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Properties of magnetorheological elastomers in crossed AC and DC magnetic fieldsтезисы доклада
- Авторы: Alekhina Yu A., Makarova L.A., Rusakova T.S., Semisalova A.S., Perov N.S.
- Сборник: Book of abstracts VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016)
- Тезисы
- Год издания: 2016
- Место издания: Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch Krasnoyarsk
- Первая страница: 398
- Последняя страница: 398
- Аннотация: Magnetorheological elastomers (MRE) under magnetic field demonstrate effects which characteristics can be controlled by varying the parameters of the elastomer (namely, the material and size of the filler particles, elasticity of the matrix, etc.) and the magnetic field parameters. MREs with barium ferrite particles demonstrate the resonance effect in the presence of crossed AC and DC magnetic fields. Measurements of inductances of the empty coil and the coil with elastomer core were carried out. The core was smaller than the free space inside the coil, so it was able to oscillate within the coil. Calculations of the magnetic permeability were made based on the fact, that inductance of the coil changes when the coil is filled with the elastomer. The dependencies of real and imaginary parts of permeability on AC field frequency have resonance peaks at different values of DC magnetic field strength (figure 1). The sample vibration was considered in frame of elastic rod oscillations model. Under magnetic field the change of dielectric permittivity of the elastomer with conductive particles can be observed – socalled magnetodielectric effect1. This effect lead to a field dependence of capacitance of the elastomer filled capacitor. The permittivity changes under magnetic field due to magnetic particles rearrangement within the elastic carrier matrix. The above-mentioned effects are the examples of transformation of the magnetic field energy into the electrical or mechanical energy of the MRE, which allow to construct converters and actuators. Variation of the resonance frequency with changes in external conditions can be used in construction of various types of wireless detectors, absorbers and modulators of electromagnetic waves at sonic frequencies.
- Добавил в систему: Макарова Людмила Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Text of the abstract | Stranitsyi_iz_EASTMAG-2016_ABSTRACTS-P9-12.pdf | 437,0 КБ | 1 сентября 2016 [perov] |