Steel parallelepiped simulation

[aliex]

Hello,
I am currently working on the creation of steel parallelepipeds with a square cross-section in the unloaded state exactly into the cavity with ideally rigid
walls and can slide against them with friction.
since the walls are rigid, the displacements of steel blocks in X- and Z- direction must be almost zero, which is not my case (see picture in appendix).

i don't know how can i look at the walls as rigid in APDL.

For APDL please select "Case C".

Thank you very much for your help.

Many Regards

 

[karachun]

Don’t model stiff wall, apply constraints instead. According to your second picture - fix TX, TY and TZ on bottom surf and TX or TZ on sidewalls. And due to uniformity of stress state you can model this problem only with one element.