Robust solution procedure for the discrete energy-averaged model on the calculation of 3D hysteretic magnetization and magnetostriction of iron-gallium alloys

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:384

Article

Tari, H.¹  Scheidler, J. J.¹  Dapino, M. J.¹ 

[1] Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43210 USA

关键词: Iron Gallium alloys;    Galfenol;    Constitutive modeling;    Discrete energy-averaged model;    Magnetostricuon;    Hysteresis;   

DOI  :  10.1016/j.jmmm.2015.02.035

来源: Elsevier

【 摘 要 】

A reformulation of the Discrete Energy-Averaged model for the calculation of 3D hysteretic magnetization and magnetostriction of iron-gallium (Galfenol) alloys is presented in this paper. An analytical solution procedure based on an eigenvalue decomposition is developed. This procedure avoids the singularities present in the existing approximate solution by offering multiple local minimum energy directions for each easy crystallographic direction. This improved robustness is crucial for use in finite element codes. Analytical simplifications of the 3D model to 2D and 1D applications are also presented. In particular, the ID model requires calculation for only one easy direction, while all six easy directions must be considered for general applications. Compared to the approximate solution procedure, it is shown that the resulting robustness comes at no expense for ID applications, but requires almost twice the computational effort for 3D applications. To find model parameters, we employ the average of the hysteretic data, rather than anhysteretic curves, which would require additional measurements. An efficient optimization routine is developed that retains the dimensionality of the prior art. The routine decouples the parameters into exclusive sets, some of which are found directly through a fast preprocessing step to improve accuracy and computational efficiency. The effectiveness of the model is verified by comparison with existing measurement data (C) 2015 Elsevier B.V. All rights reserved

【 授权许可】

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