# 3D Simulation of 2D Geometries

**URL:** <https://calculix.discourse.group/t/3d-simulation-of-2d-geometries/4022>\
**Category:** Model setup\
**Created:** [June 25, 2026, 10:53am UTC](https://calculix.discourse.group/t/3d-simulation-of-2d-geometries/4022 "2026-06-25T10:53:26Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Disla](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/disla/32/3548_2.png) [@Disla](https://calculix.discourse.group/u/Disla)\
**Post date:** [June 25, 2026, 1:25pm UTC](https://calculix.discourse.group/t/3d-simulation-of-2d-geometries/4022/2 "2026-06-25T13:25:53Z")

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> [@James\_G](#):
>
> Has anyone worked to replicate plane stress and plane strain assumptions in CalculiX without using the “2D” elements

Yes.Take a look at this thread. [Plane Stress Problem - #31 by Disla](https://calculix.discourse.group/t/plane-stress-problem/2253/31)

Z-unrestrained 3D solid element is not the same as a Plane Stress Solution.

The problem is that it was achieved playing with the material properties which in your case I’m not sure you can.

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