How can I calculate Failure Index by using ANSYS Composite PrepPost?

- December 11, 2021 at 12:33 pm
  
  Patricia
  Subscriber
  
  Hello everyone!
  I am a student of Industrial Engineering Master's Degree. I am currently developing my Final Project and it would be very helpful if someone could please help me with one specific doubt.
  I need to use ANSYS Composite PrepPost tool to calculate the Failure Index of a Flat Plate. However, I was not able to find this parameter in the program. The most similar factor I have found is Inverse Reserve Factor within the Composite Failure Tool, but it is not what I need.
  The definition of the needed index is as follows:
  Failure Index = Ply strain/ Limit strain
  When the result is greater than 1, failure is predicted in the ply.
  Do you know if there is any way to calculate the Failure Index in ANSYS PrepPost, directly or indirectly?
  
  Thank you in advance and Kind Regards
- December 14, 2021 at 7:33 am
  
  Vinayak Vipradas
  Ansys Employee
  
  To calculate Failure Index for composite ply structures you can use the Composite Failure Tool.
  For detailed information on Composite Failure Tool, please refer to the following link:
  Composite Failure Tool (ansys.com)
  
  Regards Vinayak
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  - January 26, 2023 at 9:00 am
    
    Rameez_ul_Haq
    Subscriber
    
    I tried alot to find some data on how can we actually observe the Failure Index and/or Strength Ratio for, say, Tsai-Wu criteria for a composite material made of several plys. I couldn't find anything useful. Could you kindly elaborate on where exactly to look in the 'Composite Failure Tool' section? Thank you.