Plastic behaviour of 2D members
To be able to model plasticity you should enable the following functionalities:
- Nonlinearity
- General plasticity
![Activate these functionalities to be able to model plasticity](/sites/default/files/styles/embed_medium/public/images/2022-03/SPTFMeYti3.png?itok=_IpexxVC)
Once these functionalities have been activated, a plastic behaviour can be assigned to the used materials in your project. Go to the material library (Libraries > Materials) and change the filter for the materials to ‘Used’ (see image). The material behaviour can be changed from ‘Elastic’ to ‘Isotropic elasto-plastic’ combined with a specific yield criterion. For steel materials the type ‘Isotropic elasto-plastic, Von Mises’ is advised.
![Material properties](/sites/default/files/styles/embed_medium/public/images/2022-03/pErRodWFP8.png?itok=SJ3zJCrb)
Next you can choose between an elasto-plastic behaviour with or without hardening. Enter the maximum yield stress and a hardening modulus if necessary.
![Non linear material properties](/sites/default/files/styles/embed_medium/public/images/2022-03/0q9g2Akib7.png?itok=IlMyplZ2)
Finally, create some nonlinear combinations and the plastic behaviour will be taken into account in the nonlinear calculation.