4. Calculation elements for shape memory actuators
4.1 Force-position diagram, temperature setting
An actuator is an element that provides mechanical work by transforming another type of energy. In this case, the latter energy is thermal, and the parameter used is temperature.
Consider, for example, a shape memory alloy wire elongated to the martensitic state by tensile y 0 and subjected to a constant force F :
the mechanical work recoverable by heating (memory effect in the presence of force F ) is given by F (y 0 – y e ) (figure 15...
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Calculation elements for shape memory actuators
References
Books and magazines
Theses
- - http://www.sudoc.abes.fr
- DALLE (F.) - Étude de l'alliage à mémoire de forme Nickel-Titane-Hafnium à hautes températures de transformation : élaboration conventionnelle et non conventionnelle, mise en forme, caractérisation et évaluation....
Standardization
Association Française de Normalisation AFNOR
- Alliages à mémoire de forme. Vocabulaire et mesures. - NF A 51-080 - 4-1991
Suppliers (non-exhaustive list)
Copper-based alloys: Trefimetals: http://www.trefimetaux.com
Titanium-nickel alloys: Mémométal Technologies: http://www.memometal.com
Iron-based alloys: Ugitech: http://www.uginesavoie.fr
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