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Papers by gennady gennady
PROCEEDINGS OF INTERNATIONAL CONFERENCE OF YOUNG SCIENTISTS AND STUDENTS “TOPICAL PROBLEMS OF MECHANICAL ENGINEERING” ToPME 2021: Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN)
New anisotropic silicone magnetoactive composites were synthesized and studied. The surface struc... more New anisotropic silicone magnetoactive composites were synthesized and studied. The surface structure and filler microdimensions in these elastomers were determined by electron microscopy. The atomic force microscopy use made it possible to determine significant surface deformations and magnetostrictive effects when small external magnetic fields are applied to the composites. Mössbauer spectroscopy o n iron isotope nuclei made it possible to identify the fillers hyperfine parameters.
International Journal of Molecular Sciences
Nanoplatforms applied for the loading of anticancer drugs is a cutting-edge approach for drug del... more Nanoplatforms applied for the loading of anticancer drugs is a cutting-edge approach for drug delivery to tumors and reduction of toxic effects on healthy cells. In this study, we describe the synthesis and compare the sorption properties of four types of potential doxorubicin-carriers, in which iron oxide nanoparticles (IONs) are functionalized with cationic (polyethylenimine, PEI), anionic (polystyrenesulfonate, PSS), and nonionic (dextran) polymers, as well as with porous carbon. The IONs are thoroughly characterized by X-ray diffraction, IR spectroscopy, high resolution TEM (HRTEM), SEM, magnetic susceptibility, and the zeta-potential measurements in the pH range of 3–10. The degree of doxorubicin loading at pH 7.4, as well as the degree of desorption at pH 5.0, distinctive to cancerous tumor environment, are measured. Particles modified with PEI were shown to exhibit the highest loading capacity, while the greatest release at pH 5 (up to 30%) occurs from the surface of magnetit...
SN Applied Sciences
Creation of and the following research on systems featuring elastomer filled with a magnetic disp... more Creation of and the following research on systems featuring elastomer filled with a magnetic disperse material with good electroconductive properties have been a continuation of the development of magnetorheological fluids with the goal of finding compositions exhibiting a stronger magnetorheological effect. More profound investigations have revealed that composite materials of the given type also exhibit other significant features such as magnetodeformation, magnetostriction, field-induced shape memory, and piezomagnetoresistance, for which reason they are frequently classified as ‘magnetoactive elastomers’. Within the frames of this work, investigations of relationships between the electroconductive and dielectric properties of the polymer composite and external magnetic fields have been done. As has been shown by the experiments, changing the external magnetic field from zero to 330 mT causes the best samples to improve their conductive properties by six orders of magnitude. At t...
International Scientific and Practical Symposium "Materials Science and Technology" (MST2021)
New anisotropic silicone magnetically active elastomers were synthesized and studied. Significant... more New anisotropic silicone magnetically active elastomers were synthesized and studied. Significant surface deformations and magnetostrictive effects in the obtained composites under the application of small external magnetic fields were visualized by the atomic force microscopy methods. This opens up the controlled wrinkling possibility for micro-and nanostructured surfaces. The use of nuclear gamma resonance made it possible to identify the iron filler electronic configuration in these anisotropic composites.
Physical Sciences Reviews, 2020
The paper gives an overview of tunable elastic magnetic composites based on silicon rubber matrix... more The paper gives an overview of tunable elastic magnetic composites based on silicon rubber matrix highly filled with a magnetic soft and hard filler. The magnetic soft phase, which is represented by iron microparticles, allows active control of the physical properties of the composites, while the magnetically hard phase (e.g. neodymium–iron–boron alloy microparticles) is mainly responsible for passive adjustment of the composite. The control is performed by the application of an external magnetic field in situ, and passive adjustment is performed by means of pre-magnetization in order to change material remanent magnetization, i.e. the initial state. The potential and limits of active control and passive tuning of these composites in terms of their magneto-mechanical behavior are presented and discussed.
