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No stresses in .mnf created from H3D

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I'm using HW8SR1 for converting H3D in to MNF be used with ADAMS/FLEX.

H3D file is generated using .fem of optistruct and with stress recovery option 'ON'.

flex-H3d also shows the relative stress / strain information when opened in Hyperworks. But when converted to .mnf (using HYPERVIEW --> FlexTools --> FlexPrep) , the file doesn't carry the stress information.

Is it the standard problem? If yes what is workaround.

If no, does it require any parameter setting ?

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Hi, I'm Keshav replying here.Can you please share the h3d file with me? Please mail mvsupport@altair.com with the h3d file. I'll take a look at the file and will get back to you. Thanks.

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Hi,

I also face the same problem, could you share the information here instead of PM? That the use of forum right?to share information and discussing problem.

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I'm using HW8SR1 for converting H3D in to MNF be used with ADAMS/FLEX.

H3D file is generated using .fem of optistruct and with stress recovery option 'ON'.

flex-H3d also shows the relative stress / strain information when opened in Hyperworks. But when converted to .mnf (using HYPERVIEW --> FlexTools --> FlexPrep) , the file doesn't carry the stress information.

Is it the standard problem? If yes what is workaround.

If no, does it require any parameter setting ?

as i know you need grid point stress values for mnf creation, you must put the card gpstress in your fem file and solve it again:

GPSTRESS(ALL) = ALL

element stress/strain values could be used for fatigue analyses

here is a small bat file which you could edit and use for your files:

set FLEX=C:\Altairwin64\hw10.0\io\translators\bin\win64

%FLEX%\flexprep your_file.fem your_file.h3d CB +node+node+node+... nm -STRESS -FEMONLY -PURGE -MEGAGRAM -MILLIMETER -NEWTON -SECOND

definition:

set FLEX=C:\Altairwin64\hw10.0\io\translators\bin\win64 sets the path of flex_prep utility

CB means usage of craig-bempton

+node+node+node+... means your interface nodes

at the end of the interface nodes there is a value nm (you could change it) it means number of modes

and the last part is easy to understand :)

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Hi Hexagon,

That was a great response. I learned a lot, thank you!

I recently started using MotionView 11 (SA-101) and I don't have these problems, so I guess the Altair folks must have resolved the issues..

Syairasm & BSG,

Hi! I'm a newbie to this forum.. May I know for what applications do you simulate using Multi-Body Dynamics?

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