Characterization of Magnetorheological Elastomer (MRE) Engine Mounts

Ladipo, Ismail; Fadly, J. D.; Faris, Waleed Fekry

doi:10.1016/j.matpr.2016.01.029

Cited by 38 publications

(17 citation statements)

References 14 publications

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“…According to formula (6) and because the initial speed of the engine is usually between 600 and 800 rpm, the corresponding vibration data collected by each measuring point can be converted to RMS, and the results are shown in Figures 12-14. e results in Figure 12 show that, on the one hand, the sharp vibration RMS value increases when the idle speed changes from 700 to 750 rpm, while on the other hand, when the idle speed is 800 rpm, the RMS value decreases rapidly, so the resonance effect is produced in the abnormal node structure interval from the steering fixed support to the steering wheel when the idle speed is between 700 and 750 rpm. In addition, the vibration transmission degree on the engine mounting nodes (n 1 , n 2 , n 3 ) can be determined by the vibration isolation rate δ t , which is mainly calculated by the ratio between the vibration-excited RMS value generated by the engine body and the vibration RMS values of the front, the left rear, and the right rear mounts, as follows [34,35]:…”

Section: Idle Vibration Test and Results Analysismentioning

confidence: 99%

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Tang

Ye³

et al. 2020

Shock and Vibration

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The vibration degree of a steering wheel has important reference significance for drivers to evaluate the ride comfort of the whole vehicle. To solve the jitter problem of the steering wheel of a commercial vehicle at idle speed, this work proposes a multinode joint vibration control strategy (MDVC) based on the associated vibration path of the steering wheel. Based on the analysis of the associated vibration transfer paths of the steering wheel, the whole vehicle was divided into a system comprising several nodes. For the decomposed node system, taking the vibration transmission path associated with the target as the research direction, the vibration reduction design of each node system is analyzed step by step. After exploring the possible causes of abnormal vibration of the steering wheel through experimental tests, the abnormal node structure interval was determined. By further extracting the structural model of the steering system from the vehicle, the hammering method was applied to test its modal and related frequency. Furthermore, an improved structure of steering support was also designed, and its fitting degree and modal characteristics were analyzed and compared to the original scheme. The following test results show that the structure improvement greatly reduces the vibration level of the steering wheel, meets the ideal design requirements of the steering wheel vibration reduction, and provides the possibility of weighing the correlation between these hierarchical node systems in whole vehicle.

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Section: Idle Vibration Test and Results Analysismentioning

confidence: 99%

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Tang

Ye³

et al. 2020

Shock and Vibration

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“…Due to their rapidly and reversibly controllable properties, including morphological [ 21 ], tomographical [ 22 ], mechanical [ 23 ], dynamic mechanical [ 24 , 25 , 26 ], magneto-mechanical [ 27 , 28 ], magneto-shear [ 29 ], rheological and melt rheological [ 30 ], complex torsional [ 31 ], physicochemical [ 32 ], thermal [ 33 ], friction and wear [ 34 ], fatigue life [ 35 ], and viscoelastic [ 12 ] properties, as well as a fail-safe feature [ 19 ], MREs have a wide range of applications. These applications include damping and smart sensing in vibration absorbers [ 36 , 37 ] and vibration isolators [ 38 , 39 , 40 , 41 ], other sensing devices [ 42 , 43 ], engine mounts, vehicle seat suspension [ 44 ], adaptive stiffness devices, actuators to control the flow [ 31 ], MR elastic polishing composites [ 45 ], seismic dampers and base isolators [ 46 , 47 , 48 , 49 , 50 ], multilayer MRE-based vibration isolators [ 51 ], MREs embedded beams [ 52 ], variable impedance surfaces, artificial muscles [ 24 ], deformable wings [ 53 ], MRE embedded sandwich plates [ 54 ], adaptive blades [ 55 ], active vibration isolation platforms [ 56 , 57 , 58 ], tunable absorption systems [ 59 ], MREs and MRFs based isolators […”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Isotropic Magnetorheological Elastomers and Their Properties: A Review

et al. 2020

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Magnetorheological elastomers (MREs) are magneto-sensitive smart materials, widely used in various applications, i.e., construction, automotive, electrics, electronics, medical, minimally invasive surgery, and robotics. Such a wide field of applications is due to their superior properties, including morphological, dynamic mechanical, magnetorheological, thermal, friction and wear, and complex torsional properties. The objective of this review is to provide a comprehensive review of the recent progress in isotropic MREs, with the main focus on their properties. We first present the background and introduction of the isotropic MREs. Then, the preparation of filler particles, fabrication methods of isotropic MREs, and key parameters of the fabrication process—including types of polymer matrices and filler particles, filler particles size and volume fraction, additives, curing time/temperature, and magnetic field strength—are discussed in a separate section. Additionally, the properties of various isotropic MREs, under specific magnetic field strength and tensile, compressive, or shear loading conditions, are reviewed in detail. The current review concludes with a summary of the properties of isotropic MREs, highlights unexplored research areas in isotropic MREs, and provides an outlook of the future opportunities of this innovative field.

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“…The MR material can be grouped into several types according to the difference of its carrier matrices, such as MR fluid (MRF), MR elastomer (MRE), MR foam, and MR gel (MRG). As the first developed MR material, MRF has been widely utilised in industrial applications such as vibration dissipation, damping, artificial muscles, drug delivery, valves, and actuators [1][2][3][4]. However, MRF exhibits several drawbacks, such as sedimentation and leaking problems that limit its application [5].…”

Section: Introductionmentioning

confidence: 99%

Solvent Dependence of the Rheological Properties in Hydrogel Magnetorheological Plastomer

Hapipi

Mazlan

Ubaidillah

et al. 2020

IJMS

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Chemically crosslinked hydrogel magnetorheological (MR) plastomer (MRP) embedded with carbonyl iron particles (CIPs) exhibits excellent magnetic performance (MR effect) in the presence of external stimuli especially magnetic field. However, oxidation and desiccation in hydrogel MRP due to a large amount of water content as a dispersing phase would limit its usage for long-term applications, especially in industrial engineering. In this study, different solvents such as dimethyl sulfoxide (DMSO) are also used to prepare polyvinyl alcohol (PVA) hydrogel MRP. Thus, to understand the dynamic viscoelastic properties of hydrogel MRP, three different samples with different solvents: water, DMSO, and their binary mixtures (DMSO/water) were prepared and systematically carried out using the oscillatory shear. The outcomes demonstrate that the PVA hydrogel MRP prepared from precursor gel with water shows the highest MR effect of 15,544% among the PVA hydrogel MRPs. However, the samples exhibit less stability and tend to oxidise after a month. Meanwhile, the samples with binary mixtures (DMSO/water) show an acceptable MR effect of 11,024% with good stability and no CIPs oxidation. Otherwise, the sample with DMSO has the lowest MR effect of 7049% and less stable compared to the binary solvent samples. This confirms that the utilisation of DMSO as a new solvent affects the rheological properties and stability of the samples.

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Characterization of Magnetorheological Elastomer (MRE) Engine Mounts

Cited by 38 publications

References 14 publications

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Research on a Multinode Joint Vibration Control Strategy for Controlling the Steering Wheel of a Commercial Vehicle

Recent Progress in Isotropic Magnetorheological Elastomers and Their Properties: A Review

Solvent Dependence of the Rheological Properties in Hydrogel Magnetorheological Plastomer

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