A magnetoelastic model of nonlinear behaviors of Tb-Dy-Fe alloys based on domain rotation

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II

Article type: Research Article

Authors: Pei, Yongmao^{a; *} | Fang, Daining^{a; b}

Affiliations: [a] College of Engineering, Peking University, Beijing 100871, China | [b] AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Correspondence: [*] Corresponding author. Tel./Fax: +86 10 82529980; E-mail: [email protected]

Abstract: A magnetoelastic constitutive theory of nonlinear anhysteretic behaviors based on domain rotation is presented in this paper for giant magnetostrictive materials (GMMs). For a Tb-Dy-Fe polycrystal with preferred orientations, the magnetic moments of domains are constrained by the anisotropy to lie along the <111> easy magnetization directions. Thus, the fractional occupancies of only the eight <111> directions and the field direction are calculated using an inverse exponential distribution function for simplicity. The linear fitting of the potential distribution parameter with the pre-stress is obtained from the magnetization curves under different compressive stresses for a [110] oriented Tb-Dy-Fe rod, which is used to predict the magnetostriction behaviors. It shows good quantitative agreement with the experimental results under a range of constant uniaxial compressive stresses.

DOI: 10.3233/JAE-2010-1198

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 883-889, 2010