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Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication

Trimethylolpropane (TMP) esters possess good frictional properties, portraying good potential as alternative bio-lubricants. However, the most common TMP ester, which is TMP oleate, is found to be widely used only for hydraulics application. Therefore, to explore its potential usage in automotive ap...

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Main Authors: Maarof, A. F., Hamdan, S. H.
Format: Article
Published: Universiti Teknologi MARA (UiTM) 2019
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TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/92672/
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spelling my.utm.926722021-10-28T10:09:52Z http://eprints.utm.my/id/eprint/92672/ Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication Maarof, A. F. Hamdan, S. H. TJ Mechanical engineering and machinery Trimethylolpropane (TMP) esters possess good frictional properties, portraying good potential as alternative bio-lubricants. However, the most common TMP ester, which is TMP oleate, is found to be widely used only for hydraulics application. Therefore, to explore its potential usage in automotive applications, the present study determines the frictional behaviour of TMP oleate at different operating lubrication regimes. Friction forces for TMP oleate lubricated conjunction, consisting of cast iron pin being rotated against a stainless-steel disk, are measured using a pin-on-disk type tribometer. The applied normal load is 3 kg while the disk rotational speed is varied between 20 rpm and 2000 rpm. Along fluid film and boundary lubrication regimes, the average coefficients of friction for TMP oleate lubricated conjunction are measured to be 0.074 and 0.101, respectively. Along fluid film lubrication regime, with the maximum Hertzian pressure being calculated to be 1.1 GPa, the contact is expected to be elastohydrodynamic in nature. Transitions of lubrication regimes, similar to the classical Stribeck curve, are also observed between sliding velocities of 1.8 m.s-1 and 2.7 m.s-1. Hence, the measured Stribeck curve demonstrates the potential use of TMP oleate for automotive applications, where a large range of operating lubrication regimes is required. Universiti Teknologi MARA (UiTM) 2019 Article PeerReviewed Maarof, A. F. and Hamdan, S. H. (2019) Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication. Journal of Mechanical Engineering, 8 (1). pp. 1-9. ISSN 1823- 5514
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Maarof, A. F.
Hamdan, S. H.
Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
description Trimethylolpropane (TMP) esters possess good frictional properties, portraying good potential as alternative bio-lubricants. However, the most common TMP ester, which is TMP oleate, is found to be widely used only for hydraulics application. Therefore, to explore its potential usage in automotive applications, the present study determines the frictional behaviour of TMP oleate at different operating lubrication regimes. Friction forces for TMP oleate lubricated conjunction, consisting of cast iron pin being rotated against a stainless-steel disk, are measured using a pin-on-disk type tribometer. The applied normal load is 3 kg while the disk rotational speed is varied between 20 rpm and 2000 rpm. Along fluid film and boundary lubrication regimes, the average coefficients of friction for TMP oleate lubricated conjunction are measured to be 0.074 and 0.101, respectively. Along fluid film lubrication regime, with the maximum Hertzian pressure being calculated to be 1.1 GPa, the contact is expected to be elastohydrodynamic in nature. Transitions of lubrication regimes, similar to the classical Stribeck curve, are also observed between sliding velocities of 1.8 m.s-1 and 2.7 m.s-1. Hence, the measured Stribeck curve demonstrates the potential use of TMP oleate for automotive applications, where a large range of operating lubrication regimes is required.
format Article
author Maarof, A. F.
Hamdan, S. H.
author_facet Maarof, A. F.
Hamdan, S. H.
author_sort Maarof, A. F.
title Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
title_short Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
title_full Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
title_fullStr Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
title_full_unstemmed Frictional behaviour of trimethylolpropane (TMP) oleate at different regimes of lubrication
title_sort frictional behaviour of trimethylolpropane (tmp) oleate at different regimes of lubrication
publisher Universiti Teknologi MARA (UiTM)
publishDate 2019
url http://eprints.utm.my/id/eprint/92672/
_version_ 1715189672732262400
score 13.211869

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