scholarly journals Fabrication and Response Analysis of Magnetorheological Elastomer

2012 ◽  
Vol 9 (1) ◽  
pp. 111-116
Author(s):  
S. R. Kumbhar ◽  
Subhasis Maji ◽  
Bimlesh Kumar
Keyword(s):  
Magnetic Field ◽  
Smart Materials ◽  
Response Analysis ◽  
Iron Particles ◽  
Magnetorheological Elastomer ◽  
Percentage Volume ◽  
Distribution Composition ◽  
As Stress ◽  
External Stimuli ◽  
Ferromagnetic Particles

Smart materials are materials with properties that can be significantly altered in a controlled fashion by external stimuli, such as stress, temperature, pH, moisture, electric or magnetic fields. An elastomer comprising a matrix interspersed with micron sized ferromagnetic particles is known as a Magnetorheological Elastomer (MRE). The rheological properties of MREs are altered by the application of an external magnetic field. The characteristic response of MRE is influenced by many factors including; the elastomer matrix, the size, distribution, composition and percentage volume of the ferromagnetic particles, and whether the ferromagnetic particles are aligned in chains or randomly dispersed. During the past two decades the interest in intelligent material based solutions has shown a huge growth. Present work deals with the study of preparation method of Magnetorheological Elastomer mould and testing for its dynamic behaviour. Micron size iron particles are used for the preparation of MRE in order to increase number of iron particles in elastomer matrix. Two different types of MRE moulds are prepared and their dynamic response has been studied. Comparison has been done between MRE mould cured with magnetic field and without magnetic field by testing them with and without application of magnetic field. The results obtained are satisfactory and can be applied for automotive sector to reduce noise and vibrations.

scholarly journals Effects of Filler Distribution on Magnetorheological Silicon-Based Composites

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3017 ◽  
Author(s):  
Sneha Samal ◽  
Marcela Škodová ◽  
Ignazio Blanco
Keyword(s):  
Magnetic Field ◽  
Surface Morphology ◽  
Smart Materials ◽  
Particle Distribution ◽  
Volume Fraction ◽  
Filler Particle ◽  
Iron Particles ◽  
Magnetorheological Elastomer ◽  
Linear Arrangement ◽  
Filler Distribution

The smart materials subclass of magnetorheological elastomer (MRE) composites is presented in this work, which aimed to investigate the influence of filler distribution on surface morphology. Iron particles with sizes ranging from 20 to 150 µm were incorporated into the elastomer matrix and a 30% volume fraction (V%) was chosen as the optimal quantity for the filler amount in the elastomer composite. The surface morphology of MRE composites was examined by 3D micro-computed tomography (µCT) and scanning electron microscopy (SEM) techniques. Isotropic and anisotropic distributions of the iron particles were estimated in the magnetorheological elastomer composites. The filler particle distribution at various heights of the MRE composites was examined. The isotropic distribution of filler particles was observed without any influence from the magnetic field during sample preparation. The anisotropic arrangement of iron fillers within the MRE composites was observed in the presence of a magnetic field during fabrication. It was shown that the linear arrangement of the iron particle chain induced magnetization within the composite. Simulation analysis was also performed to predict the particle distribution of magnetization in the MREs and make a comparison with the experimental observations.

Smart Materials Based on Magnetorheological Composites

2012 ◽  
Vol 714 ◽  
pp. 167-173 ◽  
Author(s):  
Marcin Masłowski ◽  
Marian Zaborski
Keyword(s):  
Magnetic Field ◽  
Smart Materials ◽  
Magnetic Field Effect ◽  
Cross Linking ◽  
Vibrating Sample Magnetometer ◽  
Magnetorheological Elastomer ◽  
Gamma Iron ◽  
Magnetorheological Elastomers ◽  
Elastomer Composites ◽  
Ferromagnetic Particles

Magnetorheological elastomer composites (MREs) based on different magnetoactive fillers such as: carbonyl iron powder (CIP), gamma iron oxide (γ-Fe2O3), micro-and nanosize Fe3O4 are reported and studied. MREs were obtained from various elastomer matrixes such as: ethylene propylene, acrylonitrile butadiene, silicone, ethylene-octene and polyoctenamer rubbers. To align particles in elastomer, cross-linking process took place in magnetic field. Effect of the amount of ferromagnetic particles and their arrangement on the microstructure and properties in relation to the external magnetic field was examined. The microstructure, magnetic and magnetoreological properties of compositions were investigated with scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and ARES Rheometer with magnetic device. Cross-linking density and mechanical properties of the composites were also studied. It was found that microstructure anisotropy has significant effect on the properties of magnetorheological elastomers. Moreover, different amount of magnetoactive fillers influence mechanical and magnetic properties of the vulcanizates. Many essential conclusions occur after application the wide variety of elastomer matrixes filled with different ferromagnetic particles in the context of preparation process of smart materials based on magnetorheological elastomer composites.

