Abstract:

A method of improving the work frequency of shape memory alloy wire actuators, developing fine wires, is investigated.The relation between the response frequency and the diameter is analyzed theoretically in different processes of heating and cooling a wire.The theoretical predictions are validated with experiments.The results show that the decrease of the diameter of a wire can not affect its phase transformation properties, but its work frequency can be increased markedly.

Key words: shape memo ry alloy, actuato r, wo rk frequency, smart st ructure