The Mechanical Properties of a Novel STMR Damper Based on Magnetorheological Silly Putty

Lin, Xiao-guo; Guo, Fei; Du, Chengbin; Yu, Guangchuang

doi:10.1155/2018/2681461

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…Moreover, it was noticed that t G′ was higher than G″ for all samples at higher frequency, which indicated stiffer samples. The result suggests that the materials transformed to a harder state in response to the external shear stress in terms of shear frequency, which signifies the ST effect phenomenon [30]. Prior to the change of ST effect in the PVA-based MRP samples, it was important to determine the physical state of the PVA-based MRP to distinguish the states of liquid-like and solid-like PVA-based MRP by analyzing variation of G′ and G″ as a function of frequency.…”

Section: Shear Stiffening Effect Of Hydrogel Mrpmentioning

confidence: 90%

Dual Properties of Polyvinyl Alcohol-Based Magnetorheological Plastomer with Different Ratio of DMSO/Water

Hapipi

Mazlan

Ubaidillah

et al. 2021

Sensors

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Polyvinyl alcohol (PVA)-based magnetorheological plastomer (MRP) possesses excellent magnetically dependent mechanical properties such as the magnetorheological effect (MR effect) when exposed to an external magnetic field. PVA-based MRP also shows a shear stiffening (ST) effect, which is very beneficial in fabricating pressure sensor. Thus, it can automatically respond to external stimuli such as shear force without the magnetic field. The dual properties of PVA-based MRP mainly on the ST and MR effect are rarely reported. Therefore, this work empirically investigates the dual properties of this smart material under the influence of different solvent compositions (20:80, 40:60, 60:40, and 80:20) by varying the ratios of binary solvent mixture (dimethyl sulfoxide (DMSO) to water). Upon applying a shear stress with excitation frequencies from 0.01 to 10 Hz, the storage modulus (G′) for PVA-based MRP with DMSO to water ratio of 20:40 increases from 6.62 × 10−5 to 0.035 MPa. This result demonstrates an excellent ST effect with the relative shear stiffening effect (RSTE) up to 52,827%. In addition, both the ST and MR effect show a downward trend with increasing DMSO content to water. Notably, the physical state of hydrogel MRP could be changed with different solvent ratios either in the liquid-like or solid-like state. On the other hand, a transient stepwise experiment showed that the solvent’s composition had a positive effect on the arrangement of CIPs within the matrix as a function of the external magnetic field. Therefore, the solvent ratio (DMSO/water) can influence both ST and MR effects of hydrogel MRP, which need to be emphasized in the fabrication of hydrogel MRP for appropriate applications primarily with soft sensors and actuators for dynamic motion control.

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Section: Shear Stiffening Effect Of Hydrogel Mrpmentioning

confidence: 90%

Dual Properties of Polyvinyl Alcohol-Based Magnetorheological Plastomer with Different Ratio of DMSO/Water

Hapipi

Mazlan

Ubaidillah

et al. 2021

Sensors

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“…When the external magnetic field is removed, there is no remanence and coercivity, so it has outstanding controllability and response characteristics in damping applications [9]. Magnetic fluids should not be confused with magnetorheological fluid (MRF); MRF had been widely used in damping in early studies due to the large damping force [10,11]. However, MRF is prone to aggregation and precipitation, and it has the disadvantage of poor stability [12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Analysis and Experimental Research on Damping Performance of a Novel Magnetic Fluid Damper

Yang

Wei

et al. 2021

Advances in Materials Science and Engineering

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Considering the low-frequency and large-amplitude vibration characteristics of the high-rise structure, a tuned magnetic fluid rolling-ball damper is proposed to suppress the vibration of the structure. By adjusting the external magnetic field to control the natural rolling frequency of the ball, the purpose of tuning vibration reduction is achieved. Firstly, the working principle of the damper is theoretically analysed, a three-dimensional (3D) magnetic-fluid-solid multiphysical field coupling mathematical model of the damper is established and the governing equations of multiphysical field coupling are derived. Secondly, the magnetic field distribution and operating characteristics of the damper are simulated and analysed. Finally, the effectiveness of the model is verified by experiments, and the damping performance of the damper with two kinds of magnetic fluid is tested and compared. The results show that the magnetic-fluid-solid multiphysical field coupling model can accurately simulate the working characteristics of the damper. The maximum damping force of the damper is about 12% of the elastic force of the structure, which can increase the damping ratio of the structure by about two times, effectively reduce the vibration response time, and suppress the vibration of the high-rise structure.

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“…In contrast to MR fluid, the MR gel is more stable and can offer more favorable and convenient conditions for engineering applications. Therefore, with its excellent performance in magnetorheology, the MR gel is expected to be used as a new alternative material for intelligent devices, such as magneto-dampers, energy absorbers, and vibration isolations (Lin et al, 2018;O'Driscoll et al, 2018;Petare and Jain, 2018).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Magneto-Electro-Mechanical Response of Physical Cross-Linked Magneto-Electric Polymer Gel

Fan

Wang

et al. 2021

Front. Mater.

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This work reports on a novel magnetorheological polymer gel with carbon nanotubes and carbonyl iron particles mixed into the physical cross-linked polymer gel matrix. The resulting composites show unusual nonlinear magneto-electro-mechanical responses. Because of the low matrix viscosity, effective conductive paths formed by the CNTs were mobile and high-performance sensing characteristics were observed. In particular, due to the transient and mutable physical cross-linked bonds in the polymer gel, the electromechanical behavior acted in a rate-dependent manner. External stimulus at a high rate significantly enhanced the electrical resistance response during mechanical deformation. Meanwhile, the rheological properties were regulated by the external magnetic field when magnetic particles were added. This dual enhancement mechanism further contributes to the active control of electromechanical performance. These polymer composites could be adopted as electromechanical sensitive sensors to measure impact and vibration under different frequencies. There is great potential for this magnetorheological polymer gel in the application of intelligent vibration controls.

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The Mechanical Properties of a Novel STMR Damper Based on Magnetorheological Silly Putty

Cited by 17 publications

References 11 publications

Dual Properties of Polyvinyl Alcohol-Based Magnetorheological Plastomer with Different Ratio of DMSO/Water

Dual Properties of Polyvinyl Alcohol-Based Magnetorheological Plastomer with Different Ratio of DMSO/Water

Numerical Simulation Analysis and Experimental Research on Damping Performance of a Novel Magnetic Fluid Damper

Nonlinear Magneto-Electro-Mechanical Response of Physical Cross-Linked Magneto-Electric Polymer Gel

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