Magnetorheological Elastomers: A Review

2014 ◽  
Vol 695 ◽  
pp. 255-259 ◽  
Author(s):  
Nurul Husna Rajhan ◽  
Hanizah Ab Hamid ◽  
Ibrahim Azmi ◽  
Rozaina Ismail
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Rheological Properties ◽  
Size Distribution ◽  
Magnetorheological Elastomer ◽  
Magnetorheological Elastomers ◽  
Innovative Solutions ◽  
Percentage Volume ◽  
Distribution Composition ◽  
Selection Of

This present paper reviews on the material compositions of Magnetorheological elastomer (MRE) as presented by researchers. As the article review, this paper much focuses on the selection of the material in the MRE ingredients. MRE has been known as a new kind of smart material over past decades. MREs offer innovative solutions for various applications in the engineering field since the rheological properties of MREs can be controlled by an external magnetic field. The characteristic responses of MRE are influenced by many factors such its elastomer matrix, the size, distribution, composition, percentage volume of filler particles and so on.

Sensing Behavior of Magnetorheological Elastomers

2009 ◽  
Vol 131 (9) ◽  
Author(s):  
Xiaojie Wang ◽  
Faramarz Gordaninejad ◽  
Mert Calgar ◽  
Yanming Liu ◽  
Joko Sutrisno ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
Magnetic Particles ◽  
External Stimulus ◽  
Magnetorheological Elastomer ◽  
Polymer Medium ◽  
Mechanical Loads ◽  
Magnetorheological Elastomers ◽  
Impedance Response ◽  
Ferromagnetic Particles

A magnetorheological elastomer (MRE) is comprised of ferromagnetic particles aligned in a polymer medium by exposure to a magnetic field. The structures of the magnetic particles within elastomers are very sensitive to the external stimulus of either mechanical force or magnetic field, which result in multiresponse behaviors in a MRE. In this study, the sensing properties of MREs are investigated through experimentally characterizing the electrical properties of MRE materials and their interfaces with external stimulus (magnetic field or stress/strain). A phenomenological model is proposed to understand the impedance response of MREs under mechanical loads and magnetic fields. Results show that MRE samples exhibit significant changes in measured values of impedance and resistance in response to compressive deformation, as well as the applied magnetic field.

Urethane Magnetorheological Elastomers - Manufacturing, Microstructure and Properties

2009 ◽  
Vol 154 ◽  
pp. 107-112 ◽  
Author(s):  
Anna Boczkowska ◽  
Stefan F. Awietjan
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Vibrating Sample Magnetometer ◽  
Iron Particles ◽  
Magnetorheological Elastomers ◽  
Microstructure And Properties ◽  
Ferromagnetic Particles ◽  
Scanning Electron

In this paper studies on urethane magnetorheological elastomers (MREs) microstructure in respect to their magnetic and mechanical properties are reported. MREs were obtained from a mixture of polyurethane gel and carbonyl-iron particles cured in a magnetic field of 100 and 300 mT. The amount of particles was varied from 1.5 to 33 vol. %. Samples with different arrangements of particles were produced. Effect of the amount of ferromagnetic particles and their arrangement on microstructure and properties in relation to the external magnetic field was investigated. The microstructure was studied using scanning electron microscopy. Magnetic properties were measured using vibrating sample magnetometer. Rheological and mechanical properties under compression were also examined.

A state of art on magneto-rheological materials and their potential applications

2018 ◽  
Vol 29 (10) ◽  
pp. 2051-2095 ◽  
Author(s):  
Raju Ahamed ◽  
Seung-Bok Choi ◽  
Md Meftahul Ferdaus
Keyword(s):  
Magnetic Field ◽  
Smart Materials ◽  
Wide Spectrum ◽  
Materials Modeling ◽  
Different Types ◽  
Potential Applications ◽  
Magneto Rheological ◽  
Designed Materials ◽  
External Stimuli ◽  
The Magnetic Field

Smart materials are kinds of designed materials whose properties are controllable with the application of external stimuli such as the magnetic field, electric field, stress, and heat. Smart materials whose rheological properties are controlled by externally applied magnetic field are known as magneto-rheological materials. Magneto-rheological materials actively used for engineering applications include fluids, foams, grease, elastomers, and plastomers. In the last two decades, magneto-rheological materials have gained great attention of researchers significantly because of their salient controllable properties and potential applications to various fields such as automotive industry, civil environment, and military sector. This article offers a recent progressive review on the magneto-rheological materials technology, especially focusing on numerous application devices and systems utilizing magneto-rheological materials. Conceivable limitations, challenges, and comparable advantages of applying these magneto-rheological materials in various sectors are analyzed critically, which provides a clear pathway to the researchers in selecting and utilizing these materials. The review starts with an introduction to the elementary description of magneto-rheological materials and their significant contribution in various fields. Following this, different types of the magneto-rheological materials, modeling of the magneto-rheological materials, magneto-rheological material–based devices, and their applications have been extensively reviewed to promote practical use of magneto-rheological materials in a wide spectrum of the application from the automobile to medical device.

