The Nonlinear Material Behavior add-on allows you to consider material nonlinearities in RFEM.
More about Nonlinear Material Behavior:
https://www.dlubal.com/en-US/products/add-ons-for-rfem-6-and-rstab-9/additional-analyses/nonlinear-material-behavior
Download the free trial versions and get to know the new RFEM 6 with its add-ons:
