Dynamic viscoelasticity and phenomenological model of electrorheological elastomers

Ma, Ning; Zhang, Ziqi; Dong, Xufeng; Wang, Qi; Niu, Chenguang; Han, Baoguo

doi:10.1002/app.45407

Cited by 13 publications

(7 citation statements)

References 34 publications

(35 reference statements)

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“…According to the polarization theory, the ER materials are polarized due to the dielectric mismatch between the insulating liquid and ER materials. 48 High polarizability and fast response time of ER particles are very vital to induce strong ER activity and stable ER rheological performance under shear flow. It is well-known that the polarization theory describes polarization of the ER fluids using the complex dielectric constant ε=ε'-iε'', where the real part ε' and the imaginary part ε'' are the dielectric constant and dielectric loss factor, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Electrorheological Fluids with High Shear Stress Based on Wrinkly Tin Titanyl Oxalate

Zhang

Xing

et al. 2018

ACS Appl. Mater. Interfaces

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Electrorheological (ER) fluids are considered as a type of smart fluids because their rheological characteristics can be altered through an electric field. The discovery of giant ER effect revived the researchers' interest in the ER technological area. However, the poor stability including the insufficient dynamic shear stress, the large leakage current density, and the sedimentation tendency still hinders their practical applications. Herein, we report a facile and scalable coprecipitation method for synthesizing surfactant-free tin titanyl oxalate (TTO) particles with tremella-like wrinkly microstructure (W-TTO). The W-TTO-based ER fluids exhibit enhanced ER activity compared to that of the pristine TTO because of the improved wettability between W-TTO and the silicone oil. In addition, the static yield stress and leakage current of W-TTO ER fluids also show a fine time stability during the 30 day tests. More importantly, the dynamic shear stress of W-TTO ER fluids can remain stable throughout the shear rate range, which is valuable for their use in engineering applications. The results in this work provided a promising strategy to solving the long-standing problem of ER fluid stability. Moreover, this convenient route of synthesis may be considered a green approach for the mass production of giant ER materials.

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Section: Resultsmentioning

confidence: 99%

“…According to the polarization theory, ER materials are polarized because of the dielectric mismatch between the insulating liquid and ER materials . High polarizability and fast response time of ER particles are very vital to induce a strong ER activity and stable ER rheological performance under shear flow.…”

Section: Resultsmentioning

confidence: 99%

Electrorheological Fluids with High Shear Stress Based on Wrinkly Tin Titanyl Oxalate

Zhang

Xing

et al. 2018

ACS Appl. Mater. Interfaces

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“…[17] Electrorheological elastomers (EREs), a new kind of smart material whose stiffness varies with electric field intensity, is a competitive candidate for above problems, attracting increasing attention due to its reversible and controllable stiffness with fast response. [18][19][20] It was traditionally thought that EREs were applied to vibration attenuation or noise-reduction in aircraft, vehicles, machines, buildings, and so on [21][22][23][24][25] in shear mode.…”

Section: Smart Table Tennis Racket With Tunable Stiffness For Diverse Play Styles and Unconventional Technique Trainingmentioning

confidence: 99%

Smart Table Tennis Racket with Tunable Stiffness for Diverse Play Styles and Unconventional Technique Training

Zhou

Wang

Huang

et al. 2021

Adv Materials Technologies

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Smart technologies bring innovation to the life and sports arena. To adapt to diverse play styles and improve unconventional technique of table tennis players, a smart table tennis racket with tunable stiffness based on anisotropic electrorheological elastomers (EREs) is developed. The EREs are prepared in the designed mold under the electric field to form an anisotropic structure that consisted of electrorheological particles and facilitated the generation of interparticle saturation surface polarization and the local electric field. Therefore, the electrorheological property of anisotropic EREs is significantly promoted, attaining a relative electrorheological effect of 17 160% in shear mode, and the incremental shear storage and compression modulus of 5.2 and 6.4 MPa. By applying an electric field, the smart racket successfully changes the trajectory of balls, reduced ejection angle by 11% and increased ejection velocity by 2%.

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“…Unlike MREs, they are responsive to electric fields rather than magnetic fields. Therefore, the heavy electromagnetic coils that are necessary in MRE devices can be abandoned, which gives devices based on EREs such advantages as simpler design, lower weight, and faster response [15,16]. By applying an electric field, the electrostatic interaction between adjacent particles makes the stiffness of the elastomers increase, and the higher electric field will lead to higher stiffness [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Properties and mechanical model of a stiffness tunable viscoelastic damper based on electrorheological elastomers

Yao

Wang

et al. 2020

Smart Mater. Struct.

Self Cite

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Conventional viscoelastic dampers based on common elastomers cannot adjust their stiffness to adapt to complex vibration conditions. To overcome this shortcoming, a novel stiffness tunable viscoelastic (STV) damper is proposed in this study. Electrorheological elastomers (EREs), which present a tunable storage modulus by applying electric fields, were used as the key materials to provide the STV damper with electric field responsive stiffness. A series of experiments was conducted to study the dynamic mechanical properties of the STV damper under different displacement amplitudes, frequencies, and electric field strengths. The results indicated that the force-displacement hysteretic curve of the STV damper depends on displacement amplitude and frequency, and could be actively controlled by the electric field strength. Consequently, the equivalent stiffness, equivalent damping, equivalent damping ratio, and energy dissipation capacity of the STV damper were electric field responsive terms. A mechanical model of the STV damper was established on the basis of the material constitutive. The simulation results obtained by the model agreed well with the experimental data, indicating that the model can be used for semi-active control of the STV dampers.

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Dynamic viscoelasticity and phenomenological model of electrorheological elastomers

Cited by 13 publications

References 34 publications

Electrorheological Fluids with High Shear Stress Based on Wrinkly Tin Titanyl Oxalate

Electrorheological Fluids with High Shear Stress Based on Wrinkly Tin Titanyl Oxalate

Smart Table Tennis Racket with Tunable Stiffness for Diverse Play Styles and Unconventional Technique Training

Properties and mechanical model of a stiffness tunable viscoelastic damper based on electrorheological elastomers

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