Ultrahigh yield stress in a general electrorheological fluid under compression

Tian, Yu; Zhang, Minliang; Zhu, Xun; Meng, Yonggang; Wen, Shizhu

doi:10.1088/0964-1726/19/3/035009

Cited by 18 publications

(17 citation statements)

References 32 publications

(70 reference statements)

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“…The exponent m is in range of 2.06–2.88, which almost agrees with the theoretical analysis. This result is in agree with that for MR fluids 14 and is similar to that for ER fluids 21 . But comparing with the effect of the magnetic field or original gap distance, the compressive velocity has not strong influence on the changing of compressive stress during the compression.…”

Section: Resultssupporting

confidence: 91%

Compressions of magnetorheological fluids under instantaneous magnetic field and constant area

Wang

Yong-ju

et al. 2021

Sci Rep

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Compressions of magnetorheological (MR) fluids have been carried out under instantaneous magnetic fields. The yield strength of the MR fluid in compressive mode has been derived by assuming that it was a transformed shear flow in Bi-visous model. The compressive stresses have experimentally studied under different magnetic fields, different initial gap distances and different compressive velocities. The nominal yield shear stresses of the compressed MR fluid under different influential factors have been calculated. The compressive stress increased in a power law as the applied magnetic field increased, while it decreased as the initial gap distance and the compressive velocity increased. With the increase of magnetic field, the difference between the nominal yield shear stress curves increased, and the exponents of the power law increased with the increase of the magnetic field strengths. A larger initial gap distance and a lower compressive velocity resulted in a higher nominal yield shear stress under the same instantaneous magnetic field. The achieved results of the nominal yield shear stress with magnetic field seemed to deviate from the prediction of dipole model, and the chain structure aggregation effect, the sealing effect and the friction effect by compression should be considered.

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Section: Resultssupporting

confidence: 91%

Compressions of magnetorheological fluids under instantaneous magnetic field and constant area

Wang

Yong-ju

et al. 2021

Sci Rep

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“…23. [207][208][209] In the compression test along the direction of the electric field, the compressive stress obtained represents the resistance of the ER fluid. Compared to the shear yield stress (measured by the HAAKE RV20 rheometer) and tensile yield stress in elongation, the compressive stress taken from the end point of the compression tested showed the highest value (Fig.…”

Section: Compressive Stressmentioning

confidence: 99%

Electrorheological fluids: smart soft matter and characteristics

2012

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An electrorheological fluid, a special type of suspension with controllable fluidity by an electric field, generally contains semiconducting or polarizable materials as electro-responsive parts. These materials align in the direction of the applied electric field to generate a solid-like phase in the suspension. These electro-responsive smart materials, including dielectric inorganics, semiconducting polymers and their hybrids, and polymer/inorganic composites, are reviewed in terms of their mechanism, rheological analysis and dielectric characteristics.

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“…23,24 By investigating the performance of ER uids subjected to compressive loading, EI Wahed found the imposed force was highly dependent on the applied voltage and the weight fraction of the dispersed solid-phase. 25 Liu et al studied the normal force of the ER uid employed for the haptic application, showing the application of the usage of compression mode.…”

Section: 22mentioning

confidence: 99%

The normal stress of an electrorheological fluid in compression mode

et al. 2017

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This work studied the normal stress of an ER fluid in compression mode through both experiment and simulation. The TiO 2 based ER fluid was used to test the normal stress under different DC voltages and compressive speeds. The normal stress reached about tens of kPa and was affected by the applied voltage and compressive parameters. Then, a simulation model was presented to investigate the influencing factors on the normal stress. The computational normal stresses agreed well with the experimental results. Typically, the shear action was also found to be very important for the normal stress during the compression. When the shear rate is small, the shear action showed little effect on normal stress. When the shear rate exceeded a critical value, the normal stress oscillated within a certain range. At last, an ideal 2D simulation was conducted to investigate the relation between the mechanical property and the structure transformation.

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Ultrahigh yield stress in a general electrorheological fluid under compression

Cited by 18 publications

References 32 publications

Compressions of magnetorheological fluids under instantaneous magnetic field and constant area

Compressions of magnetorheological fluids under instantaneous magnetic field and constant area

Electrorheological fluids: smart soft matter and characteristics

The normal stress of an electrorheological fluid in compression mode

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