So, for a given leg structure, the value of the rotating angle depends directly of the length of the muscle wire.
Elastic rubber wires are used to return the links of the leg to the initial position, when the muscle wires are no more powered.
Shape memory alloys (SMA, smart metal, memory metal, memory alloy, muscle wire
, smart alloy) are alloys that "remeber" their original, cold-forged shape by returning to the pre-deformed shape by heating (Gumpel & Mitautoren, 2004).
The two programmed sculptures display silver and purple Mylar "blossoms," which are attached to muscle wire
, those "shape memory" filaments that contract when electricity passes through them.
Check out the surrounding You Tube videos and the stuff on muscle wire
whose potential for cheering up drab, repetitive building facades can't be over-estimated http://tinyurl.
Their fabric, being worked on by engineer Aaron Waxler, features muscle wires
made of nickel and titanium that can change size and shape at different temperatures.
It's easy to add attachment points for muscle wires
to the 3D bone models using trueSpace and then send the new files to the desktop milling machine.