Design of a magnetostrictive (MS) actuator

Several advanced technologies are introduced in automotive applications. Higher energy density and dynamic performance are demanding new and cost-effective actuator structures. Magnetostriction (MS), change in shape of materials under the influence of an external magnetic field, is one of the advanc...

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Bibliographic Details
Published inSensors and actuators. A. Physical. Vol. 144; no. 1; pp. 161 - 175
Main Authors Grunwald, A., Olabi, A.G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 28.05.2008
Subjects
Actuator
FEM
Magnetostriction
Terfenol- D
Terfenol- D
Magnetostriction
Actuator
FEM
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Summary:Several advanced technologies are introduced in automotive applications. Higher energy density and dynamic performance are demanding new and cost-effective actuator structures. Magnetostriction (MS), change in shape of materials under the influence of an external magnetic field, is one of the advanced technologies. Good understanding of specific design constrains is required to define and optimize a magnetostrictive actuator. This paper presents parametrical analysis with magnetic simulation of a magnetostrictive actuator. Proposed actuator has been designed, and the performance has been evaluated on experimental rig. Strain, elongation of the shaft, of 1000 ppm at 10 A and a blocked force over 4500 N has been achieved with shaft of 8 mm diameter, made of Terfenol- D. Furthermore, the effect of pre-stress of the Terfenol- D shaft has been evaluated experimentally. The study shows that excellent features can be obtained by magnetostrictive materials for many advanced applications.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2007.12.034