Smart Materials and Structures, 2020
In this study, we report on the experimentally observed phenomenon of ring-like structures format... more In this study, we report on the experimentally observed phenomenon of ring-like structures formation from chains of magnetic microparticles in magnetoactive elastomers based on magnetic hard powder. In order to find an explanation for the specific macroscopic magnetic properties of composites, microstructural observations on the elastic composite based on a thin layer of magnetic hard particles have been carried out. Particles embedded in such magnetic composites can move inside the matrix with some restrictions and form chain-like structures on being subjected to magnetizing and turn over as first the strength of the external magnetic field decreases and then the polarity of the field switches to opposite. The quantitative parameters of these processes depend on a number of factors including coercivity and remanence of particles, polymer matrix elasticity, and external field intensity. In zero-field, the magnetized particles can assemble into ring-like structures, thus tending to b...
Polymers, 2021
Dielectric properties of two series of magnetoactive elastomers (MAEs) based on a soft silicone m... more Dielectric properties of two series of magnetoactive elastomers (MAEs) based on a soft silicone matrix containing 35 vol% of magnetic particles were studied experimentally in a wide temperature range. In the first series, a hybrid filler representing a mixture of magnetically hard NdFeB particles of irregular shape and an average size of 50 μm and magnetically soft carbonyl iron (CI) of 4.5 μm in diameter was used for MAE fabrication. MAEs of the second series contained only NdFeB particles. The presence of magnetically hard NdFeB filler made it possible to passively control MAE dielectric response by magnetizing the samples. It was shown that although the hopping mechanism of MAEs conductivity did not change upon magnetization, a significant component of DC conductivity appeared in the magnetized MAEs presumably due to denser clustering of interacting particles resulting in decreasing interparticle distances. The transition from a non-conducting to a conducting state was more prono...
New silicone magnetoactive elastomers have been investigated. Changes in elastic properties and r... more New silicone magnetoactive elastomers have been investigated. Changes in elastic properties and resonance frequencies shifts in the investigated composite materials samples at the imposition external constant magnetic fields have been fixed by dynamic testing methods on vibration test benches. The method is developed and a calculation example necessary deformation creation in a magnetoactive material by means of electromagnetic fields influence is shown. The given technique of using the influence on the polymer elastic material by the electromagnetic field creates the possibility, by means of the given program specifications, to support the necessary decision on changing the dynamic characteristics (in accordance with the task changing factors in view). The material under development has a direct relation to robotics sensation, to creation of materials which are also called "smart materials". The studies show their possible application as intelligent sensors or sensors with magnetic field force feedback, which transmit signals to the computer's software control unit to support optimal decisions for "soft robotics" specified by the technical conditions. The material can be adapted as a touch sensor, allowing robots to feel the change in elastic properties in the object being contacted. The results show that it is possible to create structures for use in robotic devices based on electrically and magnetically controlled elastic polymer materials, providing a number of advantages over those currently in use.
Physica A: Statistical Mechanics and its Applications, 2018
The paper deals with theoretical study of hysteretic magnetostriction of soft ferrogelscomposite ... more The paper deals with theoretical study of hysteretic magnetostriction of soft ferrogelscomposite materials, consisting of the micron-sized magnetizable particles embedded into gel matrices. It is supposed that initially, before application of an external magnetic field, the particles are homogeneously and isotropically distributed in an elastic matrix. The theoretical explanation of the hysteresis phenomena is based on the conception that, under the field action, the particles rearrange into the linear chain-like aggregates. The typical length of the chains is determined by the competition between the force of magnetic attraction of the particles and the force of elastic deformation of the matrix.
Russian Journal of Electrochemistry, 2021
Aimed at creating a magnetic filling material with improved electroconducting properties for nove... more Aimed at creating a magnetic filling material with improved electroconducting properties for novel magneto-controllable composites, a method has been developed of electroplating metals onto particles of carbonyl iron powders of various shapes and sizes. The experimentally observed improvement in the effective conductivity of thus produced products can reach several orders of magnitude. This type of fillers may be used in preparation of magnetic elastomers which feature composite materials with the electric resistance strongly dependent on the external magnetic field (also known as the magnetoresistance effect). To achieve the latter one needs a high concentration of filler particles with good magnetic and electroconducting properties.
