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A compact internal drum test rig for measurements of rolling contact forces between a single treadblock and a substrate
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-2683-1553
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. Eindhoven University of Technology, The Netherlands.ORCID iD: 0000-0002-3609-3005
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0001-5760-3919
(English)Manuscript (preprint) (Other academic)
Abstract [en]

A novel test rig design is presented which enables detailed studies of the three force components generated in the impact and release phase of rolling contact between a tyre tread block and a substrate. The design of the compact internal drum test rig provides realistic impact and release angles for the tread block-substrate contact and enables force measurements at high rolling speeds with a high signal-to-noise ratio. Measurements of the rolling contact forces are presented for different values of rolling velocity, static pre-load and acceleration. It is demonstrated that this test rig provides results which contribute to the understanding of tyre--road interaction and can be used as input to modelling-based development of both tyres and roads aiming for improved handling, safety, energy efficiency and comfort.

Keyword [en]
Tread block; Road; Contact forces; Rubber friction; Rolling contact; Test rig
National Category
Engineering and Technology Vehicle Engineering Tribology Fluid Mechanics and Acoustics
Research subject
Vehicle and Maritime Engineering
Identifiers
URN: urn:nbn:se:kth:diva-193930OAI: oai:DiVA.org:kth-193930DiVA: diva2:1034688
Projects
Centre for Eco2 Vehicle Design
Funder
VINNOVA
Note

QC 20161014

Available from: 2016-10-12 Created: 2016-10-12 Last updated: 2016-10-14Bibliographically approved
In thesis
1. On the influence of surface roughness on rolling contact forces
Open this publication in new window or tab >>On the influence of surface roughness on rolling contact forces
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Road vehicle tyres, railway wheels and ball bearings all generate rolling contact forces which are transferred within a finite area of contact between the rolling element and the substrate. Either it is visible or not for the human eye, a certain degree of roughness is always present on the contacting surfaces and it influences the generation of both vertical and lateral contactforces. The purpose of this investigation is to enhance the understanding and modelling of the influence from small-scale surface roughness on the generation of rolling contact forces. To this end, a computationally efficient method to include roughness-induced contact nonlinearities in the dynamic modelling of rolling contacts is proposed. The method is implemented in a time domain model for vertical wheel–track interaction to model rolling-induced rail vibrations, showing good agreement with measurements. Furthermore, a test rig is developed and used for the investigation of tyre–road rolling contact forces. Detailed studies are performed on the influence of substrate roughness on the resulting contact forces for a tyre tread block which is rolling at different operating conditions. The choice of substrate as well as the rolling velocity and the slip ratio is observed to have significant influence on the resulting friction coefficient. For high slip ratios, stick–slip oscillations appear, exhibiting frequency content which is largely dependent on the choice of substrate. The outcomes of this study can potentially be used to improve future tyre–road contacts with respect to wear, traction and noise generation.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. 36 p.
Series
TRITA-AVE, ISSN 1651-7660 ; 2016:75
Keyword
Rolling contact, Surface roughness, Contact forces, Contact modelling, Friction, Road, Asphalt, Substrate, Test-rig, Sliding, Stick–slip, Tyre, Rubber, Tread-block, Wheel–rail interaction
National Category
Engineering and Technology Mechanical Engineering Vehicle Engineering Tribology Fluid Mechanics and Acoustics
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-193935 (URN)978-91-7729-145-9 (ISBN)
Public defence
2016-11-07, F3, Lindstedtsvägen 26, Stockholm, 09:30 (English)
Opponent
Supervisors
Projects
Centre for Eco2 Vehicle Design
Funder
VINNOVA
Note

QC 20161013

Available from: 2016-10-13 Created: 2016-10-12 Last updated: 2016-10-13Bibliographically approved

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