Magnetorheological Elastomer Composites: The Influence of Iron Particle Distribution on the Surface Morphology

Samal, Sneha; Kolinova, Marcela; Blanco, Ignazio; Poggetto, Giovanni Dal; Catauro, Michelina

doi:10.1002/masy.201900053

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…However, certain differences exist between these two material groups. The most important difference is that magnetic particles in elastomer composites have a very limited ability to move in the matrix [6][7][8]. The change of their position is in practice possible only through elastic deformation of the matrix solid material.…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological Elastomer Stress Relaxation Behaviour during Compression: Experiment and Modelling

et al. 2020

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Materials characterized by magnetorheological properties are non-classic engineering materials. A significant increase in the interest of the scientific community about this group of materials could be observed over the recent years. The results of research presented in this article are oriented on the examination of the said materials’ mechanical properties. Stress relaxation tests were carried out on cylindrical samples of magnetorheological elastomers loaded with compressive stress, for various values of magnetic induction (B1 = 0 mT, B2 = 32 mT, B3 = 48 mT, and B4 = 64 mT) and temperature (T1 = 25 °C, T2 = 30 °C, and T3 = 40 °C). The results of these tests indicate that the stiffness of the examined samples increased along with the increase of magnetic field induction, and decreased along with the increase of temperature. On this basis, it has been determined that: the biggest stress amplitude change, caused by the influence of magnetic field, was σ0ΔB = 12.7%, and the biggest stress amplitude change, caused by the influence of temperature, was σ0ΔT = 11.3%. As a result of applying a mathematical model, it was indicated that the stress relaxation in the examined magnetorheological elastomer, for the adopted time range (t = 3600 s), had a hyperbolic decline nature. The collected test results point to the examined materials being characterized by extensive rheological properties, which leads to the conclusion that it is necessary to conduct further tests in this area.

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Section: Introductionmentioning

confidence: 99%

Magnetorheological Elastomer Stress Relaxation Behaviour during Compression: Experiment and Modelling

et al. 2020

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“…The study discovered that the rheological properties of the material were enhanced after the homogeneous dispersion of the magnetic particles was achieved. Additionally, the 3D images internal structure of the MRE were also investigated, and the simulation result revealed that the distribution of filler particles within the volume, in both isotropic and anisotropic distribution have a significant effect on the properties of MRE [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Mould Orientation on the Field-Dependent Properties of MR Elastomers under Shear Deformation

et al. 2021

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In this study, magnetorheological elastomer (MRE) was fabricated using an electromagnetic device with a new configuration mold at the orientation of 0°, 45° and 90°. This new curing concept enhanced the alignment of carbonyl iron particles (CIPs) within the silicone matrix in the presence of silicone oil (SO) during solidifying, by eliminating air gaps to prevent magnetic flux losses. Using a mold made of steel, which is a magnetic material, the mold functions as a guide for concentrated magnetic flux of 0.315 T to pass through the MRE sample. Scanning electron microscopy (SEM) was used to observe the surface morphology of the fabricated MRE samples particularly the alignment of the CIPs. The field-dependent dynamic properties of the MREs were measured using a rheometer. The analysis implied that the effectiveness of the MRE operating under shear deformation with this curing concept provided the highest magneto-induced modulus of 1.01 MPa when a 45° orientation mold is used, with relative magnetorheological (MR) effect value up to 918%, followed by 0° mold orientation with 0.79 MPa magneto-induced modulus and 646% relative MR effect. The high modulus properties offered by this MRE are believed to be potentially useful in industrial applications where a high range of stiffness is required particularly in the shear direction.

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“…Filler-matrix adhesion was investigated to verify the quality of the composite. The attachment of iron particles within the elastomer matrix was examined using both microscopy and internal volume of the composite [29].…”

Section: Surface Characterization Using Sem and μCt Techniquementioning

confidence: 99%

Magneto-Rheological Elastomer Composites. A Review

et al. 2020

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Magneto-rheological elastomer (MRE) composites belong to the category of smart materials whose mechanical properties can be governed by an external magnetic field. This behavior makes MRE composites largely used in the areas of vibration dampers and absorbers in mechanical systems. MRE composites are conventionally constituted by an elastomeric matrix with embedded filler particles. The aim of this review is to present the most outstanding advances on the rheological performances of MRE composites. Their distribution, arrangement, wettability within an elastomer matrix, and their contribution towards the performance of mechanical response when subjected to a magnetic field are evaluated. Particular attention is devoted to the understanding of their internal micro-structures, filler–filler adhesion, filler–matrix adhesion, and viscoelastic behavior of the MRE composite under static (valve), compressive (squeeze), and dynamic (shear) mode.

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Magnetorheological Elastomer Composites: The Influence of Iron Particle Distribution on the Surface Morphology

Cited by 7 publications

References 27 publications

Magnetorheological Elastomer Stress Relaxation Behaviour during Compression: Experiment and Modelling

Magnetorheological Elastomer Stress Relaxation Behaviour during Compression: Experiment and Modelling

Effect of Mould Orientation on the Field-Dependent Properties of MR Elastomers under Shear Deformation

Magneto-Rheological Elastomer Composites. A Review

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