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Modeling of Single Crystal Magnetostriction Based on Numerical Energy Relaxation Techniques
Author(s) -
Buckmann Karsten,
Kiefer Björn,
Bartel Thorsten,
Menzel Andreas
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410187
Subject(s) - magnetostriction , anisotropy , work (physics) , materials science , nonlinear system , relaxation (psychology) , martensite , rotation (mathematics) , magnetic field , domain wall (magnetism) , magnetization , energy minimization , microstructure , magnetic anisotropy , condensed matter physics , mechanics , physics , geometry , thermodynamics , metallurgy , mathematics , optics , psychology , social psychology , quantum mechanics
In this work, an incremental energy minimization technique is proposed to simulate the magnetomechanically‐coupled, nonlinear, anisotropic and hysteretic response of single crystalline magnetic shape memory alloys (MSMA). The model captures the three key physical mechanisms that cause this characteristic behavior, namely the field‐ or stress‐induced martensite variant reorientation (twin boundary motion), magnetic domain wall motion, and local magnetization rotation, through an (incremental) energy minimizing evolution of internal state variables. Representative numerical response predictions are presented, compared to experimental observations, and discussed with respect to the associated microstructure evolution. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)