Analysis of quasistatic squeeze behavior of magnetorheological fluid from the microstructure variations

Luo, Qi; Wang, Yongqing; Liu, Haibo; Wang, Junpeng; Li, Yapeng; Li, Te

doi:10.1177/1045389x20988082

Cited by 10 publications

(6 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The current studies on the normal force of MRF are basically based on experimental methods, generally using a plate-plate rheometer to test the normal force of MRF under different conditions. These studies dealt with the effects of shear rate, strain amplitude, temperature, particle concentration, MRF layer thickness and other factors on the dynamic and static normal force of MRF [11][12][13][14][15][16][17]. Simultaneously, some theoretical models were also developed, and the results showed that the theoretical predictions of the MRF normal force agreed well with the experimental results [8,13].…”

Section: Introductionmentioning

confidence: 90%

Numerical analysis for the normal force of magnetorheological fluids

Zheng,

Lin

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

As one of the most important mechanical parameters of magnetorheological fluids (MRF), the normal force has been studied by a large number of researchers using various experimental equipment and methods. However, it is difficult to reveal the effects of particle microstructure characteristics on the normal force of MRF by experimental methods, especially for such factor as the particle size distribution. To advance this research area, a numerical method for calculating the normal force of MRF is proposed in this study. The accuracy of the simulation model is verified with the experimental results measured by a plate-plate magnetorheometer. The results show that the simulated values agree well with the experimental data, which indicates the feasibility of calculating the normal force of MRF using numerical methods and provides a new research idea for a more intuitive and comprehensive analysis of the normal force characteristics of MRF. Besides, the simulated data show that the increase in magnetic field intensity and particle volume fraction will sufficiently enhance the normal force of MRF and improve the response time of MRF. For the MRF with the same particle volume fraction, a decline in the average particle diameter will increase the normal force. Moreover, increasing the dispersion of particle size of MRF particles can also improve its normal force.

show abstract

Section: Introductionmentioning

confidence: 90%

Numerical analysis for the normal force of magnetorheological fluids

Zheng,

Lin

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…In equation ( 8), r m is the particle radius, H = B/ µ 0 is the magnetic induction intensity, µ is the absolute permeability of the particle, µ s = µ/µ 0 is the relative permeability of the particle, µ 0 = 4π × 10 −7 N A −2 is the vacuum permeability, and χ e = µ s −1 is the effective magnetic susceptibility. Since the external magnetic field is uniform, so B = 0, the particles are only affected by the magnetic force generated by other particles [29,30]. Take particle chain a and b in figure 5 as the research object, and establish the coordinate system as shown in figure 6.…”

Section: Equivalent Magnetic Stiffness Coefficient Kmentioning

confidence: 99%

Study on the influence of composition parameters of magnetorheological fluid on its vibration transmission characteristics

Sun

Liu

Zhao

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

As an intelligent material, magnetorheological fluid (MRF) is used in various applications, such as vibration dampers and automotive engine mounts. In order to study the influence of MRF composition parameters on vibration transfer characteristics, this paper proposes an MRF vibration transmission equivalent model based on the analysis of the interaction between carbonyl iron particles (CIPs) and carrier liquid, calculates the vibration transfer power flow level difference (PLD) of MRF with different composition parameters, and performs experimental verification. The results show that when only the particle diameter changes, the PLD peak increases with increasing particle diameter, and the PLD peak frequency shifts to lower frequencies. When the particle volume fraction gradually increases, and the remaining parameters are kept constant, the PLD peak increases first and then decreases, and the peak frequency shifts to high frequencies. When changing only the carrier liquid viscosity, the PLD peak decreases as the viscosity increases, while the peak frequency is shifted toward the high frequency. The MRF has a maximum frequency shift of 61.6Hz when the particle diameter, particle volume fraction, and carrier liquid viscosity are 8μm, 20% and 0.3 Pa·s, respectively. It is shown that adjusting the composition parameters can change the PLD and vibration suppression band of MRF, and using this feature can help improve the broadband vibration suppression performance of MR devices and the vibration suppression efficiency under specific working conditions, further expanding the application of MRF in the field of vibration control.

show abstract

“…A new intensity theory for the emergence of new forms of transformation of the lattice structure of nanoscale particles in magnetorheological fluids has explained this phenomenon in a scientific way [28]. With a low magnetic induction intensity, a complex structure has appeared inside the magnetorheological fluid with a larger volume fraction, however, the complex structure is not stable enough at this time and is vulnerable to destruction.…”

Section: Observation Experimentsmentioning

confidence: 99%

“…Where, V is the magnetic particles volume, which is always constant during the extrusion process, and f 1 and f 2 are the volume fraction before and after extrusion, respectively. Then the relationship between the post-yield MRF stress and strain can be expressed as [28] H 4…”

Section: Micro-macro Mechanical L Properties In the Extruded Statementioning

confidence: 99%

Macro-mechanical properties of magnetorheological fluids based on body-centered cubic structure

chen

Cai

2022

Mater. Res. Express

View full text Add to dashboard Cite

This paper addresses the problem that the microstructure model of magnetorheological fluid established by traditional single-chain or multi-chain dense rows is unable to accurately describe the rheological behavior and the sudden change of macroscopic mechanical properties under the action of an applied magnetic field, and analyzes the stable cluster-like structure formed by a specific volume fraction of magnetorheological fluids in a micro-narrow channel under the action of external magnetic field and extrusion pressure. This paper also establishes the equations of motion and dynamics of magnetic particles under the action of external magnetic field, analyzes the dynamic evolution of particle microstructure, performs numerical simulations of two-dimensional chaining using Matlab, and establishes a microscopic observation test bench for comparison and verification; and it establishes a model of complex cluster-like structure of magnetorheological fluids body-centered cubic, and analyzes the system energy, stability and force of the body-centered cubic structure based on the minimum system energy theory and Hertzian contact theory; and further establishes a shear yield stress model based on the body-centered cubic microstructure to analyze the macroscopic mechanical properties of magnetorheological fluids, thereby enriching the theoretical system of extrusion strengthening of magnetorheological fluids in the microscale.

show abstract

Analysis of quasistatic squeeze behavior of magnetorheological fluid from the microstructure variations

Cited by 10 publications

References 59 publications

Numerical analysis for the normal force of magnetorheological fluids

Numerical analysis for the normal force of magnetorheological fluids

Study on the influence of composition parameters of magnetorheological fluid on its vibration transmission characteristics

Macro-mechanical properties of magnetorheological fluids based on body-centered cubic structure

Contact Info

Product

Resources

About