We calculate the effective properties of a magnetostrictive composite in the dilute limit. The composite consists of well separated identical ellipsoidal particles of magnetostrictive material, surrounded by an elastic matrix. The free energy of the magnetostrictive particles is computed using the constrained theory of DeSimone and James [2002. A constrained theory of magnetoelasticity with app...

Acoustic wave devices have gained enormous interest for sensor applications. In the current practice, the surface acoustic waves are usually generated and measured by piezoelectric transducers. In this work, however, we propose to generate the acoustic waves by using a magnetostrictive transducer using magneticstrictive nickel strip gratings and a sensing coil. The coil encircling the gratings ...

A method is developed which allows to determine the first-order and the second-order magnetoelastic coefficients of a magnetic bulk material from the ab-initio calculation of the magnetocrystalline anisotropy energy as function of a prestrain ǫ0. Explicit results are given for bcc Fe, and they agree well with experimental data obtained from the magnetostrictive stress measurements for epitaxial...

This paper addresses the modeling of strains and forces generated by magnetostrictive transducers in response to applied magnetic elds. The magnetostrictive eeect is modeled by considering both the rotation of magnetic moments in response to the eld and the elastic vibrations in the transducer. The former is modeled with the Jiles-Atherton model of ferromagnetic hysteresis in combination with a...

A novel idea of using giant magnetostrictive material (GMM) based actuators for journal bearing control is presented in this paper. Frequency response tests on GMM actuators and a journal bearing system were examined. The performances of the system running at various journal shaft rotational speeds under control were investigated. With the aid of GMM actuators, the performances on journal shaft...