FULLY-COUPLED MODEL FOR 3-D INDUCTION AND STRAIN OF GALFENOL WITH GEOMETRY EFFECTS AND APPLIED CURRENTS

摘要

A fully-coupled and 3-D model for induction and strain of cubic magnetostrictive materials is presented which incorporates geometry dependent demagnetizing fields, current induced fields, and stress dependent permeability. Maxwell's equations are coupled with a nonlinear constitutive model derived through thermodynamics. Discretization of the nonlinear problem with a known reference configuration yields a piecewise linear model ideal for transducer design.