The effect of dilution oil in the torque performance of magnetorheological grease

Magnetorheological (MR) brake is a device that uses MR material to produce braking torque according to induced current. Even though MR Fluid (MRF) is widely used in MR brake as it has high response and is easy to fabricate, the sedimentation issue has degraded the performance of M R brake. Therefore...

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Main Author: Abdul Kadir, Khairul Anwar
Format: Thesis
Language:English
Published: 2022
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Online Access:http://eprints.utm.my/id/eprint/99618/1/KhairulAnwarKadirMMJIIT2022.pdf
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Institution: Universiti Teknologi Malaysia
Language: English
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spelling my.utm.996182023-06-08T08:10:25Z http://eprints.utm.my/id/eprint/99618/ The effect of dilution oil in the torque performance of magnetorheological grease Abdul Kadir, Khairul Anwar T Technology (General) Magnetorheological (MR) brake is a device that uses MR material to produce braking torque according to induced current. Even though MR Fluid (MRF) is widely used in MR brake as it has high response and is easy to fabricate, the sedimentation issue has degraded the performance of M R brake. Therefore, MR grease (MRG) is introduced to overcome the drawbacks of MRF. Another important benefit of MRG is its self-sealing property which can solve the leaking problem in MRF. Despite the advantageous of no sedimentation of MRG, high viscosity of MRG lower the MR response to the current induced. Thus, the high viscosity of MRG can be reduced by adding dilution oil. Furthermore, the effect of the oil in diluted MRG in MR brake has not been investigated. Several samples of MRGs with different types of dilution oil were prepared by mixing grease and spherical carbonyl iron particles (CIP) using mechanical stirrers. The rheological properties in rotational mode were tested by using rheometer meanwhile the torque performance of MRGs in MR brake were evaluated by changing the current of 0A, 0.4A, 0.8A and 1.2A and fixed the angular speed. The result shows that MRG 3 has the lowest viscosity which is almost 93% reduction while the reduction of viscosity of MRG 2 was 25%. Yet, the torque performances generated by MRG 3 was the highest, 1.44 Nm, followed by MRG 2 and MRG 1. This phenomenon indicated that the improvement of torque performance was dependent on the viscosity of MRGs without the occurrence of sedimentation. Thus, the use of MRG with dilution oil as a substitution of MRF could reduce the sedimentation in MR device and improve the torque performance of MRGs in MR brake. 2022 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/99618/1/KhairulAnwarKadirMMJIIT2022.pdf Abdul Kadir, Khairul Anwar (2022) The effect of dilution oil in the torque performance of magnetorheological grease. Masters thesis, Universiti Teknologi Malaysia. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:150855
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/
language English
topic T Technology (General)
spellingShingle T Technology (General)
Abdul Kadir, Khairul Anwar
The effect of dilution oil in the torque performance of magnetorheological grease
description Magnetorheological (MR) brake is a device that uses MR material to produce braking torque according to induced current. Even though MR Fluid (MRF) is widely used in MR brake as it has high response and is easy to fabricate, the sedimentation issue has degraded the performance of M R brake. Therefore, MR grease (MRG) is introduced to overcome the drawbacks of MRF. Another important benefit of MRG is its self-sealing property which can solve the leaking problem in MRF. Despite the advantageous of no sedimentation of MRG, high viscosity of MRG lower the MR response to the current induced. Thus, the high viscosity of MRG can be reduced by adding dilution oil. Furthermore, the effect of the oil in diluted MRG in MR brake has not been investigated. Several samples of MRGs with different types of dilution oil were prepared by mixing grease and spherical carbonyl iron particles (CIP) using mechanical stirrers. The rheological properties in rotational mode were tested by using rheometer meanwhile the torque performance of MRGs in MR brake were evaluated by changing the current of 0A, 0.4A, 0.8A and 1.2A and fixed the angular speed. The result shows that MRG 3 has the lowest viscosity which is almost 93% reduction while the reduction of viscosity of MRG 2 was 25%. Yet, the torque performances generated by MRG 3 was the highest, 1.44 Nm, followed by MRG 2 and MRG 1. This phenomenon indicated that the improvement of torque performance was dependent on the viscosity of MRGs without the occurrence of sedimentation. Thus, the use of MRG with dilution oil as a substitution of MRF could reduce the sedimentation in MR device and improve the torque performance of MRGs in MR brake.
format Thesis
author Abdul Kadir, Khairul Anwar
author_facet Abdul Kadir, Khairul Anwar
author_sort Abdul Kadir, Khairul Anwar
title The effect of dilution oil in the torque performance of magnetorheological grease
title_short The effect of dilution oil in the torque performance of magnetorheological grease
title_full The effect of dilution oil in the torque performance of magnetorheological grease
title_fullStr The effect of dilution oil in the torque performance of magnetorheological grease
title_full_unstemmed The effect of dilution oil in the torque performance of magnetorheological grease
title_sort effect of dilution oil in the torque performance of magnetorheological grease
publishDate 2022
url http://eprints.utm.my/id/eprint/99618/1/KhairulAnwarKadirMMJIIT2022.pdf
http://eprints.utm.my/id/eprint/99618/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:150855
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