Aborted simulation when pressurizing the chamber of a silicone model

[11029453]

Currently running an Abaqus simulation to model pressurizing a chamber inside a soft pneumatic actuator. However, I'm running into an issue where Abaqus aborts due to time increment error, so the chamber isn't pressurized all the way to the 200kPa I specified it as (stopped at 5kPa). Parameters:
[ul]
[li]Hyperelastic material (silicone), using test data. Doing a material evaluation on Abaqus, it is stable for all stress and strains.[/li]
[li]Boundary condition set as encastre at the fixed end.[/li]
[li]Two loads: gravity and pressure.[/li]
[li]Frictionless interaction between all surfaces.[/li]
[li]Mesh: Seed size is ~2.5% of the overall length. Tet with hybrid formulation selected.[/li]
[li]Nlgeom is turned on because I'm modelling a non-linear material.[/li]
[/ul]

I've tried changing mesh size, increment size, and iteration step size, but still no luck.

Anything I'm missing? Any help would be appreciated!

 

[FEA way]

I assume that these parts are thin-walled - have you tried using shell elements ? Consider different boundary conditions, encastre may overconstrain your model, try using symmetry instead (if possible of course). Finally, enable automatic stabilization in step settings and see if this helps.