Measurement and modeling of magnetomechanical coupling in magnetostrictive iron-gallium alloys

Phillip G. Evans; Marcelo J. Dapino

doi:10.1117/12.815826

31 March 2009 Measurement and modeling of magnetomechanical coupling in magnetostrictive iron-gallium alloys

Phillip G. Evans, Marcelo J. Dapino

Proceedings Volume 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009; 72891X (2009) https://doi.org/10.1117/12.815826
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

Measurements are performed to characterize the nonlinear and hysteretic magnetomechanical coupling of iron-gallium (Galfenol) alloys. Magnetization of production and research grade Galfenol is measured under applied stress at constant field, applied field at constant stress, and alternately applied field and stress. A high degree of reversibility in the magnetomechanical coupling is observed by comparing a series of applied field at constant stress experiments with a single applied stress at constant field experiment. Accommodation is not evident and magnetic hysteresis for both applied field and stress is shown to be coupled. A stress, field, and orientation dependent hysteron is developed from continuum thermodynamics which employs a unified hysteresis mechanism for both applied stress and field. The hysteron has an instantaneous loss mechanism similar to Coulomb-friction or Preisach-type models and is shown to satisfy the second law of thermodynamics. Stochastic homogenization is employed to account for the smoothing effect that material inhomogeneities have on the magnetization.

Citation Download Citation

Phillip G. Evans and Marcelo J. Dapino "Measurement and modeling of magnetomechanical coupling in magnetostrictive iron-gallium alloys", Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 72891X (31 March 2009); https://doi.org/10.1117/12.815826

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available