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Simulation of a Ferromagnetic Shape Memory Actuator in a Magnetic Field

Published online by Cambridge University Press:  01 February 2011

B. Krevet  and
M. Kohl
B. Krevet
Affiliation:
Forschungszentrum Karlsruhe, IMT, Postfach 3640, D-76021 Karlsruhe, Germany; Phone +49 7247 822759; FAX +49 7247 824331; [email protected]
M. Kohl
Affiliation:
Forschungszentrum Karlsruhe, IMT, Postfach 3640, D-76021 Karlsruhe, Germany; Phone +49 7247 822759; FAX +49 7247 824331; [email protected]
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Abstract

In this work, we present simulations of the thermo-magneto-mechanical performance of a ferromagnetic SMA microactuator in the inhomogeneous field of a CoSm permanent magnet and compare it with experimental results. For the simulations, a combination of different finite element (FEM) programs is used allowing the coupling of electrical, thermal, magnetic and mechanical properties. The field of a permanent magnet is calculated along the trajectory of the microactuator, from which the magnetic forces Fmag and their gradients are derived. Shape memory forces FSME are calculated based on a two-phase macromodel. Both forces, Fmag and FSME, determine the quasi-static behavior of a NiMnGa microscanner, which has been proposed recently.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 881: Symposium CC – Coupled Nonlinear Phenomena Modeling and Simulation for Smart, Ferroic and Multiferroic Materials , 2005 , CC4.10
Copyright
Copyright © Materials Research Society 2005

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References

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