The motion of a magnetizable elastic body in an alternate magnetic field is experimentally studie... more The motion of a magnetizable elastic body in an alternate magnetic field is experimentally studied. The body of a cylindrical form (worm) is located in a cylindrical channel. By an electromagnetic system a traveling magnetic field is generated. The agreement experimental data with theoretical results is obtained.
PROCEEDINGS OF THE III INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES IN MATERIALS SCIENCE, MECHANICAL AND AUTOMATION ENGINEERING: MIP: Engineering-III – 2021, 2021
New anisotropic silicone magnetically active elastomers were synthesized and investigated by micr... more New anisotropic silicone magnetically active elastomers were synthesized and investigated by microscopy and spectroscopy. The record magnetostriction value in the obtained composites was determined by dynamic force microscopy, and their surface original wrinkled microstructure was visualized. The anisotropic elastomers surface topography changing by small external magnetic fields was found. Mössbauer spectroscopy use allowed determining the iron filler electronic configuration parameters in these composites. The obtained results were discussed and the conclusions about these materials prospects for practical applications were drawn.
Physical Sciences Reviews, 2020
Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials... more Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the mat...
Magnetic Hybrid-Materials, 2021
Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials... more Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the material even after external field removal. In addition, applying a reverse field causes them to turn into the polymer as they rearrange into new ring-like structures. Exploration of the relationship between the rheological properties and magnetic field conducted on a rheometer using vibrational mechanical analysis showed an increase of the relative elastic modulus by more than two orders of magnitude or by 3.8 MPa, whereas the loss factor exhibited steady growth with the field up to a value of 0.7 being significantly higher than that demonstrated by elastomers with no magnetically hard particles. At the same time, measuring the electroconductivity of elastomers filled with a nickel-electroplated carbonyl iron powder made it possible to observe that such composites demonstrated an increase of variation of the resistivity of the composite influenced by magnetic field in comparison to elastomers containing untreated iron particles. The studies conducted indicate that this material exhibits both magnetorheological and
V International Scientific and Technical Conference «Mechanical Science and Technology Update», 2021
На виброиспытательном комплексе изучены динамические свойства магнитоактивных эластомеров на осно... more На виброиспытательном комплексе изучены динамические свойства магнитоактивных эластомеров на основе силиконовой полимерной матрицы с различными ферромагнитными наполнителями в условиях воздействия внешних магнитных полей. По результатам полученных при виброиспытаниях опытных данных построены амплитудно-частотные характеристики и установлены закономерности изменения резонансных частот исследованных композитов при таких воздействиях. Приведены расчётные зависимости для определения демпфирующих свойств испытуемых образцов. Анализ полученных данных установил уменьшение коэффициентов демпфирования в исследуемых материалах по мере увеличения магнитных сил, воздействующих на исследованные композиты магнитоактивных эластомеров.
IOP Conference Series: Materials Science and Engineering, 2020
The paper describes experimental research into the dynamic properties of magnetoactive elastic po... more The paper describes experimental research into the dynamic properties of magnetoactive elastic polymers. Tests on a vibrostendshow that in certain ranges the test material is able to change the frequency of resonance vibrations under the influence of magnetic fields. Experimental data obtained during testing a sample of magnetorheological elastomer under the load produced by an unbalanced rotor of an electric motor are presented. The results of impact load action are shown.
MATEC Web of Conferences, 2020
Experimental studies of the magnetorheological elastomer dynamic properties under the influence o... more Experimental studies of the magnetorheological elastomer dynamic properties under the influence of vibrations and magnetic fields have been carried out. Amplitude-frequency characteristics of these composites were studied. The computational modeling was made and a device for creation and control of magnetoactive composite movements was developed. The interrelation of the obtained characteristics with the materials microstructure features was deduced.
