Characterizing the Effect of Temperature and Magnetic Field Strengths on the Complex Shear Modulus Properties of Magnetorheological (Mr) Fluids

Chooi, Weng W.; Oyadiji, S. Olutunde

doi:10.1142/9789812702197_0050

Cited by 4 publications

(8 citation statements)

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“…Se/Sy The temperature and frequency dependent dynamic modulus of thermorheologically simple materials at different temperatures can be shifted into a master curve according to the timetemperature superposition (TTS) principle [15][16][17]. Recently, the application of master curve based on TTS has been extended to describe MR fluid [18] and the multi-phase materials where both components have the similar temperature dependence [19]. The complex modulus function can be described in terms of a single master curve and shift factors as follow:…”

Section: Fmm K=4mentioning

confidence: 99%

Temperature dependent dynamic mechanical properties of Magnetorheological elastomers: Experiment and modeling

Wan

Xiong

Zhang

2018

Composite Structures

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Magnetorheological elastomers (MREs) are a group of smart composite materials which are composed of magnetic particles dispersed in an elastomeric matrix. The controllable dynamic properties of these materials rely on many factors, in which temperature is a significant influencing factor requiring further investigations. In this paper, the dynamic mechanical analysis (DMA) tests have been performed to determine the viscoelastic properties of MREs with different test conditions. Based on the experiment results, the dynamic properties of MREs is modelled respectively by fractional Maxwell model (FMM) and generalized Maxwell model (GMM), and then the master curve of complex modulus is constructed using the time-temperature superposition (TTS) principle. The results show that the transition behavior of the silicon rubber based MRE samples under uniaxial compression occurs at about 50℃. The storage modulus exhibits two different trends with the temperature variation: It first decreases rapidly and then increases slightly or maintains a stable value with increasing temperature.

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Section: Fmm K=4mentioning

confidence: 99%

Temperature dependent dynamic mechanical properties of Magnetorheological elastomers: Experiment and modeling

Wan

Xiong

Zhang

2018

Composite Structures

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“…That is because, the dynamic models can predict the hysteretic behaviour of MR dampers. This hysteretic behaviour is mainly caused by the effects of fluid compressibility, inertia, viscoplasticity, viscoelasticity and possible turbulence effects in MR dampers (Ahmadian and Norris, 2008; Chooi, 2005; Kim et al, 2015; Li and Wang, 2012; Şahin et al, 2010; Singh et al, 2014). Hysteresis can be recognised easily by the loops obtained in the force-velocity diagram of an MR damper that is subjected to a cyclic sinusoidal load.…”

Section: Characteristics Advantages and Limitations Of Numerical mentioning

confidence: 99%

“…On the other hand, it is thought to be the main disadvantage of MR fluids is the sedimentation of relatively denser ferromagnetic particles in carrier fluids. Sedimentation was first researched by Winslow (1953), and it is thought to be the main challenge to the employment of MR fluids in many applications since that date (Chooi, 2005). A typical MR fluid is composed of magnetic micro-sized particles, a carrier fluid and additives in the form of dispersants and surfactants whose main roles are to control particle sedimentation and secure easy mixing of the particles in the carrier fluid (Chooi, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Other disadvantages of MR fluids are reported in the literature, namely temperature rise of MR fluids which affects their viscosity and durability of MR fluids (Gołdasz and Sapiński, 2015b). Many parameters can be grouped under the term of durability, such as (1) safety of MR devices in passive mode, (2) need of a power source which may be a limitation in some devices, (3) the high cost of MR fluids in comparison with conventional fluids, (4) the compatibility of MR fluids in different devices, and (5) the in-use thickening (IUT) problem in which an MR fluid is transferred to a paste due to operation in the activated mode for a long time (Chooi, 2005). It is reported that the IUT problem was identified and overcome by Gołdasz and Sapiński (2015b).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A review on multi-physics numerical modelling in different applications of magnetorheological fluids

Elsaady

Oyadiji

Nasser

2020

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluids involve multi-physics phenomena which are manifested by interactions between structural mechanics, electromagnetism and rheological fluid flow. In comparison with analytical models, numerical models employed for magnetorheological fluid applications are thought to be more advantageous, as they can predict more phenomena, more parameters of design, and involve fewer model assumptions. On that basis, the state-of-the-art numerical methods that investigate the multi-physics behaviour of magnetorheological fluids in different applications are reviewed in this article. Theories, characteristics, limitations and considerations employed in numerical models are discussed. Modelling of magnetic field has been found to be rather an uncomplicated affair in comparison to modelling of fluid flow field which is rather complicated. This is because, the former involves essentially one phenomenon/mechanism, whereas the latter involves a plethora of phenomena/mechanisms such as laminar versus turbulent rheological flow, incompressible versus compressible flow, and single- versus two-phase flow. Moreover, some models are shown to be still incapable of predicting the rheological nonlinear behaviour of magnetorheological fluids although they can predict the dynamic characteristics of the system.

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“…Although the PDMS was not thermorheologically simple material, but it was linearly dependence of temperature and had the same shift factor [33]. The dynamic modulus master curve of an isotropic magnetosensitive elastomer in the absence of magnetic field and the magnitude of complex modulus master curve of an MR fluid under magnetic field were constructed respectively in the literature [34,35] however the statistical analysis of the good-of-fitness were not presented. There is a research gap on the dynamic modulus master curve of anisotropic MREs in the presence of magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on viscoelastic properties of anisotropic magnetorheological elastomers under compression

Wan

Xiong

Zhang

2018

Smart Mater. Struct.

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Magnetorheological elastomers (MREs) are a class of smart materials composed of an elastomer and micron-sized magnetic particles. Besides the loading amplitude and frequency, the elastic and rheological properties of MREs are also dependent on the external magnetic field and temperature. Previous studies focused on the influences of external magnetic field, strain amplitude and frequency on the dynamic properties, however, the temperature effect was rarely reported. In this paper, the dynamic mechanical analysis (DMA) tests were carried out to investigate the viscoelastic properties of the anisotropic MRE samples under various temperatures and magnetic fields. A transition behavior of the anisotropic MRE samples was observed at about 50°C for dynamic modulus. The storage modulus initially decreased with the increasing of temperature up to 50°C and then increased or maintained a stable value when temperature increased until to 60°C. The time-temperature superposition (TTS) principle was extended to construct the dynamic modulus master curve of the MREs by using the horizontal shift factor and the vertical shift factor. The good correlations between the measured and predicted data were confirmed by performing statistical analysis for the goodness of fit. The constructed master curve and shift factors can be used to predict the viscoelastic properties of the MREs beyond the DMA experiment range of temperatures and frequencies.

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Characterizing the Effect of Temperature and Magnetic Field Strengths on the Complex Shear Modulus Properties of Magnetorheological (Mr) Fluids

Cited by 4 publications

References 0 publications

Temperature dependent dynamic mechanical properties of Magnetorheological elastomers: Experiment and modeling

Temperature dependent dynamic mechanical properties of Magnetorheological elastomers: Experiment and modeling

A review on multi-physics numerical modelling in different applications of magnetorheological fluids

Temperature effect on viscoelastic properties of anisotropic magnetorheological elastomers under compression

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