Getting 0 stress from a 1D model beam

Achmad Zufar
Achmad Zufar New Altair Community Member
edited February 2021 in Community Q&A

Hi Everyone, 

I'm doing FEA for a simple cantilever beam with a circular cross section and a tip load. I did a 1D mesh with a PBAR property. I got through the analysis part with OptiStruct, the displacement I got was okay but the thing is when I analyze the 1D stress somehow it turned out to be 0. How could this happen and how do I generate the stress?

Feel free to check out my model as I attach it to this question. Looking forward for your reply all!

 

Thanks!

 

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Answers

  • Adriano Koga_20259
    Adriano Koga_20259 New Altair Community Member
    edited February 2021

    If you are using PBAR/PBEAM property, you need to specify stress calculation points in your section (points C,D,E,F...).

    If it is a standard section (circular, rectangular, omega, ..) i'd recommend you to use the property PBARL/PBEAML instead, as it automatically outputs stress at these section points.Otherwise, you will need to add a continuation line to your PBAR and define the stress points manually.

    image

     

    From PBARL/PBEAML documentation

    image

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