Simulations of model magnetorheological fluids in squeeze flow mode

Ruiz-López, José Antonio; Wang, Z. W.; Hidalgo‐Álvarez, R.; Vicente, J. De

doi:10.1122/1.4990641

Cited by 19 publications

(16 citation statements)

References 27 publications

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“…Some particularities of the application of magnetorheological (MR) fluid transmissions in microcompressors and pneumatic chokes had been described in scientific works [21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Theoretical and Experimental Background Of The Micro Choke Wmentioning

confidence: 99%

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Research on Shape Memory Alloys and Magnetorheological Fluids for Use in Pneumatic Actuators

Kibirkštis¹,

Pauliukaitis²,

Vaitasius³

2019

Smart and Functional Soft Materials

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Adaptive vibrating actuators operating under autovibration regime were developed using materials with shape memory (SM). Mechanical characteristics of such type vibroactuators can be adjusted by changing geometrical parameters of chamber or throttle. It allows to expand the application of pneumatic vibroexciters and use them in different technological processes. Pneumatic vibroactuator elements that consist of magnetorheological (MR) fluids are proposed for micro-throttle and microcompressor design. The main properties of used MR materials and theoretical background of their mechanical and physical parameters are presented, some results of experimental and theoretical research of actuators are introduced and conclusions of the performed research are formulated.

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Section: Theoretical and Experimental Background Of The Micro Choke Wmentioning

confidence: 99%

“…x ¼ rs ðÞcos ϕ,y¼ rs ðÞsin ϕ,z¼ zs ðÞ (28) It is known that main curvatures of normal sections on surfaces can be expressed through coefficients of the first and the second Gauss form as follows:…”

Section: Theoretical and Experimental Background Of The Micro Choke Wmentioning

confidence: 99%

Research on Shape Memory Alloys and Magnetorheological Fluids for Use in Pneumatic Actuators

Kibirkštis¹,

Pauliukaitis²,

Vaitasius³

2019

Smart and Functional Soft Materials

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“…Therefore, single chain assumption cannot describe the quasistatic squeeze behavior of MRF. Other models based on single chain assumption (Ruiz-Lopez et al, 2017) also cannot deal with the quasistatic squeeze behavior of MRF. The reason lies in that it’s too ideal to assume only single chains exist in the whole squeeze process and neglect microstructure variations.…”

Section: Introductionmentioning

confidence: 99%

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

Luo

Wang

Liu

et al. 2021

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluid is a novel functional material, of which quasistatic squeeze behavior needs to be quantitatively controlled in industrial applications. Since the quasistatic squeeze behavior has a close relation with microstructure variations, thus it is modeled from a microscopic approach. By analyzing compression of single chains, aggregation from single chains to BCT structure and compression of BCT structure, the initial stress [Formula: see text], yield stress [Formula: see text], yield strain [Formula: see text], and stress in post-yield stage [Formula: see text] are respectively modeled. It is found that they have an exponential dependence on magnetic field strength H and particle volume concentration [Formula: see text], including [Formula: see text], [Formula: see text], and [Formula: see text], etc. By comparing predicted results with measured results, the micro-macro stress model on quasistatic squeeze behavior is well validated. This model can be used to design, manufacture, and control industrial magnetorheological devices.

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“…As MR materials are often used in vibration isolation systems [10] and finishing [11,12], the normal stress generated during the shearing process has a great influence on the overall control effect. The normal stress in MR materials [13][14][15] has been intensively studied, with the main focus on the normal stress in squeeze mode [16][17][18][19]. Lopez-Lopez et al theoretically studied the normal stresses in a shear flow of MR suspensions [20], deriving an expression for the normal stress that contains three terms.…”

Section: Introductionmentioning

confidence: 99%

“…The second term is a result of magnetic field inhomogeneities, and the third term reflects the edge effect. de Vicente et al studied the squeeze flow behavior of model MR fluids using a particle-level simulation methodology [18,21,22]. They also calculated the normal stress with different initial configurations and found that the particle structure had a big influence on the squeeze flow behavior.…”

Section: Introductionmentioning

confidence: 99%

Normal stress in magnetorheological polymer gel under large amplitude oscillatory shear

Pang

Pei

Sun

et al. 2018

Journal of Rheology

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In this study, the normal stress in magnetorheological polymer gel (MRPG) under large amplitude oscillatory shear was investigated using experiments and particle-level simulations. Under large amplitude oscillatory shear, an intensely oscillating normal stress was measured with a period of exactly half the strain period. As the amplitude of the strain increased, the peak of the normal stress increased and the trough decreased. Changes in the normal stress were mainly caused by two factors: the Poynting effect, in which shear produces a normal force perpendicular to the shear direction, and magnetic-induced normal stress, which changes with the particle structure. In MRPG, both effects are related to the particle structure. The particle structure in MRPG with different strain was calculated and the simulation results show that the amplitude of the structural strain in oscillatory shearing is less than that of the applied strain. Additionally, a phase difference was observed between the structural strain and the applied strain. Based on the calculated particle structure, the change in the normal stress was obtained and found to agree well with the experimental results.

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Simulations of model magnetorheological fluids in squeeze flow mode

Cited by 19 publications

References 27 publications

Research on Shape Memory Alloys and Magnetorheological Fluids for Use in Pneumatic Actuators

Research on Shape Memory Alloys and Magnetorheological Fluids for Use in Pneumatic Actuators

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

Normal stress in magnetorheological polymer gel under large amplitude oscillatory shear

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