Convert the Stress-Strain into True Stress-Strain in the theoretical model

- June 6, 2020 at 9:02 pm
  
  Andreyteston
  Subscriber
  
  Hello, members.
  
  I would like to use the constitutive model for concrete by Tao (2013), which has a descending part after the maximum stress on the stress-strain relationship.
  
  When I am using a theoretical constitutive model, as an example I can use the constitutive model present on the Eurocode, illustrated below. Is it necessary to convert theoretical stress-strain curves to true sreess-strain curves?
  
  I wonder if any member could help me.
  
  Regards