Change search
ReferencesLink to record
Permanent link

Direct link
Validation of a simplified numerical contact model
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.ORCID iD: 0000-0003-4461-0209
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Elements.ORCID iD: 0000-0002-2578-9453
2008 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 41, no 9-10, 926-933 p.Article in journal (Refereed) Published
Abstract [en]

Surface roughness tends to have a significant effect on how loads are transmitted at the contact interface between solid bodies. Most numerical contact models for analyzing rough surface contacts are computational demanding and more computationally efficient contact models are required. Depending on the purpose of the simulation, simplified and less accurate models can be preferable to more accurate, but also more complex, models. This paper discusses a simplified contact model called the elastic foundation model and its applicability to rough surfaces. The advantage of the model is that it is fast to evaluate, but its disadvantage is that it only gives an approximate solution to the contact problem. It is studied how surface roughness influences the errors in the elastic foundation solution in terms of predicted pressure distribution, real contact area, and normal and tangential contact stiffness. The results can be used to estimate the extent of error in the elastic foundation model, depending on the degree of surface roughness. The conclusion is that the elastic foundation model is not accurate enough to give a correct prediction of the actual contact stresses and contact areas, but it might be good enough for simulations where contact stiffness are of interest.

Place, publisher, year, edition, pages
2008. Vol. 41, no 9-10, 926-933 p.
Keyword [en]
contact calculations; Winkler; surface roughness; elastic foundation model; SIMULATION; WEAR
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-9874DOI: 10.1016/j.triboint.2008.02.013ISI: 000257736800016ScopusID: 2-s2.0-44949179326OAI: diva2:139508

QC 20100621

Available from: 2009-01-23 Created: 2009-01-23 Last updated: 2016-05-12Bibliographically approved
In thesis
1. 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.
Trita-MMK, ISSN 1400-1179 ; 2009:03
Interfaces, Models, Simulation, Friction, Wear
National Category
Other Materials Engineering
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)
QC 20100811Available from: 2009-01-23 Created: 2009-01-20 Last updated: 2010-08-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Söderberg, AndersBjörklund, Stefan
By organisation
Machine Elements
In the same journal
Tribology International
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 217 hits
ReferencesLink to record
Permanent link

Direct link