Expansion of thin cylinder over time in Abaqus

[johnnny1]

I need to model a balloon like structure that must expand at a certain rate per second.

I've looked at applying pressure internally on the cylinder but I am not able to control the displacement rate this way.

I've also looked at applying a displacement through boundary conditions but I am not getting the results I want.
As it is a cylinder I am finding it difficult to apply displacement equally around the whole surface.

Does anyone know if this is possible and if so any tips would be appreciated

Ive attached a picture
Thanks

 

[missil3]

Not sure about abaqus, but I do this in LS-Dyna by applying a time varying Load on the shell segments. that way they will expand at a rate your load varies.

Also see if you can use the control volume approach where your cylinder can be "inflated" by applying a constant pressure. You can control the mass flow rate and thereby control the pressure.