Stress Contour Over Range Color

Stress Contour Over Range Color

kseminsky
Enthusiast Enthusiast
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Message 1 of 18

Stress Contour Over Range Color

kseminsky
Enthusiast
Enthusiast

When changing the range of my stress plot contour (specify min/max), values that go over the max value sometimes appear green. Some times white. I am curious if there is a way to define this color as to always be white? Attached are some examples of what I mean. This is the same model, same solution, just different plot specifications. You'll notice it is white in one view, and green in another. Not sure why this is? 

 

Greatly appreciate the help!

 

 

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17 Replies
Replies (17)
Message 2 of 18

jbm
Contributor
Contributor

Did you ever find an answer for this?

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Message 3 of 18

kseminsky
Enthusiast
Enthusiast

No. I usually play with the settings until it changes to white, then print my plots. A minor inconvenience, but I have been working around it (or ignoring it). I just upgraded to 2019, but have not had much of a chance to mess with plots yet. Will advise if the problem continues. Thanks for checking in. 

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Message 4 of 18

kseminsky
Enthusiast
Enthusiast

This is still an issue in 2019 for me. Occurs on my solid models and plate models, and it is random when the program wants the over-range values to be white or green (or so it seems). I am not sure why it does this, but I can usually get it to change to white if I fiddle with it enough. 

 

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Message 5 of 18

Anonymous
Not applicable

I am using 2020 version now but the problem is still there. Is this issue will be resolved in neartime?

I have attached the images for comparison after changing max limit. I cant use such plot, as it shows green color at max stress.

 

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Message 6 of 18

John_Holtz
Autodesk Support
Autodesk Support

Hi everyone ( @Anonymous , @kseminsky , @jbm )

 

The color used when the result is above the range appears to be either green or gray/white depending on which default contour is used. In a linear static stress analysis, this is what I see:

  • "Deformed" contour: results above the "Data Max" value are shown as green.
  • "Von Mises" contour: shown as gray/white.
  • "Displacement" contour: shown as gray/white.
  • "Safety Factor" contour: shown as gray/white.
  • New contour: shown as gray/white.

I notice that if the minimum value is less than the "Data Min" value, the color is still shown as blue, not green, not gray/white, not some other color. See the image below.

 

So these are the important questions:

  1. When the result value is greater than the contour "Data Max", what color should be shown on the model?
    1. Red? (or the color at the top of the legend)
    2. gray/white?
    3. Some other color?
  2. When the result value is less than the contour "Data Min", what color should be shown on the model?
    1. Blue? (or the color at the bottom of the legend)
    2. gray/white?
    3. Some other color?

(Personally, I prefer to use the same color as the legend regardless of whether the result is outside the range or not.)

What color to use when out of range?What color to use when out of range?

Figure 1: What color to use when the result is out of range?

The results at (1) are less than the minimum value (A). Should the color be blue or something else?

The results at (2) are greater than the maximum value (B). Should the color be red or something else?

 

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided, indicate the version of Inventor Nastran you are using.
If the issue is related to a model, attach the model! See What files to provide when the model is needed.
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Message 7 of 18

kseminsky
Enthusiast
Enthusiast

John, Thank you for looking further into this. In my opinion, any value that is "off the chart", should be represented by a color that is "off the chart". So, when exceeding either lower and upper bounds, I feel the color should be white/gray (or some color that is not on the chart). It would be up to the FEA operator to expand the values of the contour bounds to provide color to the part under analysis. 

On the other hand, I have had some customers where they preferred RED to indicate failure or over allowable. This requires a bit of manipulating the fringe plot options such that level 7 (out of an 8 fringe plot) is the limit. Then, in that case, you'd want RED to go to infinite value (or blue, if going the other way).  

If I may dream!....  How about a selectable radio button to make over/under limit white or remain red/blue!? I am no programmer, I am not sure the difficulty of such an option. I am sure any fix will be an improvement over what exists now. Thanks!!

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Message 8 of 18

John_Holtz
Autodesk Support
Autodesk Support

Hi @kseminsky 

 

Your suggestion for a radio button to choose whether to show a gray/white color or the normal red/blue color when the result is outside the range of the legend is exactly what the developers suggest. Great idea!

 

I submitted a formal change request. Now we just need to give those guys the time to make the change.

 

make it so.png

 



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided, indicate the version of Inventor Nastran you are using.
If the issue is related to a model, attach the model! See What files to provide when the model is needed.
Message 9 of 18

Anonymous
Not applicable

@John_Holtz wrote:

Hi everyone ( @Anonymous , @kseminsky , @jbm )

 

The color used when the result is above the range appears to be either green or gray/white depending on which default contour is used. In a linear static stress analysis, this is what I see:

  • "Deformed" contour: results above the "Data Max" value are shown as green.
  • "Von Mises" contour: shown as gray/white.

