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Iterative loading till failure

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  • Iterative loading till failure

    Hi all,

    I wish to ask whether it is possible with RFEM to somehow automatically increase the load from an initial value till a steel member reaches first plasticity, and finally full plastic failure. This I've seen done in certain FEM packages but am unsure if possible here. I have seen the possibility of something similar in the load case menu, but it was only available for non-linear materials.

    Thank you and best regards.

  • #2
    Hello, yes, this is possible. The option for this can be found in the settings of the load cases or load combinations:

    LoadSettings

    Frank Faulstich
    Support Team der
    Dlubal Software GmbH
    info@dlubal.com
    https://www.dlubal.com

    Kommentar


    • #3
      Hi there! Thank you very much for your answer, I have managed to follow your instructions and carry out the testing. However I have another question now if possible.

      I have selected iterative loading on a custom steel section to determine the behaviour at different loading scenarios, however the results are a bit skewed because the material (Steel fy = 275N/mm^2) continues to increase in stress resistance up to 1000N/mm^2. I am not sure if I am missing something but at such high stresses, the material will fail. I wished to observe how the section enters plasticity and the stresses get redistributed till all of the section is acting plastically. Is there a check I can turn on to stop the material from resisting such high stresses, and therefore get a more accurate scenario?

      I am aware that I may be getting lost in the complexities. Thanks in advance.

      Kommentar


      • #4
        Hello! I suspect that you are using elastic material instead of plastic material in your model.

        You can enable plastic material behavior here:

        Isotrop Plastic Material
        Isotrop Plastic Material

        Frank Faulstich
        Support Team der
        Dlubal Software GmbH
        info@dlubal.com
        https://www.dlubal.com

        Kommentar

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