Strange principal stress in postprocessing

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vpapanik
Posts: 46
Joined: Sat Oct 08, 2016 1:05 pm

Strange principal stress in postprocessing

Postby vpapanik » Tue Apr 14, 2020 9:50 pm

Hello ! I have found a strange result in postprocessing, specifically the principal stress calculation.

Here's my result table :

1.png
1.png (212.08 KiB) Viewed 1981 times


and here is a cross check using two different online calculators :

2.png
2.png (73.69 KiB) Viewed 1981 times


3.png
3.png (192.41 KiB) Viewed 1981 times


The tensile principal stress from GiD is 4801.2 and from both online calculators is 3209.7.
In my model, the checked element has not actually cracked which means that the principal stress should be lower than 4400.0. With the GiD result it should be cracked, but I think that 3209.7 is actually right.

I can't figure out what is happening so I would really appreciate any help.
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escolano
Posts: 1649
Joined: Thu Sep 18, 2014 3:31 pm

Re: Strange principal stress in postprocessing

Postby escolano » Thu Apr 16, 2020 12:56 pm

I think that this is a bug that I have detected and fixed for next 14.1.9d version,
but this version is not already publicly available for download, it will be soon...
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vpapanik
Posts: 46
Joined: Sat Oct 08, 2016 1:05 pm

Re: Strange principal stress in postprocessing

Postby vpapanik » Thu Apr 16, 2020 3:41 pm

Thanks a lot, looking forward. For the time being, I made custom principal stress results in .post.res.

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