August 2, 2023 at 5:56 pm
Bill Bulat
Ansys Employee

Hi Yuxing,

I'm not quite sure what the problem with your model is. I created a test case with pretty much the same INISTATE commands you used:

 

There are no externally applied loads in my model (just constraints). I get significantly nonzero stresses:

The initial stresses are listed in the solve.out file by the INISTATE,LIST command:

 

 

If I comment out the commands in the command object and rerun, I see (as expected) zero stress:

Maybe your constraints only prevent rigid body motion? Maybe you can do some testing without additional applied pressures (as I did) to help you identify the problem?

--Bill