General Mechanical

General Mechanical

No change between linear and nonlinear buckling load

    • Venugopalb
      Subscriber

      Hello all


      I have done the linear buckling analysis of an ellipsoidal dome in Ansys workbench and it gives the buckling load of 17.5 MPa. Then I added geometric imperfection of 0.1% and material non-linearity to the model. I ran the non-linear buckling analysis, the time factor linearly increasing, there are no cutbacks occur in the ARCLEN method. It means, it gives the same buckling load, what I got in the linear buckling analysis. I have attached some of the details of the model.


      After adding imperfections, it should buckle earlier than 17.5 MPa. but it is not. Why?

    • jj77
      Subscriber

      The load is about 11 MPa when this fails, just for your reference (make sure you use nonlinear materials - set that in the surface body properties in the tree structure, sure you know how to set that)

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