Quasi-Static Finite Element Analysis of Magnetostrictive Vibration Energy Harvester

摘要

The paper aims at the behaviour analysis of the Galfenol rods under bending conditions that are employed in a vibration energy harvester by illustrating the spatial variations in stress and magnetic field. Armstrong model is employed to predict the magnetization and magnetostriction as a function of stress and magnetic field and it is incorporated into a static finite element model of vibration-driven generator by which the compressive and tensile stresses contributions to change in magnetic flux densities in the Galfenol rods were calculated and the effectiveness of the inspected vibration-driven generator in voltage generation and energy harvesting is demonstrated.