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Analytical Study of Sliding Instability due to Velocity- and Temperature-Dependent Friction
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.).ORCID-id: 0000-0002-5259-1426
2016 (Engelska)Ingår i: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 61, nr 2, s. 1-10Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The instability of sliding causes deterioration of performance characteristics of tribosystems and is undesired. To predict its occurrence, the motion of a body of a one-degree-of-freedom system with friction is investigated about the steady sliding equilibrium position. The motion equation is formulated with the friction coefficient dependent on the sliding velocity and contact temperature changing due to transient heat conduction in the body. An analytical expression for the body motion is derived using the Laplace integral transform. It is shown that the sliding instability can manifest in the form of deviation of the body from the equilibrium position or in the form of oscillation. The instability conditions containing the friction–velocity and friction–temperature slope coefficients are obtained. Positive friction–temperature slope results in the deviation of the body from the equilibrium position. At negative friction–temperature slope, both types of the sliding instability can occur. The proposed instability conditions agree well with existing theoretical concepts and can be useful when designing tribosystems.

Ort, förlag, år, upplaga, sidor
Springer-Verlag New York, 2016. Vol. 61, nr 2, s. 1-10
Nyckelord [en]
Sliding instability, Frictional oscillation, Frictional heating, Instability condition
Nationell ämneskategori
Tribologi (ytteknik omfattande friktion, nötning och smörjning)
Identifikatorer
URN: urn:nbn:se:kth:diva-180529DOI: 10.1007/s11249-015-0628-9ISI: 000368597500001Scopus ID: 2-s2.0-84949292577OAI: oai:DiVA.org:kth-180529DiVA, id: diva2:894309
Anmärkning

QC 20160121. QC 20160220

Tillgänglig från: 2016-01-14 Skapad: 2016-01-14 Senast uppdaterad: 2018-01-10Bibliografiskt granskad

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Nosko, Oleksii

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