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Influence of some extrinsic factors on the two way shape memory effect of electric actuators

L.-G. BUJOREANU1,* , S. STANCIU1, A. ENACHE1, C. LOHAN1, I. RUSU1

Affiliation

  1. The “Gheorghe Asachi” Technical University from Iaşi, Faculty of Materials Science and Engineering, Bd. D. Mangeron 63, 700050 Iaşi, Romania

Abstract

The paper analyses the reproducible behaviour of three work generating applications of shape memory electric actuators, trained for two way shape memory effect (TWSME) in bending. The first is a lifting device, the displacement-temperature variation of which is considered as a function of time while revealing the influence of applied load. The second is an electric circuit breaker (disjunctor) for electric overload protection, the functioning of which is compared to that of a bimetallic thermostat, while revealing the influence of applied voltage. The third is a composite with polymeric matrix, the geometrical evolutions of which are monitored as a function of temperature, while revealing the influence of matrix on the bending reproducible behaviour. A comparison is performed between the critical transformation temperatures of the three devices, by emphasizing the influence of extrinsic factors on their mechanical responses..

Keywords

Cu-Zn-Al-Ni, Shape memory alloys, Actuator, Mechanical response, Critical temperatures, Reproducibility.

Submitted at: Feb. 12, 2008
Accepted at: March 17, 2008

Citation

L.-G. BUJOREANU, S. STANCIU, A. ENACHE, C. LOHAN, I. RUSU, Influence of some extrinsic factors on the two way shape memory effect of electric actuators, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 3, pp. 602-606 (2008)