Initial Contact Compression on Thin Walls with Single Element through the Thickness

[srwopschall]

I have a block impacting a thin walled cylinder with a single element through the thickness. At time t=0, there are nonzero contact forces with clear marking of the domain boundaries. I believe this is because the opposite faces of the thin elements are being detected as 'in contact'. The auto contact penetration scale should catch this and avoid marking those faces as candidates, but this does not appear to be happening.

[srwopschall]

The above issue appears when using redecomp. The auto contact penetration factor is actually not set in the redecomp code path. This needs to be fixed.

[srwopschall]

This may not be an issue in redecomp, but an issue with proper auto contact integration into a host code. The element thickness calculation still needs to be studied as it applies to the auto contact penetration factor.

[srwopschall]

Testing confirmed an integration issue and not an immediately apparent issue with redecomp or the element thickness calculation used for the auto contact length scale.