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FEM: 2d analyses with 3d-based code

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GirE

Civil/Environmental
Feb 8, 2018
2
Hello!

I have a question regarding some simulations I need to run.
I have a finite element code able to reproduce 3D problems. With this code I would need to run some analyses by considering a 2D body (in order to compare my results with other results on the same examples run with a 2D-based code).

Does anyone have any similar experience? What assumptions have you done? I was thinking of making a very thin third dimension, and apply plane stress / strain conditions (based on the thickness of the real specimen in relation to the other two dimensions).

Many thanks
 
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If you use a 2D element, you can apply a plane stress or plane strain condition to account for the anticipated behavior in the third dimension.

If you use a 3D element, you do not (can not) apply a plane stress/strain condition to the element. The thickness itself accounts for the behavior in the 3rd dimension.

Brian
 
and rotational freedoms at each grid.

another day in paradise, or is paradise one day closer ?
 
I think the point was that 3D elements don't consider plane stress/plane strain, but 2D elements do.

another day in paradise, or is paradise one day closer ?
 
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