Thanks very much for your help and reply.

1. I meet a convergence issue when I give the BCs as the fixed rotation and the displacement at the 2 surfaces on the corner(since that is my real BCs when I was running the experiment). I tried to change the iteration times from default 26 to 60, but it does not work and as for the command, I give the selection mode ALL, which is marked in black color on the following figures. besides I also upload the workbench file with it. thanks very much for your help


Best Regards