Hello Simulia community,

I am modeling a cylindrical shell consisting of two holes diagonally situated. An analytical rigid cylindrical surface (lifting pin) passes through and through these holes. I am using General Contact to simulate the contact between the rigid surface and the shell. The only load is "gravity". This is to simulate the lifting of the cylindrical shell with the aid of analytical surface. See picture below.

I am receiving the below warning. However, my solution do converge. Tried changing the contact to surface-to-surface, but it does not allow an shell edge to contact the analytical surface. Please advise how can I handle this warning message.

"The general contact domain for modeling contact interactions in Abaqus/Standard has double-sided facets. Initial contact adjustments for resolving gaps and  overclosures when a surface with double-sided facets is paired with any surface having double-sided facets may be incorrect. Similarly, adjustments for double-sided surfaces crossing each other may be incorrect and no additional warnings or error messages will be issued. In all these cases, we recommend using single-sided surfaces under *CONTACT INITIALIZATION ASSIGNMENT to  handle initial adjustments more precisely and avoid  possible convergence problems."