Temperature effects and temperature-dependent constitutive model of magnetorheological fluids

Li, Haopeng; Jönkkäri, Ilari; Sarlin, Essi; Chen, Fei

doi:10.1007/s00397-021-01302-3

Cited by 17 publications

(5 citation statements)

References 32 publications

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“…On the other hand, the influence of the driving frequency on the viscoelastic properties of the MRFs was studied, resulting in the increment in both the storage and loss moduli as the frequency increased in the absence of a magnetic field. Li et al [57] studied the influence of a temperature increase on the properties of MRFs using different constitutive models, considering the temperature rising from 20 • C to 70 • C. In the viscosity test, the zero-field viscosity of the MRFs decreased with the increasing temperature, as expected, and this phenomenon was more obvious at higher shear rates. The shear stress of the MRFs also decreased significantly with an increasing temperature in the presence of the magnetic field, and a further decrease appeared at higher shear rates.…”

Section: Temperature Effect and Thermal Conductivitymentioning

confidence: 81%

“…(iii) An analysis between the sedimentation and temperature-dependent viscosity-the sedimentation and the viscosity are exponentially reduced as the temperature increases. (iv) Introduction of temperature effect of commercial products-oil and silicone oil-based fluids can typically operate at temperatures from −40 to 150 • C, and water-based fluids are rated from 0 to 70 • C.[[57][58][59][60][61][62]…”

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confidence: 99%

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Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Choi

2023

Micromachines

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Many studies on magnetorheological fluid (MRF) have been carried out over the last three decades, highlighting several salient advantages, such as a fast phase change, easy control of the yield stress, and so forth. In particular, several review articles of MRF technology have been reported over the last two decades, summarizing the development of MRFs and their applications. As specific examples, review articles have been published that include the optimization of the particles and carrier liquid to achieve minimum off-state viscosity and maximum yield stress at on-state, the formulation of many constitutive models including the Casson model and the Herschel–Bulkley (H–B) model, sedimentation enhancement using additives and nanosized particles, many types of dampers for automotive suspension and civil structures, medical and rehabilitation devices, MRF polishing technology, the methods of magnetic circuit design, and the synthesis of various controllers. More recently, the effect of the temperature and thermal conductivity on the properties of MRFs and application systems are actively being investigated by several works. However, there is no review article on this issue so far, despite the fact that the thermal problem is one of the most crucial factors to be seriously considered for the development of advanced MRFs and commercial products of application systems. In this work, studies on the thermal conductivity and temperature in MRFs themselves and their temperature-dependent application systems are reviewed, respectively, and principal results are summarized, emphasizing the following: how to reduce the temperature effect on the field-dependent properties of MRFs and how to design an application system that minimizes the thermal effect. It is noted here that the review summary is organized in a chronological format using tables.

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Section: Temperature Effect and Thermal Conductivitymentioning

confidence: 81%

mentioning

confidence: 99%

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Choi

2023

Micromachines

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“…In contrast, there are relatively few studies on the unsteady models of MREAs (Zhang et al 2010, Shou et al 2019. Besides the influence of inertial effects and other factors on analytical models, some analytical MREA models also consider the influence of temperature on the characteristics of MR fluid to achieve more precise control of MREAs (Li et al 2021).…”

Section: Analytical Mrea Modelsmentioning

confidence: 99%

Adaptive magnetorheological fluid energy absorption systems: a review

Bai,

Zhang,

Choi

et al. 2024

Smart Mater. Struct.

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Since last two decades, magnetorheological (MR) fluids have attracted attention extensively since they can rapidly and continuously control their rheological characteristics by adjusting an external magnetic field. Because of this feature, MR fluids have been applied to various engineering systems. This paper specifically investigates the application of MR fluids in shock mitigation control systems from the aspects of three key technical components: the basic structural design of MR fluid-based energy absorbers (MREAs), the analytical and dynamical model of MREAs, and the control method of adaptive MR shock mitigation control systems. The current status of MR technology in shock mitigation control is presented and analyzed. Firstly, the fundamental mechanical analysis of MREAs is carried out, followed by the introduction of typical MREA configurations. Based on the mechanical analysis of MREAs, the structural optimization of MREAs used in shock mitigation control is discussed. The optimization methods are given from perspectives of the design of piston structures, the layout of electromagnetic coil, and the MR fluid gap. Secondly, the methods of damper modeling for MREAs are introduced with and without the consideration of inertia effect, respectively. Then both the modeling methods and their characteristics are introduced for representative parametric dynamic models, semi-empirical dynamic models, and non-parametric dynamic models. Finally, the control objectives and requirements of the shock mitigation control systems are analyzed, and the current competitive methods for the ideal “soft-landing” control objectives are reviewed. The typical control methods of the MR shock mitigation control systems are discussed, and based on this the evaluation indicators of the control performance are summarized in MR shock mitigation control systems.

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“…The MRF required for the experiment had to have the following characteristics: large dynamic yield strength difference, which ensures that the MRF can influence the friction effect under different magnetic field conditions; temperature resistance, which prevents the heat generated by friction and wear from affecting the experimental results; easy redispersion, the ability to flow back quickly after a pin passes through it; and non-corrosive [27,28]. MRF-132DG has properties such as fast response time, dynamic yield strength, temperature resistance, stiff settling resistance, non-abrasive [29], etc. Thus, MRF-132DG can meet the requirements of this research.…”

Section: Magnetorheological Fluidmentioning

confidence: 99%

Effect of Ferromagnetic Metal Base on Friction and Wear of 3D-Printed Aluminum Alloy Surface under Magnetorheological Fluid Action

Lee

2023

Lubricants

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This study aimed to enhance the friction performance and controllable range of magnetorheological devices by investigating the impact of different materials on the tribological properties within a magnetorheological fluid (MRF) under the influence of a magnetic field. A novel friction-combined structure was proposed, consisting of a ferromagnetic metal base and a metal surface shell fabricated using 3D printing technology. The design offered several advantages: the ferromagnetic base significantly improved the magnetic field control range, the 3D-printed surface shell allowed easy replacement with different materials and textures, and it reduced both development and application costs. In this experimental study, composite samples consisting of metal 3D-printed surfaces and substrates made of different materials were used to evaluate the friction and wear characteristics of the MRF under different magnetic field conditions. Computer numerical control (CNC)-machined surfaces were also included for comparison. The results showed that the ferromagnetic matrix affected the magnetic field size and distribution of the energized coil, resulting in an increase in the friction coefficient, but also an increase in wear. Furthermore, the combination of 3D-printed surfaces with ferromagnetic substrates had a more pronounced effect on the friction coefficient compared to CNC-machined surfaces. Based on these findings, this research concluded that 3D-printed surfaces outperform CNC-machined surfaces in this specific environment. In addition, the proposed design, which combined ferromagnetic bases with 3D-printed surfaces, shows potential for improving the friction performance of friction components. The increase rate of friction coefficient from 0.1459 at no current to 0.2089 at 2.5A was 43.18%. This offers a novel application of 3D printing technology in magnetorheological devices.

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Temperature effects and temperature-dependent constitutive model of magnetorheological fluids

Cited by 17 publications

References 32 publications

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Adaptive magnetorheological fluid energy absorption systems: a review

Effect of Ferromagnetic Metal Base on Friction and Wear of 3D-Printed Aluminum Alloy Surface under Magnetorheological Fluid Action

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