scholarly journals Role of Magnetorheological Fluids and Elastomers in Today’s World

2017 ◽  
Vol 11 (4) ◽  
pp. 267-274 ◽  
Author(s):  
Paweł Skalski ◽  
Klaudia Kalita
Keyword(s):  
Magnetic Field ◽  
Automotive Industry ◽  
Smart Materials ◽  
Magnetorheological Fluids ◽  
Magnetorheological Elastomer ◽  
Shock Absorbers ◽  
Damping Control ◽  
Mr Fluids ◽  
High Tension

AbstractThis paper explains the role of magnetorheological fluids and elastomers in today’s world. A review of applications of magnetorheological fluids and elastomers in devices and machines is presented. Magnetorheological fluids and elastomers belong to the smart materials family. Properties of magnetorheological fluids and elastomers can be controlled by a magnetic field. Compared with magnetorheological fluids, magnetorheological elastomers overcome the problems accompanying applications of MR fluids, such as sedimentation, sealing issues and environmental contamination. Magnetorheological fluids and elastomers, due to their ability of dampening vibrations in the presence of a controlled magnetic field, have great potential present and future applications in transport. Magnetorheological fluids are used e.g. dampers, shock absorbers, clutches and brakes. Magnetorheological dampers and magnetorheological shock absorbers are applied e.g. in damping control, in the operation of buildings and bridges, as well as in damping of high-tension wires. In the automotive industry, new solutions involving magnetorheological elastomer are increasingly patented e.g. adaptive system of energy absorption, system of magnetically dissociable [hooks/detents/grips], an vibration reduction system of the car’s drive shaft. The application of magnetorheological elastomer in the aviation structure is presented as well.

Electrical Properties of Magneto-Rheological Elastomers

2008 ◽  
Author(s):  
Xiaojie Wang ◽  
Faramarz Gordaninejad ◽  
Mert Calgar ◽  
Yanming Liu ◽  
Joko Sutrisno ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electrical Properties ◽  
Magnetic Particles ◽  
External Stimulus ◽  
Magnetorheological Elastomer ◽  
Polymer Medium ◽  
Impedance Response ◽  
Properties Of Materials ◽  
Magneto Rheological ◽  
Ferromagnetic Particles

A magnetorheological elastomer (MRE) is comprised of ferromagnetic particles aligned in a polymer medium by exposure to a magnetic field. The structures of the magnetic particles within elastomers are very sensitive to the external stimulus of either mechanical force or magnetic field, which result in multi-response behaviors in MRE. In this study, sensing properties of MREs through experimentally characterizing the electrical properties of materials and theirs interfaces with external stimulus (magnetic field or stress/strain) are investigated. A phenomenological model is proposed to model the impedance response of MREs. Results show that MRE samples exhibit significant changes in measured values of impedance and resistance in response to compressive deformation, as well as applied magnetic field.

A mechanical characterization of electroconductive magnetorheological elastomer and semi-analytical modeling of magnetic force

2019 ◽  
Vol 33 (25) ◽  
pp. 1950290
Author(s):  
Salah Aguib ◽  
Abdelkader Nour ◽  
Toufik Djedid
Keyword(s):  
Magnetic Field ◽  
Magnetic Force ◽  
Magnetic Field Intensity ◽  
Experimental Characterization ◽  
Iron Particles ◽  
Magnetorheological Elastomer ◽  
Magnetorheological Elastomers ◽  
Global Industry ◽  
The Magnetic Field

Materials with novel properties and compounds of intelligent material combinations are a key to innovation in various successful sectors of the global industry as well as for its export. Magnetorheological elastomer materials have interesting physical properties; most of these properties are modified and adapted under the influence of external parameters such as the magnetic field. In this work, an experimental characterization of the magnetorheological elastomers (MRE) loaded with 20% of the iron particles was made. The results showed that the properties of these materials can be modified very selectively and reversibly under the influence of magnetic field, where the stiffness of the material varies depending on the magnetic field intensity that influences the attractive force between iron particles.

On damping vibrations of three-layered beam containing magnetorheological elastomer

2012 ◽  
Vol 23 (9) ◽  
pp. 1019-1023 ◽  
Author(s):  
Evguenia V Korobko ◽  
Gennadi I Mikhasev ◽  
Zoya A Novikova ◽  
Mikalai A Zhurauski
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Carbonyl Iron ◽  
Viscoelastic Properties ◽  
Nonstationary Vibrations ◽  
Iron Particles ◽  
Natural Vibrations ◽  
Magnetorheological Elastomer ◽  
Layered Beam

In this article, we present the results of investigations of viscoelastic properties of magnetorheological elastomer containing carbonyl iron particles. Frequencies of natural vibrations of three-layered beam, supporting constructions of which are made from aluminum, and the inner layer—from magnetorheological elastomer—are calculated, and the dependence of vibrations on induction of the applied magnetic field is obtained. Nonstationary vibrations of the beam at pulse impact of magnetic field are found.

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