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Frictions models for sliding dry, boundary and mixed lubricated contacts
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.ORCID iD: 0000-0002-2578-9453
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.ORCID iD: 0000-0003-4461-0209
2007 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 40, 580-587 p.Article in journal (Refereed) Published
Abstract [en]

Friction, lubrication, and wear have a strong influence on the performance and behavior of mechanical systems. This paper deals with different friction models for sliding contacts running under different conditions. The models presented are suited to different situations, depending on the type of contact, running conditions, and the behavior of interest. The models will be discussed from simulation and tribological points of view. The different types of friction models considered are:

center dot friction models for transient sliding under dry, boundary and mixed lubrication conditions,

center dot friction models for micro-displacements of engineering surfaces subjected to transient sliding,

center dot friction models often used in the simulation and control of technical systems,

center dot combined friction models that represent physical behaviors fairly well but are also suitable for use in simulating systems,

center dot friction models that take into account the stochastic nature of interacting surface asperities

Place, publisher, year, edition, pages
2007. Vol. 40, 580-587 p.
Keyword [en]
friction; model; sliding contact; Coulomb; Dahl; Stribeck
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-5771DOI: 10.1016/j.triboint.2005.11.014ISI: 000243576700003Scopus ID: 2-s2.0-33845185783OAI: oai:DiVA.org:kth-5771DiVA: diva2:10261
Note

QC 20100811

Available from: 2006-05-22 Created: 2006-05-22 Last updated: 2017-12-14Bibliographically approved
In thesis
1. On interface modeling  with emphasis on friction
Open this publication in new window or tab >>On interface modeling  with emphasis on friction
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

The general trend toward increased use of computer models and simulations during product development has led to a need for accurate and reliable product models. The function of many products relies on contact interfaces between interacting components. To simulate the behavior of such products, accurate models of both components and interfaces are required. Depending on the purpose of the simulation, interface models of different degrees of complexity are needed. In simulation of very large systems with many interfaces, it might be computationally expensive to integrate detailed models of each individual interface. Condensed models, or abstractions, that describe the interface properties with a minimum of degrees of freedom are therefore required.

This thesis deals with mechanical interfaces with an emphasis on friction. In the four appended papers friction models are discussed in terms of condensed models, as well as in terms of more detailed contact models. The aim is to study how friction can be modeled in behavioral simulation of products and to discuss the convenience and relevance of using different types of friction models as building blocks of a system model in behavioral simulations.

Paper A presents a review of existing condensed friction models for sliding contacts under different running conditions and discusses the models from both simulation and tribological points of view.

In papers B and C a simplified contact model, called the elastic foundation model, is used to model friction in a boundary-lubricated rolling and sliding contact. The model is integrated in a dynamic rigid body model of a mechanical system, the system behavior is simulated, and the result is compared with experimental results.

Paper D discusses the application of the elastic foundation model to rough surface contact problems and investigates how the error in the elastic foundation results depends on surface roughness.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 14 p.
Series
Trita-MMK, ISSN 1400-1179 ; 2006:08
Keyword
interface model, contact, friction, simulation, system behaviour, surface roughness, elastic foundation
National Category
Other Materials Engineering
Identifiers
urn:nbn:se:kth:diva-3986 (URN)
Presentation
2006-05-19, Seminarierum A425, KTH, Brinellvägen 83, Stockholm, 09:00
Opponent
Supervisors
Note
QC 20101129Available from: 2006-05-22 Created: 2006-05-22 Last updated: 2010-11-29Bibliographically approved
2. Interface modeling - friction and wear
Open this publication in new window or tab >>Interface modeling - friction and wear
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The general trend toward increased use of computer models and simulations during product development calls for accurate and reliable product models. The function of many products relies on contact interfaces between interacting components. Simulating the behavior of such products requires accurate models of both components and interfaces. Depending on the purpose of the simulation, interface models of different degrees of detail are needed. In simulating very large systems with many interfaces, it might be computationally expensive to integrate detailed models of each individual interface. Condensed models, or abstractions, that describe the interface properties with the fewest degrees of freedom are therefore required. This thesis deals with the modeling and simulation of mechanical interfaces in a systems context. The five appended papers discuss the issue from both the simulation and tribological points of view. The aim is to study how friction and wear can be modeled in the behavioral simulation of technical systems and to discuss the convenience and applicability of using different types of models as building blocks of a system model in simulations. Paper A reviews existing friction models of sliding contacts under different running conditions. Paper B uses a simplified contact model, the elastic foundation model, to model friction in a boundary-lubricated rolling and sliding contact. The model is integrated into a dynamic rigid body model of a mechanical system, and the system behavior is simulated. Paper C discusses the application of the elastic foundation model to rough surface contact problems and investigates how the error in its results depends on surface roughness. Papers D and E address how the wear of the contact surfaces at the pad-to-rotor interface in a passenger car disc brake can be simulated using finite element analysis (FEA).

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. 20 p.
Series
Trita-MMK, ISSN 1400-1179 ; 2009:03
Keyword
Interfaces, Models, Simulation, Friction, Wear
National Category
Other Materials Engineering
Identifiers
urn:nbn:se:kth:diva-9861 (URN)978-91-7415-215-9 (ISBN)
Public defence
2009-02-09, Flodissalen, Lindstedsvägen 26, Stockholm, 13:00 (English)
Opponent
Supervisors
Note
QC 20100811Available from: 2009-01-23 Created: 2009-01-20 Last updated: 2010-08-11Bibliographically approved

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Björklund, StefanSöderberg, Anders

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