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Magnetization- and strain-dependent free energy model for FEM simulation of magnetic shape memory alloys

  • B. Krevet
  • M. Kohl
  • P. Morrison
  • S. Seelecke
Article

Abstract.

A free-energy function is constructed, which couples strain and magnetic moments in ferromagnetic shape memory alloys. The associated Gibbs function is used to calculate time-dependent transition probabilities between martensite variants in a magnetic field under applied stress. By keeping track of the variant fractions, the evolution of strain and magnetization is determined. The simulation model is built in a finite element program for structural analysis, in order to simulate magnetic field-dependent strain and magnetization characteristics of a test actuator. The influence of material parameters and sample geometry is discussed.

Keywords

Shape Memory Alloy European Physical Journal Special Topic Phase Fraction Easy Axis Anisotropy Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Authors and Affiliations

  • B. Krevet
    • 1
  • M. Kohl
    • 1
  • P. Morrison
    • 2
  • S. Seelecke
    • 2
  1. 1.Forschungszentrum Karlsruhe, IMT, Postfach 3640KarlsruheGermany
  2. 2.Department of Mechanical & Aerospace EngineeringNorth Carolina State UniversityRaleighUSA

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