Three-Dimensional Model of Magnetostrictive Force Sensor Considering Stress Coupling and Experimental Research

doi:10.16182/j.issn1004731x.joss.201810010

Abstract

Abstract: Considering the brittleness of normal magnetostrictive and piezoelectric materials, a new magnetostrictive force sensor is proposed, in which Galfenol alloy is taken as the sensing element. Considering the anisotropy of Galfenol, three-dimensional magneto-mechanical coupled model is presented on the basis of electromagnetic and mechanical governing equation. The nonlinear magnetization behavior of Galfenol is described by employing the discrete energy-averaged model. The coupling of the magnetization model and the structural model is implemented with the PDE weak form equations. The model is solved by using the weak form module of Comsol Multiphysics. Simulation results show that both field and stress induced magnetization can be described by using the model. A sensing prototype is designed by using a Φ8x100 mm Galfenol rod. Experimental results show that the proposed sensing structure can be used to measure alternating load. Measurements of the magnetization have a good match with the simulations.

Key words: stress coupling, magnetostrictive, force sensing, magneto-mechanical coupling

CLC Number:

TP391.9

Li Bo, Yang Jiabin, Shu Liang, Li Penghui, Wu Hong. Three-Dimensional Model of Magnetostrictive Force Sensor Considering Stress Coupling and Experimental Research[J]. Journal of System Simulation, 2018, 30(10): 3671-3680.

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