Vol. 4, No. 5, 2009

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ISSN: 1559-3959
Nonlinear bending response of giant magnetostrictive laminated actuators in magnetic fields

Yasuhide Shindo, Fumio Narita, Kotaro Mori and Tasuku Nakamura

Vol. 4 (2009), No. 5, 941–949
Abstract

We report numerical and experimental investigations into the nonlinear bending behavior of magnetostrictive laminated actuators under magnetic fields. Magnetostrictive actuators were fabricated from thin layers of Terfenol-D and metal, and the magnetostriction of the devices was measured. A nonlinear finite element analysis was employed to evaluate the contribution of magnetic domain switching to the second-order magnetoelastic constants in the Terfenol-D layer. The effect of a magnetic field on the nonlinear deflection and internal stress of magnetostrictive laminated actuators is discussed.

Keywords
finite element method, material testing, giant magnetostrictive material, nonlinear bending
Milestones
Received: 8 April 2008
Revised: 2 December 2008
Accepted: 17 May 2009
Published: 5 September 2009
Authors
Yasuhide Shindo
Tohoku University
Department of Materials Processing
Graduate School of Engineering
Aoba-ku, Sendai 980-8579
Japan
Fumio Narita
Tohoku University
Department of Materials Processing
Graduate School of Engineering
Aoba-ku, Sendai 980-8579
Japan
Kotaro Mori
Tohoku University
Department of Materials Processing
Graduate School of Engineering
Aoba-ku, Sendai 980-8579
Japan
Tasuku Nakamura
Tohoku University
Department of Materials Processing
Graduate School of Engineering
Aoba-ku, Sendai 980-8579
Japan