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ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 1 of 18 (307 Views)
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Cannot run stress analysis

307 Views, 17 Replies
01-25-2014 05:48 PM

Hello,

 

I have a less complex version of this file and it runs just fine, however, this more complex geometry will not work.

Essentially it is 4 0.25mm thick layers of a honey comb lattice that have been slightly offset to provide strength and buckling resistance. I want to run a stress analysis to see if this more complex model is stronger than the less complex.

 

I can click on the faces, vertices, and edges of the model as usual, but when I try to add a constraint or a force, it will not highlight/let me click on the model

 

What should I do? Is there a way to fix my model and get it working?

 

*Expert Elite*
JDMather
Posts: 26,301
Registered: ‎04-20-2006
Message 2 of 18 (282 Views)

Re: Cannot run stress analysis

01-26-2014 04:03 AM in reply to: ian.j.wilkins

No file attached.

Find the red End of Part marker in the browser.
(End of Folded on sheet metal parts EOF)
Drag the red EOP to the top of the browser hiding all features.

Save the file with the EOP in a rolled up state.

Right click on the file name and select Send to Compressed (zipped) Folder.

Attach the resulting *.zip file here.

 

Try using IE to attach if you are using some other browser.

Please mark this response as "Accept as Solution" if it answers your question.
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Contributor
ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 3 of 18 (269 Views)

Re: Cannot run stress analysis

01-26-2014 09:58 AM in reply to: JDMather

I did not realize you could upload zipped folders. I tried to upload the STEP, STL, and ITP files, but did not have any luck. Now that I know you can upload a zipper folder, would you like me to send you all of the files listed above?

Contributor
ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 4 of 18 (264 Views)

Re: Cannot run stress analysis

01-26-2014 10:42 AM in reply to: JDMather

Here are all the files I have. They are the same file, but in different formats.

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JDMather
Posts: 26,301
Registered: ‎04-20-2006
Message 5 of 18 (260 Views)

Re: Cannot run stress analysis

01-26-2014 10:54 AM in reply to: ian.j.wilkins

ian.j.wilkins wrote:

I can click on the faces, vertices, and edges of the model as usual, but when I try to add a constraint or a force, it will not highlight/let me click on the model


I am interested in ONLY the Inventor part or assembly that exhibits this behavior.

 

1. Have you rebooted the computer and the problem persists?

2. What is your current selection filter priority set to?

 

3. You posted several neutral format files - do you have a valid solid body in Inventor?

4. Why are your planar faces comprised of faceted triangles.

5. Where are you getting the geometry - is it created in Inventor or some other program?

Please mark this response as "Accept as Solution" if it answers your question.
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Contributor
ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 6 of 18 (258 Views)

Re: Cannot run stress analysis

01-26-2014 10:57 AM in reply to: JDMather

What I am currently doing works with a much less complex version of this model. So I do not know if this complex version is a valid solid body. Is there a way to fix it so that it is a valid solid body?

 

*Expert Elite*
JDMather
Posts: 26,301
Registered: ‎04-20-2006
Message 7 of 18 (253 Views)

Re: Cannot run stress analysis

01-26-2014 11:01 AM in reply to: ian.j.wilkins

I added additional questions above.

 

This is trivial simple planar geometry - not complex geometry.  The question is - where is the Inventor geometry?

The question is, why is it faceted?

 

(my guess, given no Inventor geometry - you are using stl for some unstated reason)

Please mark this response as "Accept as Solution" if it answers your question.
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Autodesk Inventor 2014 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015 64-bit
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http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm
Contributor
ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 8 of 18 (248 Views)

Re: Cannot run stress analysis

01-26-2014 11:07 AM in reply to: JDMather

I did not make these files in inventor, I made them in Maya. Using maya I converted them to STL files, the ran those STL files in Rhino to convert polygonl meshes to NURBS. Then I converted the NURBS to a STEP file, and finally imported that into inventor. I do not have any experience designing in inventor, I only have experience with maya. However, A much simplier version of this file has worked in inventor using the method I described above. I have no idea why this file is not working, considering I used the exact same process, and am now getting different results.

 

Why is this happening?

Is there a way to fix it?

 

If there a more direct way to get Maya files into inventor?

*Expert Elite*
JDMather
Posts: 26,301
Registered: ‎04-20-2006
Message 9 of 18 (244 Views)

Re: Cannot run stress analysis

01-26-2014 11:13 AM in reply to: ian.j.wilkins

1. You still haven't attached your *.ipt file.

 

2. I haven't used Maya - but check what filetypes Maya can save (not stl - stl is faceted surfaces - of no use) STEP, IGES or DWG or DXF or ACIS out of Maya would be best.

 

3. This part would be fairly simple to recreate from scratch as native Inventor geometry - you should have supplied all of the above information in the original post.

Please mark this response as "Accept as Solution" if it answers your question.
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Autodesk Inventor 2014 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015 64-bit
http://www.autodesk.com/edcommunity
http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm
Contributor
ian.j.wilkins
Posts: 18
Registered: ‎01-25-2014
Message 10 of 18 (239 Views)

Re: Cannot run stress analysis

01-26-2014 12:12 PM in reply to: JDMather

Here is an updated zip folder. This one has the ITP file in it.

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