Dears,
I have a cylinder subjected to an internal pressure of 10 MPa, the cylinder diameter is 1400 mm. I am trying to model it in my FEMAP. I am comparing the average stress (TOP and BOT Y) with the stress that come from the formula
hoop_stress=pressure.Radius/thickness
The stress I obtained is similar with the one that is from the formula, but the deformed is not equal, it is crazy !
I am not sure about the constraints I have applied in my FEM model, supposing a cylinder pressurized how the constraints must be set in the free borders ?