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Curro Capi de Camas

How to extract the Best middle surface

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Hi 

 

It depends on the type and complexity of the geometry. You can share the model or any images for better understanding.

Have a check at these generic videos on Midsurface creation.

https://www.youtube.com/watch?v=dVhdewZupGs

https://www.youtube.com/watch?v=WQr9huW_TEI

 

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Geometry is complex with curves and edges, but I have the criteria necesary to obtain and adjust to it, for example:

 

#    Criterion     On  Wt   Ideal    Good    Warn    Fail   Worst  Solver 

 0 penalty value              0.00    0.00    0.80    1.00   10.00         
 1 min length        1 1.0    5.00    4.00    3.80    3.50    3.00       0 
 2 max length        1 1.0    5.00    6.00    6.50    7.00    7.50         
 3 aspect ratio      1 1.0    1.00    2.50    3.50    5.00    9.50      12 
 4 warpage           1 1.0    0.00    1.00    2.00    5.00    9.50      12 
 5 max angle quad    1 1.0   90.00  105.00  123.00  135.00  142.50       0 
 6 min angle quad    1 1.0   90.00   75.00   57.00   45.00   37.50       0 
 7 max angle tria    0 1.0   60.00   76.66  103.30  110.00  135.00       0 
 8 min angle tria    1 1.0   60.00   45.00   35.00   20.00   10.00       0 
 9 skew              1 1.0    0.00   10.00   15.00   20.00   33.00      12 
10 jacobian          0 1.0    1.00    0.90    0.70    0.60    0.30       0 
11 chordal dev       0 1.0    0.00    0.30    0.80    1.00    2.00         
12 % of trias        1 1.0    0.00    2.00    4.00    4.90    5.00         

 

Is there some automatic tool to create it or have the best mesh adapted to it?

 

thanks in advance...

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Hi Curro Capi de Camas


As Q.Nguyen-Dai mentioned, the parameters you mentioned above are for checking the quality of FE Mesh

18 hours ago, Curro Capi de Camas said:

Is there some automatic tool

However, check whether these TCL scripts can help you.

 

weldedStructureMidSurfTool_v3.8.tcl

This Scripts can be used for Structures, where each Component represents one sheet metal part of uniform thickness. For each Component one midsurface component and one associated property will be created. The comp/prop names use the volume components name following a thickness string.
The assembly hierarchy of the solid model is mirrored for the midsurface model.

 

CheckQualityOfElements.tcl

This script checks the displayed elements for quality. the checks are the standard checks of the check elements panel. threshold values are set in script
failed elements are put into sets element and node sets
 

 

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On 2/20/2019 at 7:08 AM, Pranav Hari said:

Hi Curro Capi de Camas


As Q.Nguyen-Dai mentioned, the parameters you mentioned above are for checking the quality of FE Mesh

However, check whether these TCL scripts can help you.

 

weldedStructureMidSurfTool_v3.8.tcl

This Scripts can be used for Structures, where each Component represents one sheet metal part of uniform thickness. For each Component one midsurface component and one associated property will be created. The comp/prop names use the volume components name following a thickness string.
The assembly hierarchy of the solid model is mirrored for the midsurface model.

 

CheckQualityOfElements.tcl

This script checks the displayed elements for quality. the checks are the standard checks of the check elements panel. threshold values are set in script
failed elements are put into sets element and node sets
 

 

Thanks a lot for your quick reply and help

 

I will try.... and let you know

On 2/20/2019 at 7:08 AM, Pranav Hari said:

 

On 2/19/2019 at 2:57 PM, Q.Nguyen-Dai said:

FE

 

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Hello Pranav Hari,

 

Thanks for the TCL scripts.

 

I don´t understand exatly the "CheckQualityOfElements.tcl". My idea is to define a good middle surface geometry in order to mesh it later. The middle surface is not bad with yout TCL "weldedStructureMidSurfTool_v3.8.tcl" but the problem is when I need to get meet the mesh criteria fullfiled like the photo attached.

 

Is there any automatic tool like TCL that can help to do it?  In 2D/Quality Index/Cleanup tools there are some options to repair it manually...

 

Regards

ScreenHunter_1.jpg

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13 hours ago, Curro Capi de Camas said:

Is there any automatic tool like TCL that can help to do it?  In 2D/Quality Index/Cleanup tools there are some options to repair it manually...

 

Hi Curro Capi de Camas

 

As you mentioned,  since you need to check the mesh quality for different quality criterion, then the CheckQualityOfElements.tcl can help you. 

Instead of setting the quality criterion manually in HM, you can set it in the script (edit the script with your quality parameters) and the script automatically stores the failed elements in sets.

 

image.png

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