scholarly journals Optimum Mechanical Design of Binary Actuators Based on Shape Memory Alloys

10.5772/50147 ◽  
2012 ◽  
Author(s):  
A. Spaggiari ◽  
G. Scire ◽  
E. Dragoni
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Mechanical Design ◽  
Binary Actuators

Shape Memory Alloys in Automotive Applications

2014 ◽  
Vol 663 ◽  
pp. 248-253 ◽  
Author(s):  
Jaronie Mohd Jani ◽  
Martin Leary ◽  
Aleksandar Subic
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
External Force ◽  
Active Element ◽  
Mechanical Design ◽  
Competitive Market ◽  
Automotive Applications ◽  
Market Prices ◽  
Sma Actuators

Shape memory alloy (SMA) actuators have drawn much attention and interest due to their unique and superior properties, and are expected to be equipped in many modern vehicles at competitive market prices. The key advantage is that SMA actuators do not require bulky and complicated mechanical design to function, where the active element (e.g. SMA wire or spring) can be deformed by applying minimal external force and will retain to their previous form when subjected to certain stimuli such as thermomechanical or magnetic changes. This paper describes the SMA attributes that make them ideally suited as actuators in automotive applications and to address their limitations, feasibilities and prospects.

Smartflex NiTi Wires for Shape Memory Actuators

2008 ◽  
Vol 59 ◽  
pp. 198-206 ◽  
Author(s):  
L. Fumagalli ◽  
F. Butera ◽  
Alberto Coda
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Mechanical Design ◽  
Electrical Response ◽  
Industrial Applications ◽  
Thermomechanical Properties ◽  
Shape Memory Actuators ◽  
Minimum Number ◽  
Mechanically Stabilized ◽  
Electro Magnetic

Shape Memory Alloys (SMAs) are active metallic materials classified nowadays as “smart” or “intelligent” materials. One of the main areas of interest is that of actuators. The use of Shape Memory Alloys in actuators offers the opportunity to develop robust, simple and lightweight elements that can represent an alternative to electro-magnetic actuators commonly used in several fields of industrial applications, such as automotive, appliances, etc. The obvious simplicity of mechanical design and minimum number of moved parts is amazing for an actuator. NiTi SMAs demonstrated to have the best combination of properties. Due to its relatively high recovery stress and strain, actuators providing significant force and stroke can be designed. There are perhaps thousands of applications of NiTi-based actuators mentioned in literature and in patents. Successful applications will build on SMA strengths whilst taking into account its weaknesses. SAES Getters S.p.A., thanks to its vertically integrated process and to the scientific and quality approach, developed a NiTi-based wires family which can represent a very good solution for shape memory actuators. The mechanically stabilized SAES Smartflex NiTi actuators show a very sophisticated profile of properties. In this paper the mechanical, thermal and electrical response of these shape memory wires, at diameters ranging from 25 to 500 mm, under different working conditions, simulating the actual operating condition in real actuators, will be examined in depth and discussed, in order to direct the design of the actuator so that the functional properties of the material can be completely exploited. The thermomechanical properties have been investigated and measured by several methods. The most common and useful tests for these commercially available wires will be also described.

Atomic Order and Martensitic Transformation in Cu-Al-Be Shape Memory Alloys

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-973-C8-978
Author(s):  
M. Jurado ◽  
Ll. Mañosa ◽  
A. González-Comas ◽  
C. Stassis ◽  
A. Planes
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Atomic Order

Concentration, temperature and deformation dependences of martensite lattice parameters in binary Ti-Ni shape memory alloys

2003 ◽  
Vol 112 ◽  
pp. 651-654 ◽  
Author(s):  
S. D. Prokoshkin ◽  
V. Brailovski ◽  
S. Turenne ◽  
I. Yu Khmelevskaya ◽  
A. V. Korotitskiy ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Lattice Parameters

Electron microscopy study of microtexture in Cu-Al-Ni shape memory alloys processed by powder metallurgy

2003 ◽  
Vol 112 ◽  
pp. 615-618 ◽  
Author(s):  
P. P. Rodriguez ◽  
J. San Jean ◽  
A. Iza-Mendia ◽  
V. Recarte ◽  
J. J. Pérez-Landazabal ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Powder Metallurgy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Microscopy Study ◽  
Electron Microscopy Study
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