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Bi-laterally constrained buckling of a column (shell) using dynamic explicit analysis

Bi-laterally constrained buckling of a column (shell) using dynamic explicit analysis

Bi-laterally constrained buckling of a column (shell) using dynamic explicit analysis

(OP)
https://www.youtube.com/watch?v=hs7HzjIPQ0U&fe...

This is a side view video of the simulation. It consists of two immovable steel constraints (shells) at a set distance confining a composite column (shell) that is made to buckle under clamped clamped conditions. Once the column buckles, its center travels outward and makes contact with the opposing constraint. As more displacement is imposed axially on the end of the column, the areas in contact with the constraints grow until re-buckling occurs at the area of longest contact. For some reason the system becomes unbounded at some point (i dont know if unbounded is the right word here, the column collapses into a big mess of shapes and the solution doesnt follow). There are no failure criteria defined for the shell, and in my mind this should not be happening. if anyone has any experience with this, or any idea how to stop it from happening i would greatly appreciate it, as i need to evaluate this system to higher loads. Is it possible the shell reaches a maximum amount of load and curvature or something? i really dont know and it would be a great help to me.

Sincerely
AV

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