Hi, I want to simulate the shape memory effect of nitinol and I'm having trouble figuring it out. Basically, I want to create a 3D CAD simulation of a part made out of nitinol and the effects of temperature to it. So basically if I make a coil and then deform it a little bit but then heat it up to past its austenite finish temperature it'll go back to its original shape. I have access to Solidworks, Ansys, and Abaqus. Any advice would be appreciated. If you need more clarification of what I'm trying to do let me know. Thanks.
Hello,
There are many different ways that you could do that.
The easiest way, yet less accurate, would be to define a material that has a temperature dependent coefficient of thermal expansion and then define the temperature limits and dummy coefficient of thermal expansion values that would generate the required deformation.
A better way to simulate it would be to either already implemented material models (if available) in the version of the software you have (for example some ANSYS and Abaqus versions offer this capability).
Also, for Abaqus, you may use a UMAT (here is a link for a one that I have written based on the model of Lagoudas and that is freely available: https://github.com/AnargyrosKarakalas/UMAT_3D).
Best regards,
Anargyros
Follow these videos for ANSYS
1) https://www.youtube.com/watch?v=bjlVCnkH8-I
2) https://www.youtube.com/watch?v=gY60QDIKwlU
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