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FEM CalculiX tie constraint doesn't work with shell surfaces #13305

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2 tasks done
FEA-eng opened this issue Apr 5, 2024 · 0 comments
Open
2 tasks done

FEM CalculiX tie constraint doesn't work with shell surfaces #13305

FEA-eng opened this issue Apr 5, 2024 · 0 comments
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Feature FR for improvements or new features WB FEM Related to the FEM Workbench

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@FEA-eng
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FEA-eng commented Apr 5, 2024

Is there an existing issue for this?

  • I have searched the existing issues

Problem description

This is related to #13280 - not only tie constraints and contact can't be applied to edges but tie constraint doesn't work with shell surfaces. The following error appears:

Shell mesh is not allowed for constraint tie.

and the generated input file contains empty surface definitions:

*SURFACE, NAME=TIE_DEPConstraintTie
*SURFACE, NAME=TIE_INDConstraintTie

Most likely because of this sentence about *TIE in the CalculiX documentation:

It can only be used with 3-dimensional elements (no plane stress, plane strain, axisymmetric, beam or shell elements).

But it has been proven many times that this sentence must be outdated and should be removed from the documentation because tie constraints work very well with 2D elements.

Tie shell.zip

@marioalexis84 FYI

Full version info

OS: Windows 10 build 19045
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.36731 (Git)
Build type: Release
Branch: main
Hash: ac1d887336826c59321352f49a195bf1ef8be2f0
Python 3.11.8, Qt 5.15.13, Coin 4.0.2, Vtk 9.2.6, OCC 7.7.2
Locale: Polish/Poland (pl_PL)

Subproject(s) affected?

FEM

Anything else?

No response

Code of Conduct

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@maxwxyz maxwxyz added WB FEM Related to the FEM Workbench Feature FR for improvements or new features labels Apr 6, 2024
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Labels
Feature FR for improvements or new features WB FEM Related to the FEM Workbench
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Status: Feature Request Priority
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2 participants