PROCEEDINGS OF INTERNATIONAL CONFERENCE OF YOUNG SCIENTISTS AND STUDENTS “TOPICAL PROBLEMS OF MECHANICAL ENGINEERING” ToPME 2021: Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN)
New anisotropic silicone magnetoactive composites were synthesized and studied. The surface struc... more New anisotropic silicone magnetoactive composites were synthesized and studied. The surface structure and filler microdimensions in these elastomers were determined by electron microscopy. The atomic force microscopy use made it possible to determine significant surface deformations and magnetostrictive effects when small external magnetic fields are applied to the composites. Mössbauer spectroscopy o n iron isotope nuclei made it possible to identify the fillers hyperfine parameters.
International Journal of Molecular Sciences
Nanoplatforms applied for the loading of anticancer drugs is a cutting-edge approach for drug del... more Nanoplatforms applied for the loading of anticancer drugs is a cutting-edge approach for drug delivery to tumors and reduction of toxic effects on healthy cells. In this study, we describe the synthesis and compare the sorption properties of four types of potential doxorubicin-carriers, in which iron oxide nanoparticles (IONs) are functionalized with cationic (polyethylenimine, PEI), anionic (polystyrenesulfonate, PSS), and nonionic (dextran) polymers, as well as with porous carbon. The IONs are thoroughly characterized by X-ray diffraction, IR spectroscopy, high resolution TEM (HRTEM), SEM, magnetic susceptibility, and the zeta-potential measurements in the pH range of 3–10. The degree of doxorubicin loading at pH 7.4, as well as the degree of desorption at pH 5.0, distinctive to cancerous tumor environment, are measured. Particles modified with PEI were shown to exhibit the highest loading capacity, while the greatest release at pH 5 (up to 30%) occurs from the surface of magnetit...
SN Applied Sciences
Creation of and the following research on systems featuring elastomer filled with a magnetic disp... more Creation of and the following research on systems featuring elastomer filled with a magnetic disperse material with good electroconductive properties have been a continuation of the development of magnetorheological fluids with the goal of finding compositions exhibiting a stronger magnetorheological effect. More profound investigations have revealed that composite materials of the given type also exhibit other significant features such as magnetodeformation, magnetostriction, field-induced shape memory, and piezomagnetoresistance, for which reason they are frequently classified as ‘magnetoactive elastomers’. Within the frames of this work, investigations of relationships between the electroconductive and dielectric properties of the polymer composite and external magnetic fields have been done. As has been shown by the experiments, changing the external magnetic field from zero to 330 mT causes the best samples to improve their conductive properties by six orders of magnitude. At t...
International Scientific and Practical Symposium "Materials Science and Technology" (MST2021)
New anisotropic silicone magnetically active elastomers were synthesized and studied. Significant... more New anisotropic silicone magnetically active elastomers were synthesized and studied. Significant surface deformations and magnetostrictive effects in the obtained composites under the application of small external magnetic fields were visualized by the atomic force microscopy methods. This opens up the controlled wrinkling possibility for micro-and nanostructured surfaces. The use of nuclear gamma resonance made it possible to identify the iron filler electronic configuration in these anisotropic composites.
Physical Sciences Reviews, 2020
The paper gives an overview of tunable elastic magnetic composites based on silicon rubber matrix... more The paper gives an overview of tunable elastic magnetic composites based on silicon rubber matrix highly filled with a magnetic soft and hard filler. The magnetic soft phase, which is represented by iron microparticles, allows active control of the physical properties of the composites, while the magnetically hard phase (e.g. neodymium–iron–boron alloy microparticles) is mainly responsible for passive adjustment of the composite. The control is performed by the application of an external magnetic field in situ, and passive adjustment is performed by means of pre-magnetization in order to change material remanent magnetization, i.e. the initial state. The potential and limits of active control and passive tuning of these composites in terms of their magneto-mechanical behavior are presented and discussed.
Smart Materials and Structures, 2020
In this study, we report on the experimentally observed phenomenon of ring-like structures format... more In this study, we report on the experimentally observed phenomenon of ring-like structures formation from chains of magnetic microparticles in magnetoactive elastomers based on magnetic hard powder. In order to find an explanation for the specific macroscopic magnetic properties of composites, microstructural observations on the elastic composite based on a thin layer of magnetic hard particles have been carried out. Particles embedded in such magnetic composites can move inside the matrix with some restrictions and form chain-like structures on being subjected to magnetizing and turn over as first the strength of the external magnetic field decreases and then the polarity of the field switches to opposite. The quantitative parameters of these processes depend on a number of factors including coercivity and remanence of particles, polymer matrix elasticity, and external field intensity. In zero-field, the magnetized particles can assemble into ring-like structures, thus tending to b...
