Mechanical Properties of Magneto‐Sensitive Elastomers in a Homogeneous Magnetic Field: Theory and Experiment

Ivaneyko, Dmytro; Toshchevikov, Vladimir; Borin, Dmitry; Saphiannikova, Marina; Heinrich, Gert

doi:10.1002/masy.201450401

Cited by 35 publications

(31 citation statements)

References 41 publications

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“…Magnetorheological elastomers (MRE) usually consist of a soft polymer matrix with magnetic particles dispersed in it [7,8,9,10,11,12]. Recent experimental studies show that MRE exhibit mechanical and electrical property changes under the external magnetic field: magnetorheological effect [13], magnetoresistance effect [14], magnetodielectric effect (MDE) [15], etc. The property changes of MRE may be explained by the displacement of particles inside the matrix.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Magnetodielectric Effect in Magnetorheological Elastomers

Isaev

Семисалова

Alekhina

et al. 2019

IJMS

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We present the results of numerical simulation of magnetodielectric effect (MDE) in magnetorheological elastomers (MRE)—the change of effective permittivity of elastomer placed under the external magnetic field. The computer model of effect is based on an assumption about the displacement of magnetic particles inside the elastic matrix under the external magnetic field and the formation of chain-like structures. Such displacement of metallic particles between the planes of capacitor leads to the change of capacity, which can be considered as a change of effective permittivity of elastomer caused by magnetic field (magnetodielectric effect). In the literature, mainly the 2D approach is used to model similar effects. In this paper, we present a new approach of magnetorheological elastomers simulation—a 3D-model of the magnetodielectric effect with ability to simulate systems of 10 5 particles. Within the framework of the model, three types of particle size distributions were simulated, which gives an advantage over previously reported approaches. Lognormal size distribution was shown to give better qualitative match of the modeling and experimental results than monosized type. The developed model resulted in a good qualitative agreement with all experimental data obtained earlier for Fe-based elastomers. The proposed model is useful to study these novel functional materials, analyze the features of magnetodielectric effect and predict the optimal composition of magnetorheological elastomers for further profound experimental study.

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Section: Introductionmentioning

confidence: 99%

Simulation of Magnetodielectric Effect in Magnetorheological Elastomers

Isaev

Семисалова

Alekhina

et al. 2019

IJMS

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“…This is achieved by analyzing the magnetic potential energy of magnetic particles in MRE under the magnetic field. Based on the magnetic dipole model, Ivaneyko et al [ 26 , 27 ] obtained the magnetic potential energy of magnetic particles in isotropic MRE as a function of the strain ε, which can be expressed by

Section: Experimental Results and Modelingmentioning

confidence: 99%

“…Based on the magnetic dipole model, Ivaneyko et al [ 26 , 27 ] obtained the magnetic potential energy of magnetic particles in isotropic MRE as a function of the strain ε, which can be expressed by

where ϕ and M are the volume content and magnetization of CIPs, respectively. Note, that U ( ε ) in Equation (5) depends on ϕ and M through their combination ϕM , which is the magnetization of MRE material M MRE ( B ) = ϕM [ 27 ]. The magneto-induced modulus Δ E m for an MRE under the magnetic field then can be obtained as the second derivative of magnetic potential energy to ε as follows:

…”

Section: Experimental Results and Modelingmentioning

confidence: 99%

A Magneto-Hyperelastic Model for Silicone Rubber-Based Isotropic Magnetorheological Elastomer under Quasi-Static Compressive Loading

Qiao

Zhang

et al. 2020

Polymers

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A new magneto-hyperelastic model was developed to describe the quasi-static compression behavior of silicone rubber-based isotropic magnetorheological elastomer (MRE) in this work. The magnetization property of MRE was characterized by a vibrating sample magnetometer (VSM), and the quasi-static compression property under different magnetic fields was tested by using a universal testing machine equipped with a magnetic field accessory. Experimental results suggested that the stiffness of the isotropic MRE increased with the magnetic flux density within the tested range. Based on experimental results, a new magneto-hyperelastic model was established by coupling the Ogden hyperelastic model, the magnetization model and the magneto-induced modulus model based on a magnetic dipole theory. The results show that the proposed new model can accurately predict the quasi-static compression property of the isotropic MRE under the tested magnetic flux density and strain ranges using only three model parameters.

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“…Considering the formation of chain structures of ferromagnetic particles of magnetorheological fluids and elastomers [25,26], the suspended ferromagnetic particles form chains, columns, or aggregates along the direction of magnetic field. To explain the above phenomenon, several research methods have been used, including macroscopic mechanical element combination method, macroscopic continuum mechanics, microscopic dipole mechanical method, and finite element method based on multi-field coupling [26][27][28][29]. Based on these methods, many models or theories have been proposed, and two typical theories among them are phase-nuclear theory and field-induced dipole moment theory [30].…”

Section: Introductionmentioning

confidence: 99%

“…Among those models, the main parameters include strength and distribution of magnetic field, properties of particles (volume fraction, size, and microstructures), viscosity of solvent, interface between particle and solvent, and time of action. However, the formation mechanism of particle chains under magnetic field is still unclear [25][26][27][28][29][30], and the testing results are not completely consistent with the theoretical predictions [31,32].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Effect in Micro-Sized Shape Memory Polymer Composite Chains

2019

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Since the shape memory effect (SME) has been confirmed in micron and submicron sized polyurethane (PU) shape memory polymer (SMP), it might be used in novel micro/nano devices even for surgery/operation inside a single cell. In this study, micron sized protrusive PU SMP composite chains are fabricated via mixing ferromagnetic nickel micro powders with PU SMP/dimethylformamide solution and then cured under a low magnetic field. Depending on the amount of nickel content, vertical protrusive chains with a diameter from 10 to 250 µm and height from 200 to 1500 µm are obtained. The SME in these chains is investigated to confirm the SME in SMP composites at microscale. An array of such protrusive chains may be utilized to obtain re-configurable surface patterns in a simple manner for applications, such as remarkable change in wetting and friction ability. Finally, its potential applications for micro electro mechanical systems (MEMS) and biomedical device are proposed.

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Mechanical Properties of Magneto‐Sensitive Elastomers in a Homogeneous Magnetic Field: Theory and Experiment

Cited by 35 publications

References 41 publications

Simulation of Magnetodielectric Effect in Magnetorheological Elastomers

Simulation of Magnetodielectric Effect in Magnetorheological Elastomers

A Magneto-Hyperelastic Model for Silicone Rubber-Based Isotropic Magnetorheological Elastomer under Quasi-Static Compressive Loading

Shape Memory Effect in Micro-Sized Shape Memory Polymer Composite Chains

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