Shape Memory Alloy Paper Movement

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This picture is an attempt to replicate the folding paper work of Jie Qi at the High-Low Tech Lab at MIT.  Jei Qi’s example of this is called input/output paper with the website:  http://technolojie.com/inputoutput-paper/ and http://fab.cba.mit.edu/classes/MIT/863.10/people/jie.qi/flexinol_intro.html.  For this product, 0.75 mm diameter Nitinol wire was used which is in the Martensitic phase at room temperature and has a Austenite finish temperature around 60 C.  From this initial attempt the main idea learned was the gauge length of the wire is important for paper applications.  Jei Qi uses a material called Flexinol whose diameter is 0.1524 mm, which is significantly lower than the previously used Nitinol.  A video of the paper unfolding can be seen at:  http://youtu.be/Z7m6Y8dL0jo.

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