PHENOMENOLOGICAL MODELING OF THE THERMO-MAGNETO-MECHANICAL BEHAVIOR OF MAGNETIC SHAPE MEMORY ALLOYS

2016 ◽  
Author(s):  
Vandré F. De Souza ◽  
Marcelo A. Savi ◽  
Alberto Paiva ◽  
Luciana L. Silva
Keyword(s):  
Shape Memory Alloys ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys ◽  
Phenomenological Modeling

scholarly journals Phenomenological modeling of the thermo-magneto-mechanical behavior of magnetic shape memory alloys

2018 ◽  
Vol 29 (19) ◽  
pp. 3696-3709
Author(s):  
Vandré F de Souza ◽  
Marcelo A Savi ◽  
Luciana L Silva Monteiro ◽  
Alberto Paiva
Keyword(s):  
Shape Memory Alloys ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Zeeman Effect ◽  
Numerical Procedure ◽  
Magnetic Behavior ◽  
Internal Variables ◽  
Magnetic Shape Memory ◽  
Energy Potential ◽  
Magnetic Shape Memory Alloys

Magnetic shape memory alloy is an interesting class of material that offers fast and contactless actuation associated with large deformation. This article deals with a novel constitutive model based on internal variables that describes the phenomenological behavior of magnetic shape memory alloys. Model formulation is developed within the framework of continuum mechanics and thermodynamics defining a mixture free energy potential based on four macroscopic phases. Zeeman effect is considered to incorporate the magnetic behavior. A numerical procedure is proposed to deal with the model nonlinearities. Model predictions are presented for different thermo-magneto-mechanical loadings treating reorientation and phase transformations. Numerical simulations are carried out showing the model capabilities and comparisons with experimental data available in the literature attesting its ability to capture the general thermo-magneto-mechanical behavior of magnetic shape memory alloys.

The Challenges of Modeling Magnetic Shape Memory Alloys Under Complex Load Paths

2010 ◽  
Author(s):  
Alex B. Waldauer ◽  
Heidi P. Feigenbaum ◽  
Constantin Ciocanel
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloys ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Compressive Stress ◽  
Test Specimen ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys ◽  
Complex Load ◽  
Load Paths

Kiefer and Lagoudas proposed a thermodynamic model for predicting the magneto-mechanical behavior of magnetic shape memory alloys (MSMAs) and then confirmed their model experimentally [1]. The model was calibrated by placing the test specimen under a constant magnetic field and a varying compressive stress. Later, Feigenbaum and Ciocanel [2] used the model to predict behavior under a constant compressive stress and a varying magnetic field. Because the two experiments were done by different researchers on different specimens, the calibration gave different values for material paremeters. In this work, through experimental results from tests performed on the same specimen by the same researchers, the Kiefer and Lagoudas model, with any hardening function, will be shown to be unable to be calibrated so as to accurately predict the magneto-mechanical behavior of a specimen under both types of loading conditions.

Improvements to the Kiefer and Lagoudas Model for Prediction of the Magneto-Mechanical Behavior of Magnetic Shape Memory Alloys

2011 ◽  
Author(s):  
Alex Waldauer ◽  
Heidi P. Feigenbaum ◽  
Nickolaus M. Bruno ◽  
Constantin Ciocanel
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloys ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Inelastic Strain ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys ◽  
Demagnetizing Field ◽  
Thermodynamic Basis ◽  
Martensitic Variants

Magnetic shape memory alloys (MSMAs) are a class of materials that exhibit large, recoverable inelastic strain. After cooling from austenite to martensite, MSMAs have a tetragonal crystalline structure with three possible orientations called variants. These variants can rotate as a result of applied stress or applied magnetic field and the resulting inelastic strain can be as high as 10% [1]. To effectively use MSMAs in any potential application, a model that can accurately predict the magneto-mechanical behavior of the MSMA is required. Kiefer and Lagoudas developed a thermodynamic basis for modeling MSMAs and then apply it in the case where two of the three martensitic variants exist [2]. The improvements to the Kiefer and Lagoudas model proposed in this paper include a different analysis of the demagnetizing effect and an inclusion of the resulting axial demagnetizing field.

Temperature dependence of martensite structure and its effect on magnetic-field-induced strain in Ni2MnGa magnetic shape memory alloys

2003 ◽  
Vol 112 ◽  
pp. 963-967 ◽  
Author(s):  
N. Glavatska ◽  
G. Mogilniy ◽  
I. Glavatsky ◽  
S. Danilkin ◽  
D. Hohlwein ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Temperature Dependence ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys ◽  
Martensite Structure

The effect of heat treatments on Ni43Mn42Co4Sn11 meta-magnetic shape memory alloys for magnetic refrigeration

2014 ◽  
Vol 74 ◽  
pp. 66-84 ◽  
Author(s):  
Nickolaus M. Bruno ◽  
Cengiz Yegin ◽  
Ibrahim Karaman ◽  
Jing-Han Chen ◽  
Joseph H. Ross ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Magnetic Refrigeration ◽  
Heat Treatments ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys

Tribological Studies of NiMnIn and NiMnSn Magnetic Shape Memory Alloys

2021 ◽  
Author(s):  
Merivan Şaşmaz ◽  
Vahdettin Koç ◽  
Serkan Güldal
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys
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