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Invalid Geometry in the file created from saving deformed simulation results

Question asked by John Laughlin on Jun 10, 2014
Latest reply on Jun 11, 2014 by Jared Conway

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Hello SolidWorks Community!

So I am attempting to save the deformed results of a simulation, in which I'm denting a steel 8in pipe segment for further simulations. I have been following the very helpful instructions from the following web page:

http://www.javelin-tech.com/blog/2011/05/using-deformed-fea-model/

The result successfully saves as a new file, but the deformed body is significantly different than the original simulation body and has invalid geometry (the denting body overlaps into the pipe wall).

The webpage lists a few possible solutions:

For the last 2 outcomes, you will need to go back to the model, and simplify the bodies if possible (get rid of unwanted tiny features and details). Also check if finer mesh is utilized on important details, and where it will deform the most in the model.

The bodies are as simple as I can make them, and the mesh, I believe, is as fine as I can make it. Any tips on how I can get a better saved deformed body?

Thanks a Bundle!

Here are some screenshots of my issue:

Jared Conway Jun 11, 2014 1:44 AM

Correct Answer

denter replaced with a force, just pick any number for now, just suggesting ways to isolate where the problem is coming from

the software is working because your test case works

so now you look at the difference between your test case and your problem, we see that its the contact from the denter. so either go with a force in your model, or put a denter in you beam example

the only thing somewhat "expected" is that your denter isn't in the deformed location. i think we only export the deformations, so since the denter doesn't deform it just moves, it looks wrong but i think may in fact be right

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Jared Conway Jun 10, 2014 2:06 PM

version/service pack?

have you already checked a very simple part like a cantilever beam to make sure it works the way you expect?

instead of the denter part, have you tried a force just to see if ti is the contact that is causing the issue?

i also assume there are no errors when you run the analysis and you aren't using soft springs or any other features to get the analysis to run

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John Laughlin @ Jared Conway on Jun 10, 2014 3:01 PM

Oh my! 1st, thanks for such a quick response!

I am using SW 2013 Premium. The analysis ran fine, and you are correct in your assumptions.

I tried doing a simple cantilever beam test, and while the saved deformed body does have a similar bend as the simulation result, the bend is only slight.

That being said, it seems as though the deformation is exagerated in the color-coded result (note: I could totally be wrong). I came to this conclusion because the red color (at the end of the cantilever) corresponded to a 10mm displacement, and when I did a quick measurement of the saved deformed body, the 10mm displacement was accurate.

Knowing this, it is still strange to me that the saved deformed body from the dented pipe trial is so different, when I had specified the displacement.

I suppose I could replace the denter with a force, but would need some time to figure out how to do that (note: I'm quite the novice SW simulation user )

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Jared Conway @ John Laughlin on Jun 11, 2014 1:44 AM

denter replaced with a force, just pick any number for now, just suggesting ways to isolate where the problem is coming from

the software is working because your test case works

so now you look at the difference between your test case and your problem, we see that its the contact from the denter. so either go with a force in your model, or put a denter in you beam example

Actions

John Laughlin @ Jared Conway on Jun 11, 2014 11:18 AM

I did a couple more simulations with varying displacements, and while the saved deformed body is not quite deformed to the extent that I was expecting (given the displacement values and color-coded model), I can still varry the depth of the dent to my liking, and the pipe cross-section deforms as I was expecting. For the time being, this is sufficient to run my other simulations.

Thanks a bundle Jared Conway!

Note: Be warry Solidworkers that the color coded stress, displacement, etc. models are great for visualization of those properties, but can be missleading when saving the deformed bodies.

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Jared Conway @ John Laughlin on Jun 11, 2014 4:51 PM

Note: Be warry Solidworkers that the color coded stress, displacement, etc. models are great for visualization of those properties, but can be missleading when saving the deformed bodies.

you can plot 1:1 and without the colors on it. that should match what you get from a deformed export

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5 Replies

Jared Conway Jun 10, 2014 2:06 PM
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Correct Answer
version/service pack?
have you already checked a very simple part like a cantilever beam to make sure it works the way you expect?
instead of the denter part, have you tried a force just to see if ti is the contact that is causing the issue?
i also assume there are no errors when you run the analysis and you aren't using soft springs or any other features to get the analysis to run
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- John Laughlin @ Jared Conway on Jun 10, 2014 3:01 PM
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  Correct Answer
  Oh my! 1st, thanks for such a quick response!
  
  I am using SW 2013 Premium. The analysis ran fine, and you are correct in your assumptions.
  
  I tried doing a simple cantilever beam test, and while the saved deformed body does have a similar bend as the simulation result, the bend is only slight.
  
  That being said, it seems as though the deformation is exagerated in the color-coded result (note: I could totally be wrong). I came to this conclusion because the red color (at the end of the cantilever) corresponded to a 10mm displacement, and when I did a quick measurement of the saved deformed body, the 10mm displacement was accurate.
  
  Knowing this, it is still strange to me that the saved deformed body from the dented pipe trial is so different, when I had specified the displacement.
  
  I suppose I could replace the denter with a force, but would need some time to figure out how to do that (note: I'm quite the novice SW simulation user )
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  - Jared Conway @ John Laughlin on Jun 11, 2014 1:44 AM
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    Correct Answer
    denter replaced with a force, just pick any number for now, just suggesting ways to isolate where the problem is coming from
    the software is working because your test case works
    so now you look at the difference between your test case and your problem, we see that its the contact from the denter. so either go with a force in your model, or put a denter in you beam example
    the only thing somewhat "expected" is that your denter isn't in the deformed location. i think we only export the deformations, so since the denter doesn't deform it just moves, it looks wrong but i think may in fact be right
    Like • Show 0 Likes0
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    - John Laughlin @ Jared Conway on Jun 11, 2014 11:18 AM
      Mark Correct
      Correct Answer
      I did a couple more simulations with varying displacements, and while the saved deformed body is not quite deformed to the extent that I was expecting (given the displacement values and color-coded model), I can still varry the depth of the dent to my liking, and the pipe cross-section deforms as I was expecting. For the time being, this is sufficient to run my other simulations.
      
      Thanks a bundle Jared Conway!
      
      Note: Be warry Solidworkers that the color coded stress, displacement, etc. models are great for visualization of those properties, but can be missleading when saving the deformed bodies.
      Like • Show 0 Likes0
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      - Jared Conway @ John Laughlin on Jun 11, 2014 4:51 PM
        Mark Correct
        Correct Answer
        Note: Be warry Solidworkers that the color coded stress, displacement, etc. models are great for visualization of those properties, but can be missleading when saving the deformed bodies.
        
        you can plot 1:1 and without the colors on it. that should match what you get from a deformed export
        Like • Show 0 Likes0
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Invalid Geometry in the file created from saving deformed simulation results

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