General Mechanical

General Mechanical

Geometric Nonlinearity

    • ravi123rkj
      Subscriber

      Hi,


      I am doing the buckling analysis of stepped column. I want to perform non linear analysis but I don't know which strain equation ansys is using when I use geometric non linearity by turning large deflection on.


      Thanks

    • peteroznewman
      Subscriber

      If you are asking about solid elements, the strain equation doesn't change when large deflection is turned on.  The nodes are updated to the displaced location, a new stiffness matrix is computed and a new force imbalance is computed. This process is iterated until the force imbalance is below the convergence criterion.

    • ravi123rkj
      Subscriber
      Hi Thanks for reply.
      From where can I see that what type of strain equation ansys is using?
      Thanks
    • Mike Rife
      Ansys Employee

      ravi123rkj - please see the following help section:


      ANSYS Help -> Mechanical APDL -> Theory Reference chapters 2 "Structures" and 3 "Structures with Geometric Nonlinearalities".


      I think you are asking about the small strain definition versus Hencky strain.


       


      Mike

    • ravi123rkj
      Subscriber

      Hi Mike sir,


      I have searched that on Ansys help but could not found anything of that sort. Can you please upload this with some screenshots so that I can see where can I found this.


      Thanks

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