The dynamic mechanical properties of magnetorheological plastomers under high strain rate

Xu, Jiaqi; Wang, Pengfei; Pang, Haoming; Wang, Yunpeng; Wu, Jie; Xuan, Shouhu; Gong, Xinglong

doi:10.1016/j.compscitech.2018.02.030

Cited by 36 publications

(20 citation statements)

References 36 publications

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“…During the shearing process, the particle chains are inclined in the direction perpendicular to the magnetic field in the direction of the shearing motion, thereby forming a certain angle with the direction of the magnetic field. The shear strain rate is different [21], and the angle formed by it is also different. A comparison of the numerical simulation and experimental results is shown in Figure 18.…”

Section: Influence Of Shear Strainmentioning

confidence: 99%

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Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

Luo

Ren

et al. 2019

Journal of Nanomaterials

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Magnetorheological fluid is a new type of smart material that is sensitive to magnetic fields and has controllable performance. It is widely regarded for its unique magnetorheological effect and good rheological properties. For materials, the microstructure determines its macroscopic properties. In order to better study its macroscopic properties, it is necessary to have a more comprehensive understanding and deep understanding of its microstructure. In this paper, the magnetization process of magnetorheological fluid is analyzed from a microscopic point of view. Based on Newton’s second law, the dynamic model of particle motion is established. The magnetic force, repulsive force, and viscous resistance of magnetic particles are analyzed. The finite difference numerical calculation method is used. The velocity-Verlet algorithm simulates the static microstructure chaining process of the magnetorheological fluid and the dynamic chaining process under shear force under different influencing factors. At the same time, a static observation device and a shear observation device were developed to observe the microstructure chaining morphology of magnetorheological fluid under different influencing factors, and to study the dynamic chaining law of magnetorheological fluid under the action of a shear force. Therefore, a reasonable contrast index is established, and the numerical simulation results are compared with the experimental observation results.

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Section: Influence Of Shear Strainmentioning

confidence: 99%

“…Substituting formula (21) into formula (19), the magnetic interaction force that any magnetic dipole W is subjected to is simplified as follows:…”

Section: Force Analysis Of Magnetic Particles From the Microscopic Omentioning

confidence: 99%

Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

Luo

Ren

et al. 2019

Journal of Nanomaterials

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“…For instance, as shown in Figure 3 d, with the increment of the CIPs content from 50 to 70 wt.%, the initial storage modulus, G′ increases from 0.27 to 0.93 MPa, which must be associated to the strengthening effect of CIPs. With the higher CIPs content in the HMRP matrix, the chain structures became denser and complexed, consequently blocking the movement of polymer chains during shear deformation [ 7 ]. Furthermore, in the presence of a magnetic field ( Figure 3 b–d), the HMRP samples present a solid-like viscoelastic behaviour, where G′ > G” values demonstrated a main elastic property.…”

Section: Resultsmentioning

confidence: 99%

“…The materials can be categorized into several groups depending on the type of carrying matrix such as MR fluids, MR elastomers, MR grease, and MR gels [ 1 , 2 , 3 , 4 ]. Recently, a new kind of MR material known as MR plastomer (MRP) has gained a great attention from researchers as it is believed to possess high stability and better MR performance [ 5 , 6 , 7 ]. MRP is prepared by dispersing magnetic particles into a low crosslinking polymer network as a carrying matrix.…”

Section: Introductionmentioning

confidence: 99%

The Rheological Studies on Poly(vinyl) Alcohol-Based Hydrogel Magnetorheological Plastomer

et al. 2020

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The freezing–thawing method has been commonly used in the preparation of polyvinyl alcohol hydrogel magnetorheological plastomer (PVA HMRP). However, this method is complex and time consuming as it requires high energy consumption and precise temperature control. In this study, PVA HMRP was prepared using a chemically crosslinked method, where borax is used as crosslinking agent capable of changing the rheological properties of the material. Three samples of PVA HMRP with various contents of carbonyl iron particles (CIPs) (50, 60, and 70 wt.%) were used to investigate their rheological properties in both steady shear and dynamic oscillation modes. Results showed the occurrence of shear thickening behaviour at low shear rate (γ > 1 s−1), where the viscosity increased with the increased of shear rate. Moreover, the storage modulus of the samples also increased increasing the oscillation frequency from 0.1 to 100 Hz. Interestingly, the samples with 50, 60 70 wt.% of CIPs produced large relative magnetorheological (MR) effects at 4916%, 6165%, and 10,794%, respectively. Therefore, the inclusion of borax to the PVA HMRP can offer solutions for a wide range of applications, especially in artificial muscle, soft actuators, and biomedical sensors.

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“…The application of MR foam is also unique; it has been reported that MR foam has a potential application in acoustic absorption [ 41 ]. On the other hand, MR plastomer is the latest developed MR material with a carrier medium, such as polypropylene glycol and toluene diisocyanate mixture [ 42 , 43 ], polyvinyl alcohol [ 44 , 45 ], and thermoplastic polyurethane [ 46 ], which offers a plasticine-like material that has solid-state between MR gel and MRE. Due to the lack of studies around these forms of MR materials, to the best of our knowledge, there is almost no research involving the incorporation of particle coatings into MR foam and MR plastomer, and therefore in this review, we only focus on the impregnation of coated magnetic particles in the other three MR materials.…”

Section: Introductionmentioning

confidence: 99%

Systematic Review on the Effects, Roles and Methods of Magnetic Particle Coatings in Magnetorheological Materials

et al. 2020

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Magnetorheological (MR) material is a type of magneto-sensitive smart materials which consists of magnetizable particles dispersed in a carrier medium. Throughout the years, coating on the surface of the magnetic particles has been developed by researchers to enhance the performance of MR materials, which include the improvement of sedimentation stability, enhancement of the interaction between the particles and matrix mediums, and improving rheological properties as well as providing extra protection against oxidative environments. There are a few coating methods that have been employed to graft the coating layer on the surface of the magnetic particles, such as atomic transfer radical polymerization (ATRP), chemical oxidative polymerization, and dispersion polymerization. This paper investigates the role of particle coating in MR materials with the effects gained from grafting the magnetic particles. This paper also discusses the coating methods employed in some of the works that have been established by researchers in the particle coating of MR materials.

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The dynamic mechanical properties of magnetorheological plastomers under high strain rate

Cited by 36 publications

References 36 publications

Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

The Rheological Studies on Poly(vinyl) Alcohol-Based Hydrogel Magnetorheological Plastomer

Systematic Review on the Effects, Roles and Methods of Magnetic Particle Coatings in Magnetorheological Materials

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