Spline elements with contact not working?

[ateixeira0163]

Hi!
I've been trying to use Spline elements with self-contact, but by simply changing the contact enable option from disable to enable in a cantilever problem, the simulation gives me two different results depending on the mesh refinement (which I find quite weird), being:

Unable to solve, initial solution has intersections! (even though there's only one mesh/object present in the simulation and it is a straight rod made from hex elements using gmsh)

Segmentation fault

Is this behavior normal? And if it is are Lagrange elements the only option for contact? And if it is the case, are there more examples for remeshing in high-order elements after restarting a simulation? (for example, by deforming a rod, saving its state and then restarting from the .hdf5 file but refining the start mesh to adapt to contact regions/deformations for example?)
Thanks and great work :D

[zfergus]

I have never tested contact with Spline elements. I know contact works with higher-order Lagrange elements (both tets and hexes). If you could share an example JSON and mesh with spline elements and contact, I can try to take a look time permitting.

Changing the rest mesh upon restart will not work currently because the restart displacements/velocity/acceleration need to be upsampled. This is not implemented.

[ateixeira0163]

Sure!
splinetest.json
Mesh.zip (I've zipped because it seems that git doesn't allow .msh files.
Thanks!