Magnetoelastics and Their Properties

Nikitin, L. V.; Samus, A. N.

doi:10.1142/s021797920503030x

Cited by 10 publications

(6 citation statements)

References 2 publications

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“…The dynamic behavior of polymer systems has been generalized [32] to include terms relevant to these composites, and neutron-spin-echo spectrometry has been used to study magnetic particle behavior within the polymer matrix [33]. The synthesis and performance of anisotropic gels [27,34,35], the effects of matrix material, magnetic filler concentration, and magnetic field strength [2,6] on composite performance have been previously documented. The mode and mechanism of deformation [2] as well as the saturation [36] and hysteretictype deformation ratio [37] behavior have been studied.…”

Section: Introductionmentioning

confidence: 99%

Design parameters for magneto-elastic soft actuators

Snyder

Nguyen

Ramanujan

2010

Smart Mater. Struct.

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Novel soft actuators can be designed from ferrogels by combining the elastic behavior of a polymer matrix with the magnetic properties of a magnetic filler. A thorough understanding of the mechanical behavior of ferrogel actuation is essential for optimizing actuator performance. For actuation by linear magnetostriction, the influence of geometrical parameters on the onset and magnitude of hysteretic loss, the range for the continuous deformation ratio, the rate of change of the deformation ratio with respect to the field strength, and the saturation elongation were modeled. These results demonstrate that geometrical design parameters such as specimen length, aspect ratio, and distance from the magnetic field source can be used to tune the performance of ferrogels.

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Section: Introductionmentioning

confidence: 99%

Design parameters for magneto-elastic soft actuators

Snyder

Nguyen

Ramanujan

2010

Smart Mater. Struct.

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“…Several MR elastomers have been fabricated by dispersing iron particles in viscous liquids, degassing the mixture and making it cured in a mold [3][4][5][6][7][8][9][10][11][12][13][14]. The experimental study has been performed on the static properties and dynamic behaviors of MR elastomers and their dependence on ingredient volume fraction, external magnetic field strength, vibration frequency and motion magnitude [4,7,8,[15][16][17][18]. MR elastomers were mostly considered to work in shear deformation, and were generally regarded as linearly viscoelastic materials so that the dynamic behavior of MR elastomers can be described by using the complex modulus dependent on vibration frequency and controllable by external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Micro-vibration response of a stochastically excited sandwich beam with a magnetorheological elastomer core and mass

Ying

2009

Smart Mater. Struct.

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Magnetorheological (MR) elastomers are used to construct a smart sandwich beam for micro-vibration control. The micro-vibration response of a clamped–free sandwich beam with an MR elastomer core and a supplemental mass under stochastic support micro-motion excitation is studied. The dynamic behavior of MR elastomer as a smart viscoelastic material is described by a complex modulus which is controllable by external magnetic field. The sixth-order partial differential equation of motion of the sandwich beam is derived from the dynamic equilibrium, constitutive and geometric relations. A frequency-domain solution method for the stochastic micro-vibration response of the sandwich beam is developed by using the frequency-response function, power spectral density function and spatial eigensolution. The root-mean-square velocity response in terms of the one-third octave frequency band is calculated, and then the response reduction capacity through optimizing the complex modulus of the core is analyzed. Numerical results illustrate the influences of the MR elastomer core parameters on the root-mean-square velocity response and the high response reduction capacity of the sandwich beam. The developed analysis method is applicable to sandwich beams with arbitrary cores described by complex shear moduli under arbitrary stochastic excitations described by power spectral density functions.

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“…This combination can produce several kinds of movements, including flexion and extension, abduction and adduction, rotation etc. A comparison of force and strain capabilities for Magpol and other artificial muscle materials is shown in Figure 11, 78, 89, 90, 98, 105, 106. It is found that Magpol has actuation properties closest to those of natural muscles.…”

Section: An Example Of Magpol Actuators: Artificial Muscle Materialsmentioning

confidence: 95%

“… Stress and strain characteristics of practical artificial muscle materials 11, 78, 89, 90, 98, 105, 106…”

Section: An Example Of Magpol Actuators: Artificial Muscle Materialsmentioning

confidence: 99%

Morphing Soft Magnetic Composites

2012

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Magnet filler-polymer matrix composites (Magpol) are an emerging class of morphing materials. Applications of Magpol can include artificial muscles, drug delivery, adaptive optics and self healing structures. Advantages of Magpol include remote contactless actuation, several actuation modes, high actuation strain and strain rate, self-sensing and quick response. The actuation modes of Magpol, its dynamic properties, work output and transduction characteristics are described. Analogies between Magpol actuation and phase transformations are presented. As an illustration of Magpol actuation, a proof of concept artificial muscle is presented. Current applications and future prospects are described.

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Magnetoelastics and Their Properties

Cited by 10 publications

References 2 publications

Design parameters for magneto-elastic soft actuators

Design parameters for magneto-elastic soft actuators

Micro-vibration response of a stochastically excited sandwich beam with a magnetorheological elastomer core and mass

Morphing Soft Magnetic Composites

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