 

Hi John,

 

it's not so easy, as you describe. The over range color depends on the rendering type and not limited to white and green. There is also some kind of random function in it, so it is not reproducible.

 

In "Continuous" and "Gouraud" mode the over range colors are always the start and end colors of the bar (red/blue). In "Fringe" mode the color below min is always the color of the min value, normally blue, or red with flipped range. The color above max can change randomly when you edit the number of levels. But even with the same umber of levels there can be different colors, depending what level numbers you tried before (compare the last two samples). I guess this is simply a bug.

 

191018-RandomColor.png

 

With "Line" mode or using "Iso-Surfaces" there is no over range color. The over range area is left blank (transparent).

 


@John_Holtz wrote:

Figure 1: What color to use when the result is out of range?

The results at (1) are less than the minimum value (A). Should the color be blue or something else?

The results at (2) are greater than the maximum value (B). Should the color be red or something else?


 

I personally prefer the max and min colors for the over range colors, like it is in "Continous" and "Gouraud" mode (Inventor's Stress Analysis does it the same way). But I prefer "Fringe" mode in general. On the other hand it often is helpful to see just a small range of the result spectrum and have the rest of the model transparent like it is in "Line" mode or with "Iso-Surfaces". But here I miss the deformed shape of the mesh. And yes, I can understand the some users like to have separate colors for the over range areas.

 

So the best would be to have options for the over range colors like this proposal:

 

191018-Dialog-New-Contour-Colors.png

 

There is a checkmark to select if the over range area is colored or left blank (transparent) an a button to chose the color, if the checkmark is selected. The default should be colored with the colors of the min and max colors of the color bar.

 

The results could be like this:

 

191018-Continous-Max-Override-Red.png

 

191018-Fringe-Max-Override-Gray.png

 

191018-Fringe-Min-Override.png

 

191018-Fringe-Min-Override-woColor.png

 

I faked the last one with iso surfaces, but it should look similar in fringed or continuous mode. Comparing the last two pictures, you see the benefit of the transparent option, when searching e.g. for high stresses in a more complex model.

 

Message 10 of 18

ken.friesen
Contributor
Contributor

What's really needed is ISO clipping. @John_Holtz is this anywhere near implementation? Iso clipping (like in Fusion 360) - Autodesk Community

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Message 11 of 18

ncbCVDP2
Participant
Participant

Hi @John_Holtz 

 

What is the status on this feature? I'm using 2022 and I just missed issues in my design with exceeding compressive stress levels for over a week because I assumed that stresses below the user specified minimum limit would show up as grey just like the ones above the max limit do 😞 I really don't understand why anyone would generally treat the lower bound different from the upper bound except maybe for von Mises or principal strains/stresses...

 

Best regards

Nicolai

Message 12 of 18

c.neumannFNXXR
Observer
Observer

Hi @John_Holtz 

 

Just reffering to the last reply. Are there any updates to this topic? 

 

Best regards

Christian

Message 13 of 18

John_Holtz
Autodesk Support
Autodesk Support

There are no updates on this issue.

 

John



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided, indicate the version of Inventor Nastran you are using.
If the issue is related to a model, attach the model! See What files to provide when the model is needed.
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Message 14 of 18

NINCAD2024Desktop1SU-SIM
Community Visitor
Community Visitor
Hello Michael,

Can you share your model shown in the image such that we can make sure that it is same when implementation is done as you suggested? If it is not a confidential/customer model.

Thanks!
Mahaboob
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Message 15 of 18

Is there already any news on this topic? For us, since 2024, the fringe option no longer appears at all. Is this an installation bug or has this option been completely removed?

 

fringe with the option to show all areas outside the limits as transparent would be a huge benefit to inventor nastran

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Message 16 of 18

John_Holtz
Autodesk Support
Autodesk Support

Hi @gregor_hoeferB4DLM 

 

The Fringe option still exists and works for me. Can you provide some screen captures to show what you see (or don't see)? Is the issue related to the type of elements in your model? 

 

Inventor Nastran 2024.2 has the upgrade to set the colors used for the out-of-range values. See the Release Notes for more details.

 

John



John Holtz, P.E.

Global Product Support
Autodesk, Inc.


If not provided, indicate the version of Inventor Nastran you are using.
If the issue is related to a model, attach the model! See What files to provide when the model is needed.
Message 17 of 18

gregor_hoeferB4DLM
Explorer
Explorer

Hi @John_Holtz, thank you very much for the quick response. I tried it in 2022 and 2024, both times no entry from Fringe. Maybe it's because the installation is in German? I tried solid and shell. Its the same.

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Message 18 of 18

gregor_hoeferB4DLM
Explorer
Explorer

tried install english 2024.2 -> there is fringe (screenshot)

 

in german 2024.2 it is named "stufig" what means stepwise

 

so the iso-clipping "fringe" is not continius. thats ok. it works

 

by the way: great would be an option of transparent (like iso-surface).

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