Abstract

This work addresses the Magnetostrictive effect in ferromagnetic components. Due to extensive use of ferromagnetic materials in practical engineering such as transducers, nuclear reactors, aerospace components and electric motor where magnetic field is dominant, this strain cannot be neglected. This work signifies the modelling and simulation of the three dimensional rectangular bar, fixed at one end and subjected to external magnetic field. The stress and strain developed due to magnetostrictive effect are simulated and dependency of the mathematical model has been observed on different parameters like magnetic field and current density with respect to strain. The magnetostrictve material surrounded by drive coil modelled as homogenized current carrying domain. The flux leakage is minimized by modelling a steel housing to create closed magnetic flux path. The problem is modeled and simulated in combined study of Magnetic Field and Static Structure in COMSOL Multiphysics 5.2. Result obtained involves significant strain in the core which can’t be ignored in the engineering applications and can affect various design parameters if ignored. The strain caused due to magnetostrictive effect has been verified by existing empirical strain model.