Polymers, 2021
Dielectric properties of two series of magnetoactive elastomers (MAEs) based on a soft silicone m... more Dielectric properties of two series of magnetoactive elastomers (MAEs) based on a soft silicone matrix containing 35 vol% of magnetic particles were studied experimentally in a wide temperature range. In the first series, a hybrid filler representing a mixture of magnetically hard NdFeB particles of irregular shape and an average size of 50 μm and magnetically soft carbonyl iron (CI) of 4.5 μm in diameter was used for MAE fabrication. MAEs of the second series contained only NdFeB particles. The presence of magnetically hard NdFeB filler made it possible to passively control MAE dielectric response by magnetizing the samples. It was shown that although the hopping mechanism of MAEs conductivity did not change upon magnetization, a significant component of DC conductivity appeared in the magnetized MAEs presumably due to denser clustering of interacting particles resulting in decreasing interparticle distances. The transition from a non-conducting to a conducting state was more prono...
New silicone magnetoactive elastomers have been investigated. Changes in elastic properties and r... more New silicone magnetoactive elastomers have been investigated. Changes in elastic properties and resonance frequencies shifts in the investigated composite materials samples at the imposition external constant magnetic fields have been fixed by dynamic testing methods on vibration test benches. The method is developed and a calculation example necessary deformation creation in a magnetoactive material by means of electromagnetic fields influence is shown. The given technique of using the influence on the polymer elastic material by the electromagnetic field creates the possibility, by means of the given program specifications, to support the necessary decision on changing the dynamic characteristics (in accordance with the task changing factors in view). The material under development has a direct relation to robotics sensation, to creation of materials which are also called "smart materials". The studies show their possible application as intelligent sensors or sensors with magnetic field force feedback, which transmit signals to the computer's software control unit to support optimal decisions for "soft robotics" specified by the technical conditions. The material can be adapted as a touch sensor, allowing robots to feel the change in elastic properties in the object being contacted. The results show that it is possible to create structures for use in robotic devices based on electrically and magnetically controlled elastic polymer materials, providing a number of advantages over those currently in use.
Physica A: Statistical Mechanics and its Applications, 2018
The paper deals with theoretical study of hysteretic magnetostriction of soft ferrogelscomposite ... more The paper deals with theoretical study of hysteretic magnetostriction of soft ferrogelscomposite materials, consisting of the micron-sized magnetizable particles embedded into gel matrices. It is supposed that initially, before application of an external magnetic field, the particles are homogeneously and isotropically distributed in an elastic matrix. The theoretical explanation of the hysteresis phenomena is based on the conception that, under the field action, the particles rearrange into the linear chain-like aggregates. The typical length of the chains is determined by the competition between the force of magnetic attraction of the particles and the force of elastic deformation of the matrix.
Russian Journal of Electrochemistry, 2021
Aimed at creating a magnetic filling material with improved electroconducting properties for nove... more Aimed at creating a magnetic filling material with improved electroconducting properties for novel magneto-controllable composites, a method has been developed of electroplating metals onto particles of carbonyl iron powders of various shapes and sizes. The experimentally observed improvement in the effective conductivity of thus produced products can reach several orders of magnitude. This type of fillers may be used in preparation of magnetic elastomers which feature composite materials with the electric resistance strongly dependent on the external magnetic field (also known as the magnetoresistance effect). To achieve the latter one needs a high concentration of filler particles with good magnetic and electroconducting properties.
The motion of a magnetizable elastic body in an alternate magnetic field is experimentally studie... more The motion of a magnetizable elastic body in an alternate magnetic field is experimentally studied. The body of a cylindrical form (worm) is located in a cylindrical channel. By an electromagnetic system a traveling magnetic field is generated. The agreement experimental data with theoretical results is obtained.
