Dear Forum,
My FEM calculations misbehave.
This my input:
This my output:
Obviously, the L-profile is not attached to the bottom plate. How can I arrange that?
Part is a compound made from faces and wires:
Part is invalid, says Part WB (I do not know what that exactly means):
Do you have any clues for me?
Best regards,
Roland
On:
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16117 (Git)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: dbb4cc6415bac848a294f03b80f65e888d531742
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedKingdom (en_GB)
[SOLVED] FEM: elements do not stick together (invalid geometry?)
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[SOLVED] FEM: elements do not stick together (invalid geometry?)
Last edited by Roland on Thu Oct 17, 2019 1:15 pm, edited 1 time in total.
Re: FEM: elements do not stick together (invalid geometry?)
I found perhaps part of the answer.
To create a valid part: Select all, PartWB/Boolean/Union. This gives a Fusion that is "valid".
However, now FEM gives errors. I am analyzing this further, and shall revert soon.
Roland
To create a valid part: Select all, PartWB/Boolean/Union. This gives a Fusion that is "valid".
However, now FEM gives errors. I am analyzing this further, and shall revert soon.
Roland
[SOLVED] Re: FEM: elements do not stick together (invalid geometry?)
All solved. After the Union command was done and the geo was "valid", I made a FEM mistake of incomplete definitions of shell plate thickness.
The Union command increased the amount of shells. (which I overlooked).
Suggestion: There are multiple FEM wikis around, only one of them mentioned the need of Fusion. Compare:
https://www.freecadweb.org/wiki/Manual: ... M_analyses
https://www.freecadweb.org/wiki/FEM_tutorial
Perhaps make this more uniform (I know ... time ...)
Thaks for this great software!
Roland
The Union command increased the amount of shells. (which I overlooked).
Suggestion: There are multiple FEM wikis around, only one of them mentioned the need of Fusion. Compare:
https://www.freecadweb.org/wiki/Manual: ... M_analyses
https://www.freecadweb.org/wiki/FEM_tutorial
Perhaps make this more uniform (I know ... time ...)
Thaks for this great software!
Roland
Re: [SOLVED] Re: FEM: elements do not stick together (invalid geometry?)
Hi Roland,
welcome to FreeCAD FEM.
cheers bernd
welcome to FreeCAD FEM.
You could get wiki write permissions and just add what you have encountered.Roland wrote: ↑Thu Oct 17, 2019 1:15 pm All solved. After the Union command was done and the geo was "valid", I made a FEM mistake of incomplete definitions of shell plate thickness.
The Union command increased the amount of shells. (which I overlooked).
Suggestion: There are multiple FEM wikis around, only one of them mentioned the need of Fusion. Compare:
https://www.freecadweb.org/wiki/Manual: ... M_analyses
https://www.freecadweb.org/wiki/FEM_tutorial
Perhaps make this more uniform (I know ... time ...)
cheers bernd
Re: [SOLVED] FEM: elements do not stick together (invalid geometry?)
Thanks, Bernd, for the suggestion to give wiki write permissions.
However, at this stage I am not competent to make proper use of it.
In stead, let me propose some adaptations to the wikis, for others to consider and implement where needed.
Best regards,
Roland
However, at this stage I am not competent to make proper use of it.
In stead, let me propose some adaptations to the wikis, for others to consider and implement where needed.
Best regards,
Roland