Nonlinear Magnetomechanical Modeling and Characterization of Galfenol and System-Level Modeling of Galfenol-Based Transducers

TL;DRAbstract

Magnetostrictive materials have the ability to transfer energy between the magnetic and mechanical domains.They deform in response to magnetic fields and magnetize in response to stresses.Further, their stiffness and permeability depend on both magnetic field and stress.Galfenol, an alloy of iron and gallium, is an emerging magnetostrictive material which is unique for its combination of high magnetomechanical coupling and steel-like structural properties.Although its energy density and coupling factor is less than that of other materials like Terfenol-D and piezoelectric materials, this is compensated by its ease of packaging and manufacturability.In terms of reliability, it is far superior and makes possible a new class of devices with innovative geometries capable of combined sensing and actuation in 3-D.Unique among smart materials, Galfenol can serve both as a structural element and as an actuator or sensor.Motivated by the need to utilize the full-scale, i.e., nonlinear, range of

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