PROCEEDINGS OF THE III INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES IN MATERIALS SCIENCE, MECHANICAL AND AUTOMATION ENGINEERING: MIP: Engineering-III – 2021, 2021
New anisotropic silicone magnetically active elastomers were synthesized and investigated by micr... more New anisotropic silicone magnetically active elastomers were synthesized and investigated by microscopy and spectroscopy. The record magnetostriction value in the obtained composites was determined by dynamic force microscopy, and their surface original wrinkled microstructure was visualized. The anisotropic elastomers surface topography changing by small external magnetic fields was found. Mössbauer spectroscopy use allowed determining the iron filler electronic configuration parameters in these composites. The obtained results were discussed and the conclusions about these materials prospects for practical applications were drawn.
Physical Sciences Reviews, 2020
Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials... more Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the mat...
Magnetic Hybrid-Materials, 2021
Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials... more Hybrid magnetic elastomers (HMEs) belong to a novel type of magnetocontrollable elastic materials capable of demonstrating extensive variations of their parameters under the influence of magnetic fields. Like all cognate materials, HMEs are based on deformable polymer filled with a mixed or modified powder. The complex of properties possessed by the composite is a reflection of interactions occurring between the polymer matrix and the particles also participating in interactions among themselves. For example, introduction of magnetically hard components into the formula results in the origination of a number of significantly different behavioral features entirely unknown to magnetorheological composites of the classic type. Optical observation of samples based on magnetically hard filler gave the opportunity to establish that initial magnetization imparts magnetic moments to initially unmagnetized grains, as a result of which chain-like structures continue to be a feature of the material even after external field removal. In addition, applying a reverse field causes them to turn into the polymer as they rearrange into new ring-like structures. Exploration of the relationship between the rheological properties and magnetic field conducted on a rheometer using vibrational mechanical analysis showed an increase of the relative elastic modulus by more than two orders of magnitude or by 3.8 MPa, whereas the loss factor exhibited steady growth with the field up to a value of 0.7 being significantly higher than that demonstrated by elastomers with no magnetically hard particles. At the same time, measuring the electroconductivity of elastomers filled with a nickel-electroplated carbonyl iron powder made it possible to observe that such composites demonstrated an increase of variation of the resistivity of the composite influenced by magnetic field in comparison to elastomers containing untreated iron particles. The studies conducted indicate that this material exhibits both magnetorheological and
V International Scientific and Technical Conference «Mechanical Science and Technology Update», 2021
На виброиспытательном комплексе изучены динамические свойства магнитоактивных эластомеров на осно... more На виброиспытательном комплексе изучены динамические свойства магнитоактивных эластомеров на основе силиконовой полимерной матрицы с различными ферромагнитными наполнителями в условиях воздействия внешних магнитных полей. По результатам полученных при виброиспытаниях опытных данных построены амплитудно-частотные характеристики и установлены закономерности изменения резонансных частот исследованных композитов при таких воздействиях. Приведены расчётные зависимости для определения демпфирующих свойств испытуемых образцов. Анализ полученных данных установил уменьшение коэффициентов демпфирования в исследуемых материалах по мере увеличения магнитных сил, воздействующих на исследованные композиты магнитоактивных эластомеров.
IOP Conference Series: Materials Science and Engineering, 2020
The paper describes experimental research into the dynamic properties of magnetoactive elastic po... more The paper describes experimental research into the dynamic properties of magnetoactive elastic polymers. Tests on a vibrostendshow that in certain ranges the test material is able to change the frequency of resonance vibrations under the influence of magnetic fields. Experimental data obtained during testing a sample of magnetorheological elastomer under the load produced by an unbalanced rotor of an electric motor are presented. The results of impact load action are shown.
MATEC Web of Conferences, 2020
Experimental studies of the magnetorheological elastomer dynamic properties under the influence o... more Experimental studies of the magnetorheological elastomer dynamic properties under the influence of vibrations and magnetic fields have been carried out. Amplitude-frequency characteristics of these composites were studied. The computational modeling was made and a device for creation and control of magnetoactive composite movements was developed. The interrelation of the obtained characteristics with the materials microstructure features was deduced.