Field-dependent viscoelastic properties of graphite-based magnetorheological grease

Nazmi, Nurhazimah and Nasir, N. A.M and Mohamad, Norzilawati and Mazlan, Saiful Amri and Nordin, Nur Azmah and Shair, Ezreen Farina and A. Rahman, Mukhlis (2022) Field-dependent viscoelastic properties of graphite-based magnetorheological grease. International Journal of Automotive and Mechanical Engineering, 19 (3). pp. 9921-9927. ISSN 2229-8649

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Abstract

This paper highlights the effect of graphite on the dynamic viscoelastic properties of magnetorheological grease (MRG). Two types of MRG namely MRG and graphite-MRG, GMRG with 0 wt.% and 10 wt. % of graphite respectively was synthesized by using a mechanical stirrer. The rheological properties of both sample at various magnetic field strength from 0 to 0.603 T was analyzed via rheometer under oscillatory mode with strain ranging from 0.001 to 1% with fixed frequency at 1 Hz for strain sweep and frequency ranging from 0.1 to 80 Hz at a constant strain of 0.01 % for frequency sweep. Based on the result obtained, the value of storage and loss modulus are dependent on the graphite content. A high value of storage modulus was achieved in the GMRG sample at all applied magnetic field strengths within all frequency ranges. These phenomena related to the contribution of graphite to forming the chain structure with CIPs and offered a more stable and stronger structure as compared with MRG. Moreover, the reduction in the value of loss modulus in GMRG was noticed compared to MRG at on-state conditions reflected by the stable structure obtained by GMRG. Lastly, both samples displayed a strong solid-like (elastic) behavior due to the high value of storage modulus, G’ acquired compared to loss modulus, G’’ at all frequency ranges. Therefore, the utilization of graphite in MRG can be used in wide applications such as brake and seismic dampers.

Item Type:	Article
Uncontrolled Keywords:	Magnetorheological grease, Graphite, Storage modulus, Loss modulus, Viscoelastic properties
Divisions:	Faculty of Electrical Engineering
Depositing User:	mr eiisaa ahyead
Date Deposited:	23 Feb 2023 15:41
Last Modified:	23 Feb 2023 15:41
URI:	http://eprints.utem.edu.my/id/eprint/26244
Statistic Details:	View Download Statistic

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