Development and damping properties of a seismic linear motion damper with MR fluid porous composite rotary brake

Nakano, Masami; Yang, Jian; Sun, Shuaishuai; Totsuka, Atsushi; Fukukita, Akira

doi:10.1088/1361-665x/abb645

Cited by 10 publications

(7 citation statements)

References 36 publications

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“…The internal porous network can effectively protect the magnetic particle chains (Nakano, 2011). Experimental results showed that the mechanical performance was improved by MRF-PF (Nakano et al, 2020). What’s more, MRF-PF was used in a variable inertial flywheel as the working medium.…”

Section: Introductionmentioning

confidence: 99%

“…Based on these advantages, MRF-PF can be used into vehicle, sensor, and other semi-active control applications. According to the relative works, most research works are focus on the engineering applications to improve the output performance (Dong et al, 2018; Nakano, 2011; Nakano et al, 2020). Preparation and rheological properties of MRF-PF are not tested and further analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Characteristic analysis of a novel magnetorheological fabric composite cored flexible sandwich beam with tunable stiffness

Li,

Dong,

Fei

et al. 2023

Journal of Intelligent Material Systems and Structures

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This paper focuses on the performance improvement and evaluation of a novel flexible sandwich beam incorporated magnetorheological fluid porous fabric (MRF-PF). As a novel MR material, MRF-PF has been introduced, prepared, and measured to analyze the pre-yield property between complex shear modulus and magnetic fields. MRF-PF is used into the flexible sandwich beam as core layer. Pre-yield property with tunable stiffness is used to adjust the dynamic response. Then, a theoretical model is derived which can precisely describe the performance. Based on experimental results, sandwich beam incorporated MRF-PF has a good performance of controllability. When the magnetic field is applied into the free end, the natural frequency decreases with increasing the currents and filling ratio. In contrast, the frequency and amplitude increase when the clamped end is exposed to the magnetic fields. Comparing with other investigations, this proposed sandwich beam incorporated MRF-PF has a larger frequency range. The first and second natural frequency show the increases of 54.8% and 77.2%, respectively. The reduction of amplitude is closely related to the thickness of face plate. Therefore, the performance of the compound sandwich beam can be significantly improved by MRF-PF.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristic analysis of a novel magnetorheological fabric composite cored flexible sandwich beam with tunable stiffness

Li,

Dong,

Fei

et al. 2023

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

show abstract

“…Meanwhile, particle chains can be supported by internal networks to reinforce the output performance [28]. Experimental results show that MRF porous fabric composite (MRF-PF) has no sedimentation after 30 d. The maximum force of MR damper with MRF-PF reaches to 20 kN under the current of 0.5 A [29]. MRF-PF with non-woven fabric had been used in flywheel to adjust the rotational inertia with a range of 27.2% [30].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, investigations of MRF-PF are mainly focus on the improvement of output damping force in engineering applications. MRF-PF is mostly regarded as a carrier to hold MRF in working regions [29,30]. Constitute model of MRF-PF are always ignored.…”

Section: Introductionmentioning

confidence: 99%

Characteristic analysis of magnetorheological fluid porous fabric composite with a novel constitute model

Li¹,

Dong²,

Wang³

et al. 2022

Smart Mater. Struct.

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As a novel material, magnetorheological fluid porous fabric composite (MRF-PF) has not been further analyzed and modeled. In this paper, mechanical properties of MRF-PF are analyzed quantitatively and qualitatively with a novel constitute model. Considering the wall slip, viscoelasticity and internal porous network of MRF-PF, a constitute model of MRF-PF is derived firstly which can describe the performance precisely. According to experimental results, mechanical properties of MRF-PF are different from conventional MR fluid. Shear stress τ decreases first, then increases slowly at off-state. Under low magnetic field, shear stress τ presents the opposite variation. It increases at first, and then decreases rapidly. With the further increase of magnetic field, Shear stress τ increases dramatically at high shear rate. This effect is determined by the internal porous network and absorption degree of MRF-PF. A possible flow mechanism of MRF-PF has been proposed. Comparing with different types of MRF-PFs, pre-immersed MRF-PF without relative rotation has a better performance. The maximum shear stress can reach as high as 62.35 kPa with an increase of 22.37% under the magnetic field of 0.7 T. The corresponding dynamic yield stress τy increases to 55.18 kPa with an increase of 26.6%. What’s more, internal porous network can support the particle chains to reinforce the shear-resistance property. The shear thinning effect of MRF-PF can be improved significantly. However, MR effect of MRF-PF decreases largely. These attractive mechanical properties make MRF-PF a potential choice for critical engineering applications.

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“…Its rheological properties are often described by Bingham, Herschel-Bulkley, and Casson-Plastic models [4,5]. Based on the working mode of MRFs, the MR actuator can be divided into linear [6] and rotary MR actuators [7]. Linear MR actuators have been successfully applied in automobile suspension systems as dampers.…”

Section: Introductionmentioning

confidence: 99%

Improving the comprehensive performance of miniature MR rotary actuators using a lamellar excitation structure

Liu¹,

Zhu²,

Liao³

et al. 2021

Smart Mater. Struct.

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Miniaturization has increasingly become a crucial prerequisite in various magnetorheological (MR) drive application scenarios. Owing to their high controllability and low response time, MR rotary actuators are developed for numerous feasible actuation solutions. However, the incident low degradation efficiency in the miniaturization limits the application of MR rotary actuators. In addition to torque capacity, structural simplification and easy machinability are also essential for miniaturization. In this study, a novel lamellar excitation structure (LES), which is interleaved with induction coils and ring-shaped iron cores, is proposed to improve the comprehensive performance of a miniature MR rotary actuator. The optimisation of the magnetic field distribution is realised by adopting an equivalent magnetic modelling method. The miniature MR actuator is incorporated into a turbine generator to evaluate the torque capability of the proposed LES-incorporated MR actuator via a kinematic model of the rotating shaft. The LES-incorporated MR rotary actuator demonstrates more favourable deceleration efficiency and torque capacity than conventional MR rotary actuators. The speed reduction per unit power Δn/P can be increased by 500% at most. The torque enhancement ratio-to-volume ratio (TEVR) value of LES is approximately 80 times higher than that of other optimised structures. We believe that this study is significant in improving the comprehensive performance of miniature MR rotary actuators, expanding the applications of MR actuators in miniaturised scenarios.

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Development and damping properties of a seismic linear motion damper with MR fluid porous composite rotary brake

Cited by 10 publications

References 36 publications

Characteristic analysis of a novel magnetorheological fabric composite cored flexible sandwich beam with tunable stiffness

Characteristic analysis of a novel magnetorheological fabric composite cored flexible sandwich beam with tunable stiffness

Characteristic analysis of magnetorheological fluid porous fabric composite with a novel constitute model

Improving the comprehensive performance of miniature MR rotary actuators using a lamellar excitation structure

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