How to insert Descending Branch part (Residual Part after the peak load) in Concrete stress strain.

I model the Concrete MISO model in the stress strain (Engineering Data Part) but I can't insert any descending branch. Ansys said that the gradient of the stress strain should not be negative. Hence I only can insert from 0 to the maximum stress without my descending part. I need it since I look for its ductility. What should I do.?


  • edited June 2018


      You will need to convert the data to true stress-strain instead of engineering stress-strain. Please use the following relations to do that:

    σ-t=σ-e (1+ε-e), ε-t=ln(1+ε-e)

    "-t" represents "true", "-e" represents "engineering"



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