General Mechanical

General Mechanical

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Initial imperfection

    • Luana
      Subscriber

      Dear Everybody,


       


      I use ansys workbench 19.1 and run an analysis for a truss. I applied constant force at the purlins. I also want to apply increasing  thermal condition, and observe the effect of the degradation of the Yield strength and Young's modulus. I use line elements edited in spaceclaim.



      As the first step, I need geometric initial imperfection, thus I wanted to connect my static structural-Eigenvalue buckling solution with a new static structural analysis, (because of  the lack of finite element modeler in newer versions)


      The analysis run without problem till the eigenvalue buckling.


       But I always get an error message, and can't make an operative contact between the calculations.



       


       


       

    • peteroznewman
      Subscriber

      In Workbench, right click on the Solution cell in the Eigenvalue Buckling analysis and Update.  Wait till the cell gets a green check mark.


      Then right click on the Model cell and Refresh.


      If you don't get a green check mark on Eigenvalue Buckling, then you have to open the first Model cell and investigate why in Mechanical.

    • Luana
      Subscriber

      Dear Peter,


      Thank you for your fast reply, it helped me a lot.


      I succeeded to continue with the nonlinear analysis, but new problems appeared. I've found this topic: "Modelling plastic deformation of a column", with the the same problem, and you gave  links in your comment on 29 March 2019. Unfortunately these links are no longer available, could you repost it here please?


       


      /forum/forums/topic/modelling-plastic-deformation-of-a-column/

    • peteroznewman
      Subscriber

      It seems ANSYS has gobbled up this site as it no longer exists.


      I found the pdf file here.

    • solomonendalew
      Subscriber
      the same problem I use ansys workbench 2021 R1 and run an non linear plastic static analysis for a SHS section column it's ok. but I have to Questionsn1) I want to connect Eigenvalue buckling solution to static model not active. n2) I want to add initial Imperfections in geometry but i can't do that.nnI appreciate anyone have advanced help to fix my problem. thank younn
    • Erik Kostson
      Ansys Employee

      Closing this post

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