Design of a stiffness variable flexible coupling using magnetorheological elastomer for torsional vibration reduction

Lee, Kang-Hyun; Park, Jae-Eun; Kim, Young-Keun

doi:10.1177/1045389x19862378

Cited by 26 publications

(17 citation statements)

References 28 publications

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“…A novel MRE isolator to control vibration in vehicles, stiffness and damping is increased with magnetic field in both shear and compression modes were proposed by (Behrooz, Wang and Gordaninejad, 2014a). The work of (Lee, Park and Kim, 2019) consisted of isolating the torsional vibration in a shaft using a cylindrical MRE specimen. The magnetic field was generated around the elastomer using magnets.…”

Section: R a F Tmentioning

confidence: 99%

Magnetorheological elastomer-based variable stiffness flexible coupling for vibration isolation

Syam

Ahmed

Muthalif

et al. 2022

Trans. Can. Soc. Mech. Eng.

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Magnetorheological elastomers (MRE) are smart composite materials by which their mechanical properties, such as stiffness, are changed under a magnetic field. In this article, the introduction of a variable stiffness coupling (VSC) fitted within a shaft for torsional vibration isolation that would adapt and change its attenuation frequency range is presented. The VSC concept on torsional vibration isolation is tested experimentally. MRE samples with 40% volume fraction are fabricated and manufactured using a 3D mold design and fixed within a coupling in a shaft to investigate the magnetic field effect on the torsional rigidity. Impact hammer test is conducted along with an accelerometer to obtain the transmissibility factor analysis. Results show that the vibration level decreases when the magnetic field increases. The 1st natural frequency of the system happened at 26 Hz and moved to 28 Hz when the applied current increases from 0 mT to 12.38 mT. MRE torsional stiffness increased from 37.4 N.m/rad to 61.6 N.m/rad when the current increased from 0 mT to 12.38 mT. The torsional damping coefficient showed a fluctuation in its variation as the damping effect of MR elastomer is ignored

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Section: R a F Tmentioning

confidence: 99%

Magnetorheological elastomer-based variable stiffness flexible coupling for vibration isolation

Syam

Ahmed

Muthalif

et al. 2022

Trans. Can. Soc. Mech. Eng.

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“…For this reason, MREs can be successfully adopted in applications where the controllable and reversible variation of the effective stiffness and damping of a device are desired. Such applications include MREs dynamic vibration absorbers (DVAs) and absorbers [ 3 , 4 , 5 , 6 ], engine mounts [ 7 , 8 ], sound insulation [ 9 ], and smart actuators [ 10 ]. The magneto-mechanical characteristics of MREs in the absence and presence of magnetic fields have been explored in literature [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbonyl Iron Particle Types on the Structure and Performance of Magnetorheological Elastomers: A Frequency and Strain Dependent Study

et al. 2022

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Magnetorheological elastomers (MREs) are smart viscoelastic materials in which their physical properties can be altered when subjected to a varying magnetic field strength. MREs consist of an elastomeric matrix mixed with magnetic particles, typically carbonyl iron particles (CIPs). The magnetic field-responsive property of MREs have led to their wide exposure in research. The potential development and commercialization of MRE-based devices requires extensive investigation to identify the essential factors that can affect their properties. For this reason, this research aims to investigate the impact of CIPs’ type, concentration and coating on the rheological and mechanical properties of MREs. Isotropic MREs are fabricated with four different CIP compositions differing between hard or soft, and coated or uncoated samples. Each MRE composition have three different concentrations, which is 5%, 10%, and 20% by volume. The dynamic properties of the fabricated samples are tested by compression oscillations on a dynamic mechanical analyzer (DMA). Frequency and strain dependent measurements are performed to obtain the storage and loss modulus under different excitation frequencies and strain amplitudes. The emphasis is on the magnetorheological (MR) effect and the Payne effect which are an intrinsic characteristics of MREs. The effect of the CIPs’ type, coating, and concentration on the MR and Payne effect of MREs are elucidated. Overall, it is observed that, the storage and loss modulus exhibit a strong dependence on both the frequency excitations and the strain amplitudes. Samples with hard and coated CIPs tend to have a higher MR effect than other samples. A decrease in the storage modulus and non-monotonous behavior of the loss modulus with increasing strain amplitude are observed, indicating the Payne effect. The results of this study can aid in the characterization of MREs and the proper selection of CIPs grades based on the application.

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“…Kim et al 8,9 and Shin et al 10 proposed an adaptive tunable vibration absorber (ATVA) using MRE to robustly suppress harmonic vibration of a miniature cryogenic cooler under varying disturbance. Lee et al 11 designed a magneto-rheological elastomer flexible coupling whose torsional stiffness can be controlled by an embedded magnetic field generator, and torsional vibration experiments were conducted to validate the performance of the proposed magnetorheological elastomer coupling. Gao et al 12 realized the torsional vibration control of the system in a wide range of excitation frequency by configuring the MRE absorber groups in the system and using the input excitation frequency as the input signal.…”

Section: Introductionmentioning

confidence: 99%

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

Dong

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this research effort, an innovative magneto-rheological variable stiffness and damping torsional vibration absorber (MR-VSDTVB) is proposed, and independent variable damping control and independent variable stiffness control are adopted to suppress the torsional vibration of the transmission system. MR-VSDTVB, based on semi-active control principle, exhibits a compact structure and integrates with magneto-rheological technology. First, the concept of MR-VSDTVB is discussed, and the output torque characteristic of MR-VSDTVB is analytically developed. Then, a prototype is fabricated and tested. A transmission system with MR-VSDTVB is proposed to verify the MR-VSDTVB's effectiveness. The structure and inherent characteristics of the transmission system are analyzed theoretically. Finally, an experimental setup of transmission system with MR-VSDTVB is built. Experimental results indicate that when torsional stiffness of MR-VSDTVB changes, a frequency shift phenomenon occurs; moreover, when torsional damping of MR-VSDTVB changes, the response amplitude of the experimental setup changes regularly; And finally, the on-off control test validates the effectiveness of semi-active control on the torsional vibration suppression of the transmission system. The above results verify the effectiveness of MR-VSDTVB in suppressing the torsional vibration of the transmission system. These findings are expected to expand the application of magneto-rheological technology and variable stiffness and variable damping technology in torsional vibration of transmission systems.

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Design of a stiffness variable flexible coupling using magnetorheological elastomer for torsional vibration reduction

Cited by 26 publications

References 28 publications

Magnetorheological elastomer-based variable stiffness flexible coupling for vibration isolation

Magnetorheological elastomer-based variable stiffness flexible coupling for vibration isolation

Effect of Carbonyl Iron Particle Types on the Structure and Performance of Magnetorheological Elastomers: A Frequency and Strain Dependent Study

Semi-active vibration control of a transmission system using a magneto-rheological variable stiffness and damping torsional vibration absorber

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