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Using finite element analysis to predict the brake pressure needed for effective rotor cleaning in disc brakes
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 Design (Div.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Machine Design (Div.).
2008 (English)In: SAE Technical Paper 2008-01-2565, USA: SAE , 2008, 1-10 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents an approach to simulating wear on both contact surfaces at the pad-to-rotor interface in discbrakes using general purpose finite element software. Itrepresents a first step toward a method of simulating the brake pressure needed to effectively clean the rotor ofunwanted oxide layers. Two simulation cases are presented. The first addresses running-in wear underconstant load and corresponds to repeated brakeapplications at the same constant brake load. Thesecond studies what will happen if a lower load is applied after the contact surfaces have been run-in at ahigher load level. This lower load is applied to wear off an oxide layer after a sequence of repeated stop braking at higher load levels.

Place, publisher, year, edition, pages
USA: SAE , 2008. 1-10 p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-9876DOI: 10.4271/2008-01-2565Scopus ID: 2-s2.0-84877480272OAI: oai:DiVA.org:kth-9876DiVA: diva2:139533
Conference
SAE 26th Annual Brake Colloquium & Exhibition
Note

QC 20100811

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.
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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Söderberg, Anders

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