Magnetomechanical characterization and unified actuator/sensor modeling of ferromagnetic shape memory alloy Ni-Mn-Ga

Neelesh N. Sarawate; Marcelo J. Dapino

doi:10.1117/12.715924

20 April 2007 Magnetomechanical characterization and unified actuator/sensor modeling of ferromagnetic shape memory alloy Ni-Mn-Ga

Neelesh N. Sarawate, Marcelo J. Dapino

Author Affiliations +

Proceedings Volume 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007; 652629 (2007) https://doi.org/10.1117/12.715924
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

A unified thermodynamic model is presented which describes the bulk magnetomechanical behavior of singlecrystal ferromagnetic shape memory Ni-Mn-Ga. The model is based on the continuum thermodynamics approach, where the constitutive equations are obtained by restricting the thermodynamic process through the Clausius-Duhem inequality. The total thermodynamic potential consists of magnetic and mechanical energy contributions. The magnetic energy consists of Zeeman, magnetostatic, and anisotropy energy contributions. The microstructure of Ni-Mn-Ga is included in the continuum thermodynamic framework through the internal state variables domain fraction, magnetization rotation angle, and variant volume fraction. The model quantifies the following behaviors: (i) stress and magnetization dependence on strain (sensing effect), and (ii) strain and magnetization dependence on field (actuation effect).

Citation Download Citation

Neelesh N. Sarawate and Marcelo J. Dapino "Magnetomechanical characterization and unified actuator/sensor modeling of ferromagnetic shape memory alloy Ni-Mn-Ga", Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 652629 (20 April 2007); https://doi.org/10.1117/12.715924

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