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Open AccessArticle

Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions

1
DIMA, Department of Mechanical and Aerospace Engineering, “La Sapienza” University of Rome, via Eudossiana 18, 00184 Rome, Italy
2
Grenoble Alpes University, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
3
LaMCoS, Contacts and Structural Mechanics Laboratory, University of Lyon, CNRS, INSA Lyon, UMR 5259, 20 rue des Sciences, F-69621 Villeurbanne, France
*
Author to whom correspondence should be addressed.
Lubricants 2019, 7(7), 56; https://doi.org/10.3390/lubricants7070056
Received: 12 June 2019 / Revised: 21 June 2019 / Accepted: 23 June 2019 / Published: 2 July 2019
(This article belongs to the Special Issue Tribology and Contact Dynamics)
Modeling of frictional contact systems with high accuracy needs the knowledge of several contact parameters, which are mainly related to the local phenomena at the contact interfaces and affect the complex dynamics of mechanical systems in a prominent way. This work presents a newer approach for identifying reliable values of the normal contact stiffness between surfaces in contact, in both sliding and sticking conditions. The combination of experimental tests, on a dedicated set-up, with finite element modeling, allowed for an indirect determination of the normal contact stiffness. The stiffness was found to increase with increasing contact pressure and decreasing roughness, while the evolution of surface topography and third-body rheology affected the contact stiffness when sliding. View Full-Text
Keywords: contact stiffness; friction; contact dynamics; numerical tribology contact stiffness; friction; contact dynamics; numerical tribology
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MDPI and ACS Style

Tonazzi, D.; Massi, F.; Salipante, M.; Baillet, L.; Berthier, Y. Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions. Lubricants 2019, 7, 56.

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