A study of the magnetic fatigue properties of a magnetorheological elastomer

Lian, Chenglong; Lee, Kwang-Hee; Choi, Seung‐Bok; Lee, Chulhee

doi:10.1177/1045389x18799495

Cited by 10 publications

(10 citation statements)

References 13 publications

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“…In addition, the MRE is generally composed of a material that contains a rubber matrix, minor additives and magnetic carbonyl iron (CI) particles. In such a material, the coalescence of CI particles occurs within an applied magnetic field, which attributes to the hardness, enhanced elastic modulus, and shear modulus [ 20 ]. The typical rubber matrix includes silicone rubber (SR) [ 21 , 22 , 23 ], polybutadiene rubber [ 24 , 25 ], nitrile rubber [ 26 ], and polyurethane (PU) rubber [ 27 , 28 ] and others.…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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Magnetorheological (MR) elastomers become one of the most powerful smart and advanced materials that can be tuned reversibly, finely, and quickly in terms of their mechanical and viscoelastic properties by an input magnetic field. They are composite materials in which magnetizable particles are dispersed in solid base elastomers. Their distinctive behaviors are relying on the type and size of dispersed magnetic particles, the type of elastomer matrix, and the type of non-magnetic fillers such as plasticizer, carbon black, and crosslink agent. With these controllable characteristics, they can be applied to various applications such as vibration absorber, isolator, magnetoresistor, and electromagnetic wave absorption. This review provides a summary of the fabrication, properties, and applications of MR elastomers made of various elastomeric materials.

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Section: Introductionmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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“…Researchers [16], [19] used this specimen for the uniaxial tensile fatigue test in the method for specifying the magnetic field applied during MRE durability testing. The other researchers worked in MRE durability test, however used unfamiliar test geometry such as cube [21], [22], [33], rectangular [20], [25], [27] and cylindrical [22]. Fig.…”

Section: Durability Test Specimenmentioning

confidence: 99%

“…However, modeling is still needed to be elaborated and accompanied by accelerated tests for more timely experimental validation studies [29]. The scanning electron microscopy (SEM) studies were conducted by [15], [17], [21]- [23], [25], [26], [31]- [34], [36]. Before the test, the use of SEM was to justify the homogeneity of the mixture and monitor the interphase material bonding.…”

Section: Durability Evaluationmentioning

confidence: 99%

“…Surprisingly, the MRE sample maintained stable in terms of mechanical properties over long periods of cyclic work has offered a high application potential. Fatigue shearing test on MRE for durability evaluation was conducted by Lian et al [21] Following ASTM E143-13, Standard Test Method for Shear Modulus at Room Temperature. In this study, the shear modulus was found to decrease as the number of fatigue cycles increased for both with and without magnetic fields.…”

Section: Note: (+) = Increased and (-) = Decreasedmentioning

confidence: 99%

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An Overview of Durability Evaluations of Elastomer-Based Magnetorheological Materials

et al. 2020

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Most parts of the failures in structural elements in use were consequences of mechanical durability. Therefore, durability had been one of the critical factors to be considered in designing durable mechanical elements. In magnetorheological elastomer (MRE) materials, the durability process involves different damage mechanisms that result in the degradation of the materials. Increasingly used of outstanding performance of MRE was susceptible to failure under durability performance for various applications. In response to these problems, with limited sources of published articles on MRE durability, an overview of the durability of elastomer based MRE is presented. The study focuses on collecting and analyzing the works including experimental and modeling approaches that have been conducted on MRE durability up to date. Two bibliographic searched databases, Scopus and Web of Science were consulted to collect the final set of articles with the aims to identify current and future trends of MRE durability. Prominence works conducted on MRE durability were also encapsulated in this paper to provide a visual perspective and subsequently motivate researchers to heighten the need for MRE durability investigation.

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“…One of the most important characteristics which make MREs different form MRFs is the possibility to obtain both isotropic and anisotropic configurations during the manufacturing of the samples, which is not possible with MRFs and the availability of hard magnetic materials to be used as particles. The particles within the elastomeric matrix can be homogeneously distributed forming isotropic MREs during the matrix cure, as shown in Figure 1(a), or they can be forced to form chain-like column structures, forming anisotropic MREs as shown in Figure 1(b) due to the application of an external magnetic field (Lian et al, 2015(Lian et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological elastomers characterization under shear loading up to failure: A magneto-mechanical multivariate analysis

Spaggiari

Bellelli

2020

Journal of Intelligent Material Systems and Structures

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This work analyses the shear behavior of magnetorheological elastomers (MRE), a class of smart materials which presents interesting magneto-mechanical properties. In order to determine the effect of several variables at a time, a design of experiment approach is adopted. A set of several samples of MRE was manufactured, by varying the weight fraction of ferromagnetic material inside the viscoelastic matrix and the isotropicity of the material, by adding an external magnetic field while the elastomeric matrix was still liquid. The mechanical behavior of each sample was analyzed by conducting cyclic tests at several shear rates, both with and without an external magnetic field. Moreover, in order to estimate the maximum shear stress, the specimens were loaded monotonically up to failure. Shear stiffness, maximum shear stress and specific dissipated energy were calculated on the basis of the experimental data. The results were analyzed using an Analysis of Variance (ANOVA) to assess the statistical influence of each variable. The experimental results highlighted a strong correlation between the weight fraction of ferromagnetic material in each sample and its mechanical behavior. Moreover, the dissipated energy of the MRE drops down when the magnetic field stiffens the behavior or the shear rate increases. The ultimate failure shear stress is strongly affected by the external magnetic field, increasing it by nearly 50%. The ANOVA on the results provides a simple phenomenological model is built for each output variable and it is compared with the experimental tests. These models produce a fast and fairly accurate prediction of each analyzed response of the MRE under various shear rates and applied magnetic fields.

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A study of the magnetic fatigue properties of a magnetorheological elastomer

Cited by 10 publications

References 13 publications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

An Overview of Durability Evaluations of Elastomer-Based Magnetorheological Materials

Magnetorheological elastomers characterization under shear loading up to failure: A magneto-mechanical multivariate analysis

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