friction and the importance of lubrication. Tribology International. 191: 109162.Link to Version of Record
https://doi.org/10.1016/j.triboint.2023.109162Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1016/j.triboint.2023.109162