The design of shape memory alloy (SMA) actuators typically compromises between force and stroke, the two properties being hard to achieve simultaneously. This paper presents a bow-like compliant SMA actuator aimed at improving the performance on both sides. Conceptually, the actuator is formed by two straight elastic beams hinged at the ends with an SMA wire pre-stretched in between. Heating of the alloy shortens the wire, which in turn makes the beams to buckle outward in a symmetric double-arched configuration. The transverse displacement of the beams amplifies the contraction of the wire while producing a favourable output force. The paper develops a simple, though accurate, analytical model of the actuator upon which a step-by-step design procedure is built. The numerical results for a case study are compared with the outcome of a finite element simulation. Copyright © 2013 by ASME.
Modeling, simulation and characterization of a linear shape memory actuator with compliant bow-like architecture / Mammano, Giovanni.; Dragoni, E.. - 1:(2013). (Intervento presentato al convegno ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2013 tenutosi a Snowbird, UT, usa nel 2013) [10.1115/SMASIS2013-3013].
Modeling, simulation and characterization of a linear shape memory actuator with compliant bow-like architecture
Mammano, giovanni.;Dragoni E.
2013
Abstract
The design of shape memory alloy (SMA) actuators typically compromises between force and stroke, the two properties being hard to achieve simultaneously. This paper presents a bow-like compliant SMA actuator aimed at improving the performance on both sides. Conceptually, the actuator is formed by two straight elastic beams hinged at the ends with an SMA wire pre-stretched in between. Heating of the alloy shortens the wire, which in turn makes the beams to buckle outward in a symmetric double-arched configuration. The transverse displacement of the beams amplifies the contraction of the wire while producing a favourable output force. The paper develops a simple, though accurate, analytical model of the actuator upon which a step-by-step design procedure is built. The numerical results for a case study are compared with the outcome of a finite element simulation. Copyright © 2013 by ASME.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
