Characterization and multiscale modeling of the magneto-elastic behavior of Galfenol

The properties of giant magnetostrictive materials (GMM) in actuation, sensing or energy harvesting applications are very sensitive to pre-stress levels. This work presents the experimental characterization of the magneto-mechanical behavior of Galfenol under static compressive and tensile stress. A multiscale modeling tool is then used to model the magnetic and magnetostrictive responses. The results demonstrates the high sensitivity to stress of the magneto-mechanical behaviour of Galfenol and the ability of the proposed multiscale approach to capture these effects.