Magnetization- and strain-dependent free energy model for FEM simulation of magnetic shape memory alloys
Autor: | Stefan Seelecke, Phillip Morrison, B. Krevet, Manfred Kohl |
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Rok vydání: | 2008 |
Předmět: |
Materials science
Condensed matter physics Magnetic moment Magnetic domain General Physics and Astronomy Magnetic field Stress (mechanics) Condensed Matter::Materials Science Magnetization Magnetic anisotropy Magnetic shape-memory alloy General Materials Science Physical and Theoretical Chemistry Actuator |
Zdroj: | The European Physical Journal Special Topics. 158:205-211 |
ISSN: | 1951-6401 1951-6355 |
Popis: | 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. |
Databáze: | OpenAIRE |
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