Performance Analysis of Magnetostrictive Cantilever Beam with Modeling

A magnetostrictive cantilever beam model is established by combining an energy-based constitutive magnetostrictive model with the classical Euler-Bernoulli beam theory constitutive relations that describe the material behavior are based on energy minimization techniques. We use the saturation magnetization, the magnetostrictive constant and the 4th and 6th order anisotropy constants to calculate the Zeeman, stress-induced anisotropy and magnetocrystalline anisotropy energies per unit volume. The stress of the magnetostrictive cantilever beam is solved by classical beam theory. Experiments and simulations are conducted to study performance of the cantilever. The results demonstrated the sensing is primarily due to the dominating effect of compression over tension. A critical bias magnetic field is required below which the magnetostrictive sensing cannot be observed under bending