Abstract
This article focuses on studying the rheological behavior of isotropic and anisotropic magnetorheological elastomers (MREs), made of carbonyl iron microparticles dispersed into a silicone–rubber matrix by considering 20 and 30 wt % of microparticles. Sample sets were prepared for each composition, with and without the application of an external magnetic field. Experimental measurements of the material rheology behavior were carried out by a shear oscillatory rheometer at constant temperature, to determine both the shear storage modulus (G′) and shear loss modulus (G′′) for all characterized samples. Then, experimental data collected from the isotropic and the anisotropic material samples were used to plot the Cole-Cole diagrams to quantify the interfacial adhesion between carbonyl iron microparticles and the silicone-rubber matrix. Furthermore, the Fractional Zener Model (FZM) with two spring-pots in series is used for quantitative analysis of collected experimental data.
Highlights
Magnetorheological elastomers (MREs) are materials that can exhibit variable stiffness and damping properties if subjected to the action of an external magnetic field
The aim of this paper focuses on using the Fractional Zener Model (FZM) to predict the shear storage modulus (G’) and the material shear loss modulus (G”) of a magnetorheological silicone–rubber matrix reinforced with carbonyl iron microparticles
It has been found that when the curing process is carried out under the effect of a magnetic field, alignment of microparticles parallel to the magnetic field is obtained
Summary
Magnetorheological elastomers (MREs) are materials that can exhibit variable stiffness and damping properties if subjected to the action of an external magnetic field. Moucka et al [12] used dielectric spectroscopy to study the extent of magnetic filler within the polymer matrix, by applying a static magnetic field during the curing process They observed that the chain-like clusters of MREs were linked to dielectric relaxations because of the charge transport via the variable range hopping mechanism, something that was not previously observed in isotropic distribution of the magnetic particles. They concluded that increasing filler concentration shortens the mean relaxation time but enhances particle distribution into the polymer matrix material. It is proved that the FZM material model captures the influence that the particle alignment has on the reinforced material, since theoretical predictions follow experimental data well
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
