ustruct tests (P1P1-VMS block compression, tensile adventitia HGO, LV Guccione active)

[MatteoSalvador]

With reference to #95, this MR introduces three tests for the ustruct formulation.

[mrp089]

Sorry @MatteoSalvador, I hit approve by accident! I leave my comments in a second/

[mrp089]

The LV displacements (here magnified by 1e5) look weird. It looks like only the apex deforms. Does the displacement make more sense if you run it for more time steps?

[mrp089]

On one core on the Ubuntu 20 GitHub runner, the tests take

• block-compression: 1.5 s (super fast, nicely done!)
• LV-Guccione-active: 33 s
• tensile_adventitia_HGO: 28 s

Is there an easy way to coarsen the latter two geometries? Or even more radical, if we're just testing different materials with ustruct, can we use a single element (which should be easy to set up)?

[mrp089]

@MatteoSalvador, done with my comments! Thanks for taking the time to dig into how ustruct works and setting up those tests!

[mrp089]

If there's an overlap with #115, can you reuse the geometries and just add a second input file?

[MatteoSalvador]

@mrp089 all ustruct tests should run within a few seconds now.
I have also (re)checked that the numerical simulations over 100 time steps make sense.