Modeling of Magnetic Properties of Magnetorheological Elastomers Using JA Hysteresis Model

Journal Article · Mon Sep 21 00:00:00 EDT 2020 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/tmag.2020.3024878· OSTI ID:1765698

Kiarie, Winnie M.  ^[1]; Barron III, Edward J. ^[2]; Baghel, A. P. S.  ^[3]; Nlebedim, I. C. ^[3]; Bartlett, Michael D.  ^[4]; Jiles, David C.  ^[1]

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1. Iowa State Univ., Ames, IA (United States)
2. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
3. Ames Lab., Ames, IA (United States). Critical Materials Inst. (CMI)
4. Iowa State Univ., Ames, IA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

Magnetorheological elastomers (MREs) are composite materials that consist of magnetically permeable particles in a nonmagnetic polymeric matrix. Under the influence of an external magnetic field, a reversible deformation change occurs in the mechanical properties of these materials. Due to their coupled magnetomechanical response, these materials have been found suitable for a range of applications including tunable vibration absorbers, sensors, and actuators. Notably, improvement of such devices are prerequisites to efficient energy conversion systems, hence the need to understand further the MRE technology. The Jiles-Atherton (JA) theory takes into consideration the magneto-coupling experienced by effective domains in a magnetic material. Algorithm based on the theory yields five model parameters; saturation magnetization (M_s), domain density (a), domain coupling (α), loss coefficient (k), and reversibility (c). Using JA theory, model parameters were calculated and linked to the physical attributes of Fe powder and isotropic MRE. The results show that the calculated Ms for the MRE is reasonably related to that of the Fe powder by a factor of the particle's volume fraction used in the MRE. Further, the calculated k, a, and α provided support for the reduced pinning factor, domain density, and increased domain coupling in the MRE due to the changes in the domain structure between the two materials. From the calculated JA parameters, finite-element modeling (FEM) of the MRE hysteresis loop was performed. The analysis showed that the modeled magnetic properties including coercivity, remanence, and coordinates of the hysteresis loop tip vary with geometric position.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States). Critical Materials Institute (CMI)
• Sponsoring Organization: Link Manufacturing, Ltd.; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1765698
• Report Number(s): IS-J-10,402
• Journal Information: IEEE Transactions on Magnetics, Vol. 57, Issue 2; ISSN 0018-9464
• Publisher: Institute of Electrical and Electronics Engineers. Magnetics Group
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
Finite-element model (FEM)
Jiles–Atherton (JA) model
magnetorheological elastomers (MREs)