Inventor General Discussion

Inventor General Discussion

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Distinguished Contributor
Mustang69
Posts: 130
Registered: ‎06-26-2006
Message 1 of 6 (240 Views)

Stress calculation Inventor 2010

240 Views, 5 Replies
01-22-2010 01:38 AM
Hi

I have a problem when calculating thinn sheet metal designs.
It seams there is a problem with the meshing but I cant solve it

The part i am working on now has 1,25mm thick material and when I run a simulation I emidiately get an error for the meshing.
se attached picture.

This example has a bend applied but i get this error message even on flat sheets

How do i solve this problem?
Distinguished Contributor
wayz
Posts: 229
Registered: ‎01-24-2006
Message 2 of 6 (240 Views)

Re: Stress calculation Inventor 2010

01-22-2010 04:03 AM in reply to: Mustang69
Much Easier if you post the actual file
*Expert Elite*
swalton
Posts: 1,307
Registered: ‎06-19-2006
Message 3 of 6 (240 Views)

Re: Stress calculation Inventor 2010

01-22-2010 07:47 AM in reply to: Mustang69
The issue is that your part is very thin compared to its length and width. Try to refine your element size so that you can have several elements across the minimum dimension of your part.

The FEA in IV2010 does not have 2d plane elements which would be a better choice for large sheetmetal parts. You may have to look into a standalone package to get the results you want.



Inventor 2014
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BMiller63
Posts: 2,533
Registered: ‎01-28-2009
Message 4 of 6 (240 Views)

Re: Stress calculation Inventor 2010

01-22-2010 09:11 AM in reply to: Mustang69
If I'm not mistaken you can use the Local Mesh Control in 2010 to manually mesh certain faces where needed.

Also I think in the past I've found that unchecking the setting for small geometry features helped with this, but I'm going from memory.

Either way I'd check the mesh settings and adjust as needed.
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BMiller63
Posts: 2,533
Registered: ‎01-28-2009
Message 5 of 6 (240 Views)

Re: Stress calculation Inventor 2010

01-22-2010 09:17 AM in reply to: Mustang69
also, it looks like you may be running the FEA on the assembly. If so there is an option to mesh based on the part dims rather than the assembly dims that may be helpful. I think that's in the mesh settings too.
Contributor
veikko.holvio
Posts: 12
Registered: ‎10-06-2008
Message 6 of 6 (240 Views)

Re: Stress calculation Inventor 2010

02-01-2010 05:16 AM in reply to: Mustang69
Hi,

does anyone know what is the maximum allowed element distortion (element maximum dimension / minimum dimension) in 2010? This applies to thin-walled part where you get the error message like Mustang69 relatively easily. I know this element type is not actually meant for thin-wall analysis, but it is the only one included...

Veikko
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