CUED Publications database

Enhancement of magnetostriction in internally-biased Terfenol-D 2-2 composites

Garcia-Gancedo, L and Busbridge, SC and Button, TW (2008) Enhancement of magnetostriction in internally-biased Terfenol-D 2-2 composites. IEEE Transactions on Magnetics, 44. pp. 3028-3031. ISSN 0018-9464

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A key issue in the fabrication of Terfenol-D 2-2 composites with internal magnetic field biasing is the selection of appropriate constituent materials to obtain high magnetostriction while keeping optimum magnetomechanical properties. The fabrication process is costly and time consuming and, therefore, numerical methods to predict their properties are useful. In this paper, finite element analysis (FEA) of the magnetostriction of such composites has been carried out using the commercial package ABAQUS. It has been shown that composites fabricated using Nd 2 Fe 14 B for the permanent magnetic material layers possess the highest internal fields within the Terfenol-D layers, although the overall strain of these composites is limited to approximately 800 × 10 -6 due to the high elastic modulus of Nd 2 Fe 14 B. Simulations showed that the strain can be enhanced by choosing a different material with a lower elastic modulus for the permanent magnetic layer even though the internal field is lower. The simulations showed that the strain can increase by 12% if the Nd 2 Fe 14 B layer is substituted by SmCo 5 ; by 23% if it is substituted by Sm 2 Co 17 ; and by 35% if it is substituted by Alnico. © 2008 IEEE.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:44
Last Modified: 04 Jan 2018 02:23