&lt;title&gt;Modeling of embedded magnetostrictive particulate actuators&lt;/title&gt;

Wu, Yuefei; Anjanappa, M.

doi:10.1117/12.239054

Cited by 5 publications

(2 citation statements)

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“…A MPA is a beam with fully and uniformly distributed magnetostrictive particles. Preliminary work on MPAs is reported by Wu and Anjanappa [9]. In this paper, we give a detailed presentation of the configuration, modeling, and characterization of MPAs.…”

Section: Introductionmentioning

confidence: 99%

Magnetostrictive particulate actuators: configuration, modeling and characterization

Anjanappa

1997

Smart Mater. Struct.

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Magnetostrictive particulate actuators (MPAs) that take advantage of easy embedability and remote excitation capability of magnetostrictive particles are proposed as new actuators for smart structure applications. A MPA is configured as a small rectangular polymeric beam with magnetostrictive particles dispersed uniformly. Based on the compatibility condition, a load line equation is developed that relates the free strain with the mechanical stress experienced by the magnetostrictive particles. The load line equation and the magnetoelastic property of the material are used to develop a macroscopic behavior model of a MPA. Characterization experiments are used to find the orientation factor and pre-stress. Experimental work shows that the static performance of MPAs for an applied magnetic field depends on the volume fraction, orientation field, mechanical preload, and the stiffness of the polymeric matrix. In general this actuator can be used where the structure needs to be excited with a large force and small strain over a wide frequency range. For example, embedded in a laminated composite, MPAs can be used as micropositioners, vibration dampers, platform stabilizers, and motors.

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Section: Introductionmentioning

confidence: 99%

Magnetostrictive particulate actuators: configuration, modeling and characterization

Anjanappa

1997

Smart Mater. Struct.

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“…For brevity, only the incremental integral equations are listed in this section. Iv {WjTAadv -po fu1T(Mv --/2ofs [WuITn(2Mn)nT&VIdS Is [WJTfds + j {W]Tzfds -J[WJTadv + iiof [W}T(M.)ildv(14) where [W,'j is a matrix of derivatives of the weight functions [W}. Also, fis the vector of applied surface tractions and Il is the unit normal vector to the surface.…”

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confidence: 98%

<title>New magnetic-field-based weighted-residual quasi-static finite element scheme for modeling bulk magnetostriction</title>

Kannan

Dasgupta

1998

SPIE Proceedings

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Deformation control of smart structures and damage detection in smart composites by magneto-mechanical tagging are just a few of the increasing number of applications of polydomain, polycrystalline magnetostrictive materials that are currently being researched. Robust computational models of bulk magnetostriction will be of great assistance to designers of smart structures for optimization of performance and development of control strategies. This paper discusses the limitations of existing tools, and reports on the work of the authors in developing a three dimensional nonlinear continuum finite element scheme for magnetostrictive structures, based on an appropriate Galerkin variational principle and incremental constitutive relations. The unique problems posed by the form of the equations governing magneto-mechanical interactions as well as their impact on the proper choice of variational and finite element discretization schemes are discussed. An adaptation of vectorial edge functions for interpolation of magnetic field in hexahedral elements is outlined. The differences between the proposed finite element scheme and available formulations are also discussed in this paper. Computational results obtained from the newly proposed scheme will be presented in a future paper.

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Magnetostrictive Devices

Dapino

Deng

Calkins

et al. 2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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Magnetostrictive materials exhibit coupling between magnetic and mechanical energies. This bidirectional energy exchange can be employed for actuation, sensing, and energy harvesting. All ferromagnetic materials exhibit the magnetostrictive effect, but only certain iron–rare earth alloys, iron–gallium alloys, amorphous metals, and iron‐ aluminum alloys exhibit sufficiently high magnetostriction for commercial use. Because the magnetostrictive effect is an intrinsic material property that is robust against external factors such as stress and cyclic fatigue, magnetostrictive devices are suitable for harsh environments. This article provides an overview ofmagnetostrictivematerials and devices, particularly focused on Metglas, Terfenol‐D, and Galfenol. Various transducer topologies are presented and discussed, along with quantification of performance metrics and experimental aspects related to understanding and harnessing the intrinsic nonlinearities of magnetostrictive materials. Selected modeling approaches considering both constitutive material behavior and system response are presented.

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<title>Modeling of embedded magnetostrictive particulate actuators</title>

Cited by 5 publications

References 3 publications

Magnetostrictive particulate actuators: configuration, modeling and characterization

Magnetostrictive particulate actuators: configuration, modeling and characterization

<title>New magnetic-field-based weighted-residual quasi-static finite element scheme for modeling bulk magnetostriction</title>

Magnetostrictive Devices

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