peteroznewman
Subscriber

Under Analysis Settings, change the Large Deflection setting to ON and solve the model to see if the radial expansion effect goes away. Note that you might also have to change Auto Time Stepping to ON and set the Initial and Minimum Substeps to 10.

Yes, the 2D axisymmetric model with axial tension has a different stress pattern and is also what I would expect to see, but that is a different load to the moment.