EnglishThe article presents the analytical model of a linear/rotary solid-state actuator formed by a shape memory wire wound over a cylindrical drum. The model assumes a bilinear w temperature) and a linear elastic response in the austenitic state (high temperature). Based on simple equilibrium conditions, the model calculates the stress and strain distributions in the wire when subjected to a constant external backup force and undergoing frictional sliding forces at the contact with the drum. Closed-form expressions are supplied for the stroke produced by whatever actuator geometry and are validated numerically against finite element results. For a particular actuator configuration, the analytical forecasts are also checked experimentally on a proof-of-concept prototype. The analytical model shows that large strokes (up to one-half of the drum’s diameter) are achieved if the frictional coefficient is kept below 0.01. Rolling-contact architectures or sonic-pulse excitations of the drum are discussed as technical solutions to obtain such low friction values.
| Data di pubblicazione: | 2011 |
| Titolo: | Modeling of Wire-on-Drum Shape Memory Actuators for Linear and Rotary Motion |
| Autore/i: | G. Scirè Mammano; E. Dragoni |
| Autore/i UNIMORE: | |
| Digital Object Identifier (DOI): | 10.1177/1045389X11411214 |
| Rivista: | |
| Volume: | 22 |
| Pagina iniziale: | 1129 |
| Pagina finale: | 1140 |
| Codice identificativo ISI: | WOS:000295538800002 |
| Codice identificativo Scopus: | 2-s2.0-80053613143 |
| Citazione: | Modeling of Wire-on-Drum Shape Memory Actuators for Linear and Rotary Motion / G. Scirè Mammano; E. Dragoni. - In: JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES. - ISSN 1045-389X. - STAMPA. - 22(2011), pp. 1129-1140. |
| Tipologia | Articolo su rivista |
File in questo prodotto:
http://hdl.handle.net/11380/671047
I documenti presenti in Iris Unimore sono rilasciati con licenza Creative Commons Attribuzione - Non commerciale - Non opere derivate 3.0 Italia, salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
Copyright © 2019