Experimental characterization of Ni-Ti shape memory alloy wires under complex loading conditions

1999 ◽  
Author(s):  
Harsha Prahlad ◽  
Inderjit Chopra
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Complex Loading ◽  
Loading Conditions ◽  
Experimental Characterization

Experimental Characterization of a Shape Memory Alloy-Based Morphing Radiator

2016 ◽  
Author(s):  
Christopher L. Bertagne ◽  
Jorge Chong ◽  
Darren J. Hartl ◽  
John D. Whitcomb ◽  
Lisa R. Erickson ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Characterization

Modelling and Validation of a Rotary Motor Combining Shape Memory Wires and Overrunning Clutches

2014 ◽  
Author(s):  
Giovanni Scirè Mammano ◽  
Eugenio Dragoni
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Electrical Activation ◽  
Constant Force ◽  
Experimental Characterization ◽  
Low Friction ◽  
The Wire ◽  
Rotary Motor ◽  
Static Simulation

The paper presents the conceptual design, modeling and prototyping of a novel rotary motor based on shape memory alloy (SMA) wires. The basic architecture of the device capitalizes on a SMA wire wound around a low-friction cylindrical drum. The backup force to the SMA wire is provided by a beam spring which generates a nearly-constant force tangential to the drum. The electrical activation of the wire produces a contraction of the wire, hence a rotation of the drum fitted to the shaft through an overrunning clutch (free wheel). Thanks to the overrunning clutch, during the backup phase (recoiling of the wire), the drum rotates backward while the shaft does not move. Spurious backward movements of the shaft are contrasted by a second overrunning clutch linking the shaft to the frame. The paper presents a model for the quasi-static simulation of the motor and the experimental characterization of a prototype device featuring three active drums, a rotary sensor and an angular brake to apply the external load.

EXPERIMENTAL CHARACTERIZATION OF LINEAR SHAPE MEMORY ALLOY ACTUATORS

2019 ◽  
Author(s):  
Adriel Morgado de Moraes ◽  
Luciana Loureiro da Silva Monteiro ◽  
Ricardo Alexandre Amar de Aguiar
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Characterization ◽  
Linear Shape
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