Simulation Of Electromagnetically Actuated
Structures With Embedded Magnetostrictive
Layers
Author(s)
S. Lentzen & R. Schmidt
Abstract
A geometrically non-linear composite shell element with integrated magnetostrictive
layers is presented. Three translational and two rotational nodal degrees of
freedom are used for the first-order transverse shear approximation. The finite
element is used in order to investigate the shape control of a cantilevered plate.
The numerical approximations to this static problem are obtained using the total
Lagrangian formulation for the moderate rotation shell theory. The significance of
a geometrically non-linear formulation in order to predict the actuator behaviour
is demonstrated.
Keywords: magnetostriction, actuators, shape control, geometrical non-linearity.
1 Introduction
The importance of introducing smart materials into structures to improve their
performance has been emphasised frequently. The most common smart materials
used in these problems are piezoelectric and magnetostrictive materials and shape
memory alloys, in decreasing number of occurrence.
Geometrically non-linear effects in piezoelectrically actuated structures have
been discussed e.g. by Lentzen and Schmidt [1]. The advantage of actuated magnetostrictive
materials is the larger range of actuation strains as compared to the
piezoelectric materials, facilitating large deformations.
Geometrically as well as physically linear finite element models can be found
in literature (see e.g. Murty et al. [2, 3], Reddy and Barbosa [4], Engdahl [5]).
Geometrically non-linear finite element models to analyse these structures are
found considerably less. In this work a geometrically non-linear finite shell ele-
Keywords
magnetostriction, actuators, shape control, geometrical non-linearity
Related Book
Other papers in this volume
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