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Research Papers: Design and Analysis

Magnetostrictive Microactuations and Modal Sensitivities of Thin Magnetoelastic Shells

[+] Author and Article Information
W. K. Chai

Department of Mechanical Engineering, StrucTronics Laboratory,  University of Kentucky, Lexington, KY 40506-0503

H. S. Tzou

Department of Mechanical Engineering, StrucTronics Laboratory,  University of Kentucky, Lexington, KY 40506-0503hstzou@engr.uky.edu

S. M. Arnold, H.-J. Lee

 NASA Glenn Research Center, Cleveland, OH 44135

J. Pressure Vessel Technol 130(1), 011206 (Jan 17, 2008) (5 pages) doi:10.1115/1.2826451 History: Received January 20, 2005; Revised November 22, 2006; Published January 17, 2008

This study is to evaluate distributed microscopic actuation characteristics and control actions of segmented magnetostrictive actuator patches laminated on a flexible cylindrical shell panel. A mathematical model and its modal domain governing equations of the cylindrical shell panel laminated with distributed magnetostrictive actuator patches are presented first, followed by the formulation of distributed magnetostrictive control forces and microcontrol actions including circumferential membrane∕bending and longitudinal bending control components. Transverse mode shape functions with simply supported boundary conditions are used in the modal control force expressions and the microcontrol action analyses. Control effectives and spatial characteristics of distributed actuators depend on applied magnetic fields and on geometrical (e.g., spatial segmentation, location, and shape) and material (i.e., various actuator materials) properties. Spatially distributed magnetoelectromechanical actuation characteristics contributed by circumferential membrane∕bending and longitudinal bending control actions are investigated. Distributed control forces and microactuations of a magnetostrictive actuator patch at various locations are analyzed, and modal-dependent spatial control effectiveness is evaluated.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 3

Microcontrol actions of the (1,1) cylindrical shell mode. Top-left: (Fmn)ψ,mem; top-right: (Fmn)ψ,bend; bottom-left: (Fmn)x,bend; bottom-right: (Fmn)total.

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Figure 4

Microcontrol actions of the (1,2) cylindrical shell mode

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Figure 5

Microcontrol actions of the (1,3) cylindrical shell mode

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Figure 6

Microcontrol actions of the (2,1) cylindrical shell mode Top-left: (Fmn)ψ,mem; top-right: (Fmn)ψ,bend; bottom-left: (Fmn)x,bend; bottom-right: (Fmn)total.

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Figure 7

Microcontrol actions of the (2,2) cylindrical shell mode

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Figure 8

Microcontrol actions of the (2,3) cylindrical shell mode

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Figure 2

A cylindrical shell panel with a distributed actuator. (a) A half-revolution shell panel; (b) actuation location of actuator patches.

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Figure 1

A full cylindrical shell and a shell panel

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