Hello Martin
Have you already seen our TEDDY Example Files?
For information about a material non-linear analysis of QUAD elements you should look at the example:
TEDDY > File > Examples > ase > english > nonlinear_quad > a1_introduction_example.dat
For general information about the SLS design workflow for QUAD elements check out the following example:
TEDDY > File > Examples > bemess > english > bemess1_all_sls_design_checks.dat
Best regards
Frederik Höller
Your SOFiSTiK Support Team