What kind of grasshopper plug-in should I use to do structural/form analysis? There are a weight of hexagonal concrete (thickness : 0.7m) and lunar gravity (1.62m/s²) and internal pressure of dome14.7 PSI?
I doubt you gonna find an implementation in GH not connecting to an external paid software. I know there are plugins for the plugin Kangaroo2, a master thesis for structural analysis but never used it.
Yes, it is commercial software, though there is a 7 day full featured trial.
I thought of it here because not needing to mesh or otherwise discretize the geometry simplifies setup quite a bit.