MODEL AND EXPERIMENTAL VERIFICATION ON ACTUATOR OF MAGNETICALLY CONTROLLED SHAPE MEMORY ALLOY

Abstract

Magnetically controlled shape memory alloys (MSMA) offer a new way of producing motion and force, the most common usage of the materials are in the linear actuators. In order to design the MSMA actuators, modeling of the input dependence of the output for the actuators is necessary. Based on the calculation method of magnetic field-induced stress and the thermodynamic model, the models of output strain and force are presented for MSMA actuator in this paper. The model can quantitatively calculate the output strain and force dependence of the input magnetic field, temperature and stress. The output strain for a MSMA actuator is calculated, it is found that the calculating results are in a good agreement with the experimental ones, these indicate the validity and practicability of the actuator model.

DOI: http://dx.doi.org/10.5755/j01.mech.18.3.1872