topic Re: Instability type 3 in Robot Structural Analysis Forum

Instability type 3

Anonymous — Wed, 08 Aug 2018 02:30:54 GMT

I am unable to fix the instability type 3 error I get within the attached model. Any assistance would be greatly appreciated.

Thanks,

Tim

Re: Instability type 3

saclovitzky — Wed, 08 Aug 2018 09:20:30 GMT

You can ignore it(but not for Type 1&2).

Re: Instability type 3

Artur.Kosakowski — Wed, 08 Aug 2018 09:26:41 GMT

Hi @Anonymous

All you need are better meshes. I'm attaching the model with denser ones.

If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

Re: Instability type 3

Anonymous — Wed, 08 Aug 2018 14:50:00 GMT

When I ran the analysis/calculations on the new model it still had an instable node and another error for the cohesion of the model?

Re: Instability type 3

Artur.Kosakowski — Wed, 08 Aug 2018 14:56:46 GMT

Hi @Anonymous

Try to apply this settings

If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

Re: Instability type 3

Anonymous — Fri, 10 Aug 2018 12:20:15 GMT

@Artur.Kosakowski,

Is there a reason why the shell stresses are not computing or are very minimal? I would expect higher shell stresses with the uniform loads applied. Separately, is there a shell buckling failure analysis? Model attached.