Kalare, RS, Brooks, PC and Barton, DC orcid.org/0000-0003-4986-5817 (2018) Understanding the Contributions of Surface Morphology Transitions and the Phenomenon of Thermoelastic Instabilities on the Torque Output of a Carbon/Carbon Multi-Plate Clutch During Race-Start Conditions. International Journal of Automotive Composites, 3 (2-4). pp. 169-193. ISSN 2051-8218
Abstract
The torque output of a carbon/carbon multi-plate Formula One clutch during race starts has proved to be both unstable and inconsistent. A one-dimensional heat transfer model utilising a Taguchi analysis suggested that a close interdependency exists between surface temperature, surface morphology and coefficient of friction (COF) thus affecting torque output stability. Friction surface examination showed that a non-uniform friction surface height may lead to thermoelastic instabilities (TEI) and effective friction radius (EFR) migration which directly affects torque output. A single clutch-plate interface dynamometer (SCID) confirmed the formation of narrow (~2 mm), high-temperature (1300-1650°C) hot bands during tests which replicated race start conditions, indicating the establishment of TEI. The hot bands did not move radially during single engagements but did migrate between successive engagements indicating that torque instability during single engagements is due to surface morphology effects alone whilst torque inconsistency between engagements is due to both surface morphology and EFR migration effects.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. This is an author produced version of a paper published in International Journal of Automotive Composites. Uploaded in accordance with the publisher's self-archiving policy. The version of record is available online from Inderscience Publishers; https://doi.org/10.1504/IJAUTOC.2017.091406 |
Keywords: | Carbon/carbon composites; Formula One; F1; multi-plate clutch; torque instability; torque inconsistency; surface morphology; hot banding; thermoelastic instabilities; TEI; friction radius migration |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Systems and Design (iESD) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Jun 2017 12:23 |
Last Modified: | 20 Apr 2019 00:39 |
Status: | Published |
Publisher: | Inderscience |
Identification Number: | 10.1504/IJAUTOC.2017.091406 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109023 |