One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials

1997 ◽  
Vol 8 (4) ◽  
pp. 285-302 ◽  
Author(s):  
C. Liang ◽  
C. A. Rogers
Keyword(s):  
Shape Memory ◽  
Constitutive Relations ◽  
One Dimensional ◽  
Shape Memory Materials

Design of Shape Memory Alloy Actuators

1992 ◽  
Vol 114 (2) ◽  
pp. 223-230 ◽  
Author(s):  
C. Liang ◽  
C. A. Rogers
Keyword(s):  
Thermal Analysis ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Constitutive Relations ◽  
Design Approach ◽  
One Dimensional ◽  
Design Case ◽  
The One ◽  
Transient Thermal ◽  
Capacitance Transient

This paper describes the design of shape memory alloy force and displacement actuators based upon the thermomechanical constitutive relations previously developed by the authors. Numerical simulations and design case studies are presented which show the utility and advantages of this method over design methods currently being used. The types of actuators described and analyzed include bias spring actuators, differential force actuators, and their hybrid systems. The design approach includes coupling between the one-dimensional thermomechanical constitutive relations and a lumped capacitance transient thermal analysis. The design approach described herein will provide a practical and convenient method for use in the design of shape memory alloy actuators.

Nonlinear Bending of Composite Circular Plates with Embedded Shape Memory Alloy Fibers

2008 ◽  
Vol 33-37 ◽  
pp. 501-506
Author(s):  
Shi Rong Li ◽  
Wen Shan Yu
Keyword(s):  
Shape Memory ◽  
Circular Plate ◽  
Mechanical Load ◽  
Constitutive Relations ◽  
Thin Plates ◽  
Circular Plates ◽  
Nonlinear Bending ◽  
One Dimensional ◽  
Bending Deformation ◽  
Simply Supported

Based on Brinson’s one-dimensional thermo-mechanical constitutive relations of shape memory alloys and the theory of thin plates in the von Kármán sense, the response of bending of a uniform heated circular plate embedded with SMA fibers in the radial directions and subjected to a uniform distributed mechanical load is studied. The characteristic curves of the central deflection versus temperature rise of the circular plate with both clamped and simply supported boundary conditions are obtained. The numerical results show that, the recovery forces of the pre-strained SMA caused by the phase transformation from martensite to austenite can modify the bending deformation significantly. So, it can be concluded that the bending deformation can be adjusted effectively and actively by embedment of the SMA fibers into the circular plates

MAGNETIC SHAPE MEMORY ALLOYS: THREE-DIMENSIONAL MODELING AND ANALYSIS

2011 ◽  
Vol 21 (05) ◽  
pp. 1043-1069 ◽  
Author(s):  
A.-L. BESSOUD ◽  
U. STEFANELLI
Keyword(s):  
Shape Memory ◽  
Constitutive Relations ◽  
Three Dimensional ◽  
Magnetic Shape Memory ◽  
Magnetic Shape Memory Alloys ◽  
Modeling And Analysis ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Shape Memory Materials ◽  
Γ Convergence

We present a three-dimensional phenomenological model for the magneto-mechanical behavior of magnetic shape memory materials such as Ni2MnGa . Moving from micromagnetic considerations, we advance to some thermodynamically consistent constitutive relations describing the magnetically-induced cubic-to-tetragonal martensitic transformation in a single crystal. We present an existence analysis for both the constitutive relation problem and the three-dimensional quasi-static evolution problem. Finally, we discuss the reduction of this model to some simpler one by means of a rigorous Γ-convergence analysis.

An overview of elastic polymeric shape memory materials for comfort fitting

2017 ◽  
Vol 136 ◽  
pp. 238-248 ◽  
Author(s):  
L. Sun ◽  
W.M. Huang ◽  
T.X. Wang ◽  
H.M. Chen ◽  
C. Renata ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Materials
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