An initial experimental investigation into the change in magnetic induction of a Terfenol-D rod due to external stress

Magnetostriction is typically used for actuation and its reverse effect, known as the magnetomechanical effect, for sensing. Giant magnetostrictive materials, such as Terfenol-D, are capable of producing large strains when placed in a magnetic field and changes in the magnetization on application of...

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Bibliographic Details
Published in:Smart materials and structures 2003-10, Vol.12 (5), p.763-768
Main Authors: Chakraborty, S, Tomlinson, G R
Format: Article
Language:English
Subjects:
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Transducers
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Summary:Magnetostriction is typically used for actuation and its reverse effect, known as the magnetomechanical effect, for sensing. Giant magnetostrictive materials, such as Terfenol-D, are capable of producing large strains when placed in a magnetic field and changes in the magnetization on application of an applied stress. The present investigation seeks to explore the novel idea of changing the magnetization of a Terfenol-D rod due to an applied force under a defined pre-stress to investigate the suitability of transferring appreciable amounts of magnetic energy to external media. Experimental investigations have been carried out on a Terfenol-D monolithic rod under different levels of constant pre-stress to quantitatively estimate the change in magnetic induction. It is shown that the change in magnetic induction is very small compared with that for a permanent magnet. Further, the inductive field is dependent on the dynamic behaviour of the Terfenol-D rod.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/12/5/013