Missing alternating stress mean stress under engineering data

- March 22, 2020 at 9:55 pm
  
  nrj0025
  Subscriber
  
  I have recently downloaded Ansys and was trying to do some static structural analysis on Nitinol SMA. I couldn't find nitinol as a material in the database so I have been trying to follow a tutorial that I had found for implementing nitinol data to create it. But the tutorial requires adding alternating stress mean stress data but I seem to not have that as an option under the life tab when creating new material. So I was wondering if there is an option to add it or if it is an option that is lacking in the student version of Ansys.
  
  Thanks
- March 26, 2020 at 1:51 am
  
  Karthik Remella
  Administrator
  
  Hello,
  
  Moving this question to the Structural Mechanics page in the hope that your question finds some visibility.
  
  Thank you.
  
  Best,
  Karthik
- March 26, 2020 at 3:31 pm
  Wenlong
  Ansys Employee
  Hi nrj0025,
  
  Here is the SMA material reference:https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/ans_mat/smas.html?q=SMA
  
  Can you please explain what alternating stress and mean stress is and why they are needed to define SMA? I don't recall an SMA material model need such information. Here are the inputs needed for Shape memory effect. If you are to model the superelasticity, then you need a different set of inputs.
  
  Regards,
  
  Wenlong
  
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