Superelastic behavior modeling in shape memory alloys

2003 ◽  
Vol 112 ◽  
pp. 205-208 ◽  
Author(s):  
S. Arbab Chirani ◽  
D. Aleong ◽  
C. Dumont ◽  
D. McDowell ◽  
E. Patoor
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Behavior Modeling ◽  
Superelastic Behavior

scholarly journals An SMA Passive Ankle Foot Orthosis: Design, Modeling, and Experimental Evaluation

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Liberty Deberg ◽  
Masood Taheri Andani ◽  
Milad Hosseinipour ◽  
Mohammad Elahinia
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Motion Analysis ◽  
Experimental Evaluation ◽  
Mechanical Systems ◽  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
New Device ◽  
Superelastic Behavior ◽  
Foot Orthosis

Shape memory alloys (SMAs) provide compact and effective actuation for a variety of mechanical systems. In this work, the distinguished superelastic behavior of these materials is utilized to develop a passive ankle foot orthosis to address the drop foot disability. Design, modeling, and experimental evaluation of an SMA orthosis employed in an ankle foot orthosis (AFO) are presented in this paper. To evaluate the improvements achieved with this new device, a prototype is fabricated and motion analysis is performed on a drop foot patient. Results are presented to demonstrate the performance of the proposed orthosis.

Influence of incorporated nanoparticles on superelastic behavior of shape memory alloys

2020 ◽  
Vol 776 ◽  
pp. 139025
Author(s):  
Victor A. L'vov ◽  
Anna Kosogor ◽  
Serafima I. Palamarchuk ◽  
Gregory Gerstein ◽  
Hans J. Maier
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Superelastic Behavior

Iron-based superelastic alloys with near-constant critical stress temperature dependence

Science ◽  
2020 ◽  
Vol 369 (6505) ◽  
pp. 855-858 ◽  
Author(s):  
Ji Xia ◽  
Yuki Noguchi ◽  
Xiao Xu ◽  
Takumi Odaira ◽  
Yuta Kimura ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Temperature Dependence ◽  
Critical Stress ◽  
Outer Space ◽  
Alloy System ◽  
Large Temperature ◽  
Superelastic Behavior ◽  
Iron Based ◽  
Metal Shape

Shape memory alloys recover their original shape after deformation, making them useful for a variety of specialized applications. Superelastic behavior begins at the critical stress, which tends to increase with increasing temperature for metal shape memory alloys. Temperature dependence is a common feature that often restricts the use of metal shape memory alloys in applications. We discovered an iron-based superelastic alloy system in which the critical stress can be optimized. Our Fe-Mn-Al-Cr-Ni alloys have a controllable temperature dependence that goes from positive to negative, depending on the chromium content. This phenomenon includes a temperature-invariant stress dependence. This behavior is highly desirable for a range of outer space–based and other applications that involve large temperature fluctuations.

A Thermodynamically Based Model of the Superelastic Behavior of Shape Memory Alloys Using a Discrete Preisach Model

2009 ◽  
Author(s):  
Srikrishna Doraiswamy ◽  
Mrinal Iyer ◽  
Arun R. Srinivasa ◽  
Srinivasan M. Sivakumar
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Vibration Control ◽  
Stress And Strain ◽  
Preisach Model ◽  
Thermomechanical Response ◽  
Superelastic Behavior ◽  
Seismic Applications

Shape Memory Alloys are increasingly being used in aeronautic [1], vibration control and seismic applications [2–6]. These applications require models that faithfully represent the full thermomechanical response of SMA wires but which at the same time are simple and fast to implement. In this paper we present a model for the superelastic behavior of Shape Memory Alloys that combines a thermodynamical framework with a Preisach model. This approach allows us to easily account for both stress and strain controlled responses as well as changes in termperature in a simple and straightforward way.

scholarly journals Long-term Stability of Superelastic Behavior of Nanosubgrained Ti-Nb-Zr and Ti-Nb-Ta Shape Memory Alloys

2015 ◽  
Vol 2 ◽  
pp. S26-S31 ◽  
Author(s):  
V. Sheremetyev ◽  
S. Prokoshkin ◽  
V. Brailovski ◽  
S. Dubinskiy ◽  
M. Filonov ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Term Stability ◽  
Long Term Stability ◽  
Superelastic Behavior

scholarly journals Martensitic Transformations and Superelastic Behavior at Low Temperatures in Ti50−xNi40+xCu10 Shape Memory Alloys

2016 ◽  
Vol 57 (3) ◽  
pp. 269-277 ◽  
Author(s):  
Yuta Kimura ◽  
Xiao Xu ◽  
Kodai Niitsu ◽  
Toshihiro Omori ◽  
Ryosuke Kainuma
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Low Temperatures ◽  
Martensitic Transformations ◽  
Superelastic Behavior
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