Field-Dependent Viscoelastic Properties of Graphite-based Magnetorheological Grease

IF 1 Q4 ENGINEERING, MECHANICAL

International Journal of Automotive and Mechanical Engineering Pub Date : 2022-09-30 DOI:10.15282/ijame.19.3.2022.04.0764

N.A.M. Nasir, Nurhazimah, N. Mohamad, S.A. Mazlan, N.A. Nordin, E.F. Shair, M.A.A. Rahman

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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.

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石墨基磁流变润滑脂的场相关粘弹性性能

研究了石墨对磁流变润滑脂(MRG)动态粘弹性的影响。采用机械搅拌器合成了含石墨量为0 wt.%和含石墨量为10 wt.%的两种MRG。通过流变仪分析了两种样品在0 ~ 0.603 T不同磁场强度下的流变特性，在振荡模式下，应变范围为0.001 ~ 1%，固定频率为1 Hz，应变扫描为0.1 ~ 80 Hz，恒定应变为0.01%，频率扫描为0.1 ~ 80 Hz。根据所得到的结果，存储模量和损耗模量与石墨含量有关。在所有频率范围内的所有外加磁场强度下，GMRG样品都获得了高值的存储模量。这些现象与石墨对cip形成链结构的贡献有关，与MRG相比，石墨提供了更稳定、更强的结构。此外，GMRG的损耗模量值比在稳态条件下的MRG有所降低，这反映在GMRG获得的稳定结构上。最后，由于在所有频率范围内获得的存储模量G′比损耗模量G′高，两种样品都表现出很强的固体样(弹性)行为。因此，石墨在MRG中的应用可以在制动器和减震器等方面得到广泛的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Automotive and Mechanical Engineering ENGINEERING, MECHANICAL-

CiteScore

2.40

自引率

10.00%

发文量

审稿时长

20 weeks

期刊介绍： The IJAME provides the forum for high-quality research communications and addresses all aspects of original experimental information based on theory and their applications. This journal welcomes all contributions from those who wish to report on new developments in automotive and mechanical engineering fields within the following scopes. -Engine/Emission Technology Automobile Body and Safety- Vehicle Dynamics- Automotive Electronics- Alternative Energy- Energy Conversion- Fuels and Lubricants - Combustion and Reacting Flows- New and Renewable Energy Technologies- Automotive Electrical Systems- Automotive Materials- Automotive Transmission- Automotive Pollution and Control- Vehicle Maintenance- Intelligent Vehicle/Transportation Systems- Fuel Cell, Hybrid, Electrical Vehicle and Other Fields of Automotive Engineering- Engineering Management /TQM- Heat and Mass Transfer- Fluid and Thermal Engineering- CAE/FEA/CAD/CFD- Engineering Mechanics- Modeling and Simulation- Metallurgy/ Materials Engineering- Applied Mechanics- Thermodynamics- Agricultural Machinery and Equipment- Mechatronics- Automatic Control- Multidisciplinary design and optimization - Fluid Mechanics and Dynamics- Thermal-Fluids Machinery- Experimental and Computational Mechanics - Measurement and Instrumentation- HVAC- Manufacturing Systems- Materials Processing- Noise and Vibration- Composite and Polymer Materials- Biomechanical Engineering- Fatigue and Fracture Mechanics- Machine Components design- Gas Turbine- Power Plant Engineering- Artificial Intelligent/Neural Network- Robotic Systems- Solar Energy- Powder Metallurgy and Metal Ceramics- Discrete Systems- Non-linear Analysis- Structural Analysis- Tribology- Engineering Materials- Mechanical Systems and Technology- Pneumatic and Hydraulic Systems - Failure Analysis- Any other related topics.