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...

A magnetostrictive FeNi-coated surface acoustic wave (SAW)-based current sensor was proposed in this work. The weak remanence and hysteresis effect of the FeNi itself contributes to suppress the asymmetry in sensor response at increasing and decreasing current. The sensor response was simulated by solving the coupled electromechanical field equation in layered structure considering the magnetos...

Recent results on the development and implementation of a novel technology for lung tumor detection and imaging is presented. This technology offers high-sensitivity imaging of magnetic nanoparticles to provide specific diagnostic images of early lung tumors and potential distant metastases. Recent developments in giant magnetostrictive (GMS) or magnetic shape memory (MSM) materials have led to...

The magnetic flux density change ΔB caused by the inverse magnetostrictive effect is key for achieving high-performance vibration power generation. As magnetization curve of polycrystalline Fe–47.6 at. % Co–2.3 V (Fe–Co–V) alloy became easier to magnetize applying tensile stresses, value estimated from curves depended significantly on fields. Hence, generation a U-shaped unimorph device using F...

Condition assessment of cables has gained considerable attention for the bridge safety. A magnetic flux leakage and magnetostrictive guided wave hybrid transducer is provided to inspect bridge cables. The similarities and differences between the two methods are investigated. The hybrid transducer for bridge cables consists of an aluminum framework, climbing modules, embedded magnetizers and a r...

Development of Apple Workgroup Cluster and Parallel Computing for Phase Field Model of Magnetic Materials. (May 2009) Yongxin Huang, B.S., University of Science and Technology of China Chair of Advisory Committee: Dr. Yongmei Jin Micromagnetic modeling numerically solves magnetization evolution equation to process magnetic domain analysis, which helps to understand the macroscopic magnetic prop...

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...

Magnetostrictive materials are routinely employed as actuator and sensor elements in a wide variety of noise and vibration control problems. In infrastructural applications, other technologies such as hydraulic actuation, piezoelectric materials and more recently, magnetorheological fluids, are being favored for actuation and sensing purposes. These technologies have reached a degree of technic...

Magnetostrictive transducers are becoming increasingly prevalent in industrial applications including high speed milling and hybrid motor design due to their broadband, large force capabilities. To achieve the level of performance required by such applications, however, these transducers must operate in nonlinear and hysteretic regimes. To accommodate this nonlinear behavior, models and control...

The lead-free ferroelectric 0.5Ba(Zr0.2Ti0.8)O3 - 0.5(Ba0.7Ca0.3)TiO3 (BCZT) is a promising component for multifunctional multiferroics due to its excellent room temperature piezoelectric properties. Having a composition close to the polymorphic phase boundary between the orthorhombic and tetragonal phases, it deserves a case study for analysis of its potential for modern electronics applicatio...