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Pretensioning of a cable and then apply dead load: rigid body motion, model unconstrained

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    • September 2, 2021 at 1:23 pm
      dom
      Subscriber

      Hi everyone,

      hope someone will help me beacause it's weeks since I'm trying to solve this problem without any sucsess and I'm quite frustrated. I would like to simulate this process using LINK180 elements:

      image.png
    • October 4, 2021 at 6:23 pm
      Sheldon Imaoka
      Ansys Employee

      Tension-only cable elements (LINK180) have no stiffness in bending - a bending stiffness can only arise from stress-stiffening term, if the element is in a state of tension. In your script, I think you apply the preloads but leave /SOLU (solution processor) then re-enter, which causes the solution to fail since you lost the preload.
      You should turn on large deflection effects (NLGEOM,ON) from the start - don't leave /SOLU (if you do, you need to 'restart' the analysis) when you apply the dead load. You do need to keep any boundary conditions to maintain the preload.
      Regards Sheldon

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