Ansys Learning Forum Forums Discuss Simulation General Mechanical Problem with flex sheet Reply To: Problem with flex sheet

peteroznewman
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The archive you shared is not a 2D plane strain model.  It is a 3D model.  See where it says Analysis Type 3D.  That would say 2D if you had a 2D model.  Just having sheet bodies in the XY plane is not sufficient to get to a 2D model.

Once you have built the model in 3D, that analysis can’t be switched to 2D later. You have to start over with a new analysis and set it to 2D before you open the Model cell.

If I start a new analysis, I can link to the Geometry cell, but in the new analysis, I set it to 2D.  Then when I open the Model cell, I can specify what type of 2D analysis I want. In this case it is Plane Strain.

The solution is easier and faster if you take advantage of half symmetry. Here is the result:

It is difficult for the contact algorithm to have the punch separate from the sheet. I used Contact Step control to soften the contact after step 1, then move the punch up to the point just before contact separation, then I made the contact “Dead” in the next step and finally moved the punch up some more.

Here is the ANSYS 2022 R2 archive: https://jmp.sh/kboP9lt