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
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