Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

Vasilyeva, M. A.; Nagornov, D. O.; Orlov, G. N.

doi:10.3390/ma14092376

Cited by 9 publications

(5 citation statements)

References 38 publications

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“…The agglomeration of magnetite nanoparticles can appear as an effect of spontaneous magnetization [52] and also by the agglomeration of nanoparticles due to the action of the forces of electrostatic interaction of particles [53]. The movement of the formed assemblies through the microfibers of the fabric is slowed down.…”

Section: Resultsmentioning

confidence: 99%

Composites Based on Cotton Microfibers Impregnated with Magnetic Liquid for Magneto-Tactile Sensors

Bîcă

Iacobescu

2023

Materials

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In this paper, we report the preparation of two new composite materials based on cotton fibers and magnetic liquid consisting of magnetite nanoparticles and light mineral oil. Using the composites and two simple textolite plates plated with copper foil assembled with self-adhesive tape, electrical devices are manufactured. By using an original experimental setup, we measured the electrical capacitance and the loss tangent in a medium-frequency electric field superimposed on a magnetic field. We found that in the presence of the magnetic field, the electrical capacity and the electrical resistance of the device change significantly with the increase of the magnetic field, then, the electrical device is suitable to be used as a magnetic sensor. Furthermore, the electrical response functions of the sensor, for fixed values of the magnetic flux density, change linearly with the increase in the value of the mechanical deformation stress, which gives it a tactile function. When applying mechanical stresses of fixed values, by increasing the value of the magnetic flux density, the capacitive and resistive functions of the electrical device change significantly. So, by using the external magnetic field, the sensitivity of the magneto-tactile sensor increases, therefore the electrical response of this device can be amplified in the case of low values of mechanical tension. This makes the new composites promising candidates for the fabrication of magneto-tactile sensors.

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Section: Resultsmentioning

confidence: 99%

Composites Based on Cotton Microfibers Impregnated with Magnetic Liquid for Magneto-Tactile Sensors

Bîcă

Iacobescu

2023

Materials

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“…In order to describe the mechanisms that contributed to the observed phenomena, we considered the idealized model from Figure 11 . According to this model, magnetite nanoparticles have spontaneous magnetization [ 31 ] and become electrically charged by friction [ 32 ], which will cause agglomeration and micro-ball (NS) formation in the GB fabric. We assumed that the NSs had the same diameter and were uniformly distributed in the fabric.…”

Section: Resultsmentioning

confidence: 99%

A Cotton Fabric Composite with Light Mineral Oil and Magnetite Nanoparticles: Effects of a Magnetic Field and Uniform Compressions on Electrical Conductivity

et al. 2023

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Over the past few decades, tactile sensors have become an emerging field of research with direct applications in the area of biomedical engineering. New types of tactile sensors, called magneto-tactile sensors, have recently been developed. The aim of our work was to create a low-cost composite whose electrical conductivity depends on mechanical compressions that can be finely tuned using a magnetic field for magneto-tactile sensor fabrication. For this purpose, 100% cotton fabric was impregnated with a magnetic liquid (EFH-1 type) based on light mineral oil and magnetite particles. The new composite was used to manufacture an electrical device. With the experimental installation described in this study, we measured the electrical resistance of an electrical device placed in a magnetic field in the absence or presence of uniform compressions. The effect of uniform compressions and the magnetic field was the induction of mechanical–magneto–elastic deformations and, as a result, variations in electrical conductivity. In a magnetic field with a flux density of 390 mT, in the absence of mechanical compression forces, a magnetic pressure of 5.36 kPa was generated, and the electrical conductivity increased by 400% compared to that of the composite in the absence of a magnetic field. Upon increasing the compression force to 9 N, in the absence of a magnetic field, the electrical conductivity increased by about 300% compared to that of the device in the absence of compression forces and a magnetic field. In the presence of a magnetic flux density of 390 mT, and when the compression force increased from 3 N to 9 N, the electrical conductivity increased by 2800%. These results suggest the new composite is a promising material for magneto-tactile sensors.

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“…The basis for the behavior of the new property was established with the classification of substances as conductors or insulators and the establishment of the electrical flow direction from positive to negative. Because they are outside and exposed to the elements, power lines and cables reinforced in the upper portion of transmission line support for the protection of wires from atmospheric overvoltages and direct lightning strikes [23][24][25][26][27] must function under challenging circumstances. Several meteorological events (wind, rain, ice, and temperature variations) and chemical contaminants in the air [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Study of the Heat Equation and the Effect of Temperature Inside an Electric Cable Consisting of Aluminum and Copper Metals

Maturi¹

2023

GEOMATE

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In this paper, we study the mathematical physics model; partial discharge (PD) mapping and power cable fault location are approaches based on the principle of time domain reflection (TDR) measurement, influenced by the power cable's height Frequency wave propagation properties. Furthermore, power cables. They're increasingly being used to transmit electrical energy and communication signals simultaneously. Smart grids are an example of such technology. Power cables are exposed to a variety of temperatures when in use. Changes in the load current flowing through the cable cause differences. As a result, it is essential to Recognize how temperature affects the high-frequency characteristics of power wires. Temperature changes advance Errors in TDR measurements, according to simulations, and result in numerical solutions undertaken in this study. It's also shown that when the cable's temperature rises from25°C to 60°C, the attenuation increases by 1° and the propagation velocity rises by 1°.a 4-percentage-point average The phase constant, on the other hand, drops by order of magnitude on average. The findings imply that temperature effects must be considered while making decisions. Communication channels in power cables are designed.

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Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

Cited by 9 publications

References 38 publications

Composites Based on Cotton Microfibers Impregnated with Magnetic Liquid for Magneto-Tactile Sensors

Composites Based on Cotton Microfibers Impregnated with Magnetic Liquid for Magneto-Tactile Sensors

A Cotton Fabric Composite with Light Mineral Oil and Magnetite Nanoparticles: Effects of a Magnetic Field and Uniform Compressions on Electrical Conductivity

Study of the Heat Equation and the Effect of Temperature Inside an Electric Cable Consisting of Aluminum and Copper Metals

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