Learning Forum

[576650550]

I will drag the files saved in Mechanical into a newly created Mechanical, and then link the new Mechanical to the geometry module. In the geometry, I want to save it as a .step file, but DesignModeler will execute the transform command to convert the Workbench model to the DesignModeler format.

However, this command keeps failing, The error message is “Some or all bodies cannot be converted to DesignModeler format.”.

I can export it when performing other static analysis. The model I am failing with is a micro-debonding model with a CZM (Cohesive Zone Model).

What could be the reason for this consistent failure?

Thank you very much.

[Gary Stofan]

Converting a deformed mesh into an editable CAD format is not a robust process. 

It sounds like your model may have very small dimensions. 

Sometimes you can get a successful conversion by upscaling the deformed model prior to conversion.

There are some good tips in this forum post:     How do I get deformed geometry   

Or search the AIS for "deformed convert to Parasolid"

[576650550]

FE Modeler was not banned. It was Unsupported for several releases, then the code was eventually removed. 
Q: Is it absolutely necessary for you to convert the deformed model back into an editable geometry? 


As far as scaling, upscale the entire deformed mesh by say  x*100, y*100, z*100 

Example: 

Insert these Commands in the Solution branch of Mechanical/Simulation 

Here is an example Commands object that is used to Up-scale by 1e2 (x100) and create a .CDB file. 

------------------------ 
save 
finish 
/prep7 
upgeom,,,,file,rst 
nscale,0,all,,,1e2,1e2,1e2 
cdwrite,db,new_geom,cdb 
finish 
------------------------ 

[Gary Stofan]

 

Hello.
Please describe or show a screenshot of how you “imported the new mechanical model into geometry”.

In general, Parsolid conversion is more successful when the unit system is in a larger dimension, usually meters. 

Another alternative is to use the .STL export, and see if it converts successfully into SpaceClaim or Discovery. 

 

 

 

[576650550]

Because there are many tiny metal structures embedded in the substrate, it is difficult to repair the stl file well after it is exported

 

[576650550]

[Gary Stofan]

You can try the following upscale. There are no guaranteed methods to make this work however. 

Insert these Commands in the Solution branch of Mechanical/Simulation. 

It will make a new_geom.cdb that you can manually read into the Mechanical Model. 
Note that I show an upscale of 1e6. You could try other values like 1e3

save 
finish 
/prep7 
upgeom,,,,file,rst 
nscale,0,all,,,1e6,1e6,1e6 
cdwrite,db,new_geom,cdb 

 

[576650550]

I want to simulate the model with 0.00-um deformation in HFSS. This is my Model. I can translate to another Mechanical. But the model couldn't be converted into DM format.

[576650550]

Can the small deformation model of connect debonding be exported?

[Gary Stofan]

If you upscale the deformed mesh (.cdb) as per the instuctions I provided, the chances of DM being able to convert into Parasolid are improved.
 

 

[576650550]

The workbench format model cannot be converted to DM format

[576650550]

not DM convert toParasolid

[Gary Stofan]

The .CDB is not directly converted to DM format. 

The transfer from A6 Solution to B3 Model is via .CDB file. 
The transfer from B3 Model to C2 DM Geometry via .PMDB file. 

 

[576650550]

Yes I followed the procedure， but when I export stp model，fail. Should I only keep the result of deformation in A6, I keep the stress and deformation results

[Gary Stofan]

In this example, I am using the "upscaled" .CDB (new_geom.cdb) as input to External Model.
We can confirm from Mechancial Model that the model is now much larger. 
A larger dimension model may have a better chance of successfully converting to a solid, however it is not guaranteed. 

 

 

 

[576650550]

When I export a Model, the message is: "Unable to save the file. The model geometry is invalid for this save operation."

[576650550]

The model is now much larger. It seems like a mesh problem, I guess. 

[Gary Stofan]

Do you require a solid geometry file? Can you use the deformed Mesh for further analysis? 

[576650550]

yes, But I want to export this model (deformed) as a solid file and import it into HFSS. When I export this model in DM, the message is: "Unable to save the file. The model geometry is invalid for this save operation."

[576650550]

It cannot directly drag lines from  to HFSS in Workbench, so I need to export the file as an x_t or step file.

[576650550]

Thanks for reminding me. And I can't use the deformed Mesh in AB for further analysis in mechanical

[576650550]

What other methods are there?

[576650550]

Is there any problem with this?

[iskillsebt13]

Sure! Here's a short and relevant version:

---

I imported the mechanical model via Parasolid (.x_t) using meters as the unit system, which helped avoid scaling issues. STL export also worked well for SpaceClaim.

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