Please use this identifier to cite or link to this item:
https://doi.org/10.15480/882.3646
Publisher DOI: | 10.1007/s11071-021-06543-8 | Title: | Critical thresholds for mode-coupling instability in viscoelastic sliding contacts | Language: | English | Authors: | Papangelo, Antonio Putignano, Carmine Hoffmann, Norbert ![]() |
Keywords: | Flutter; Friction-induced vibrations; Mode-coupling; Soft matter; Viscoelasticity | Issue Date: | 5-Jun-2021 | Publisher: | Springer Science + Business Media B.V | Source: | Nonlinear Dynamics 104 (4): 2995-3011 (2021-06) | Abstract (english): | Mode-coupling instabilities are known to trigger self-excited vibrations in sliding contacts. Here, the conditions for mode-coupling (or “flutter”) instability in the contact between a spherical oscillator and a moving viscoelastic substrate are studied. The work extends the classical 2-Degrees-Of-Freedom conveyor belt model and accounts for viscoelastic dissipation in the substrate, adhesive friction at the interface and nonlinear normal contact stiffness as derived from numerical simulations based on a boundary element method capable of accounting for linear viscoelastic effects. The linear stability boundaries are analytically estimated in the limits of very low and very high substrate velocity, while in the intermediate range of velocity the eigenvalue problem is solved numerically. It is shown how the system stability depends on externally imposed parameters, such as the substrate velocity and the normal load applied, and on contact parameters such as the interfacial shear strength τ and the viscoelastic friction coefficient. In particular, for a given substrate velocity, there exist a critical shear strength τ,crit and normal load Fn,crit, which trigger mode-coupling instability: for shear stresses larger than τ,crit or normal load smaller than Fn,crit, self-excited vibrations have to be expected. |
URI: | http://hdl.handle.net/11420/9858 | DOI: | 10.15480/882.3646 | ISSN: | 1573-269X | Journal: | Nonlinear dynamics | Institute: | Strukturdynamik M-14 | Document Type: | Article | More Funding information: | Open access funding provided by Politecnico di Bari within the CRUI-CARE Agreement. A.P. and C.P. acknowledge the support by the Italian Ministry of Education, University and Research under the Programme Department of Excellence Legge 232/2016 (Grant No. CUPD94I18000260001). A.P. acknowledges support from “PON Ricerca e Innovazione 2014-2020-Azione I.2” - D.D. n. 407, 27/02/2018, bando AIM (Grant No. AIM1895471). A.P. acknowledges support from Tutech Innovation Gmbh. | License: | ![]() |
Appears in Collections: | Publications with fulltext |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Papangelo2021_Article_CriticalThresholdsForMode-coup.pdf | Verlags-PDF | 1,3 MB | Adobe PDF | View/Open![]() |
Page view(s)
100
Last Week
0
0
Last month
5
5
checked on Jun 8, 2023
Download(s)
70
checked on Jun 8, 2023
SCOPUSTM
Citations
3
Last Week
0
0
Last month
0
0
checked on Jun 29, 2022
Google ScholarTM
Check
Note about this record
Cite this record
Export
This item is licensed under a Creative Commons License