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Computationally efficient locally linearized constitutive model for magnetostrictive materials
- Source :
- Journal of Applied Physics. 125:215108
- Publication Year :
- 2019
- Publisher :
- AIP Publishing, 2019.
-
Abstract
- This paper presents a computationally efficient constitutive model for magnetostrictive materials. High computational efficiency is achieved through the use of local linearization (about easy axes) and discrete energy-averaging techniques. The model is applied to iron-gallium alloys (Galfenol) and tested for different magnetic field orientations relative to the easy axes. It is observed that the model accurately predicts both sensing and actuation characteristics while reducing the computation time by a large factor ( >1000 times) when compared to the nonlinear energy minimization models. Furthermore, the average error observed in λ– H and B– H curves is less than 3.5% with the error increasing at magnetic field orientations farther from easy axes, particularly at large magnetic field values. Finally, the model is integrated with a finite element framework to predict the response of a Galfenol rod transducer system, and parametric studies are performed for different current and prestress conditions to optimize the device performance.
- Subjects :
- 010302 applied physics
Physics
Mathematical analysis
Constitutive equation
General Physics and Astronomy
Magnetostriction
02 engineering and technology
021001 nanoscience & nanotechnology
Energy minimization
01 natural sciences
Finite element method
Nonlinear system
Linearization
0103 physical sciences
0210 nano-technology
Parametric statistics
Galfenol
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........5301fca028e2f885d2de34aa0db7082e