General Mechanical

General Mechanical

contact-penetration

    • Adisa
      Subscriber

      Hi,


      Does anyone know how to prevent this penetration.



      Yesterday on this blog I learnt about trim contact. But it does not solve this problem. The analysis  is converged but the penetration still exists.


       


      Best regards.

    • Sandeep Medikonda
      Ansys Employee

      Hi Adisa,


        Have you tried Normal Lagrange too? It looks like your mesh is quite coarse, can you try refining it? Some recommendations from other posts:


      recommendations 1


      recommendations 2


      recommendations 3


      ~Sandeep

    • peteroznewman
      Subscriber

       Adisa,


      You have to set the Shell Thickness Effect to Yes (assuming your geometry is a shell model).



      Best regards,


      Peter

    • Adisa
      Subscriber

      Sandeep and Peter thank, I did include shell effect. Now it is ok.


      Peter for what you use remote points? So far I have never used It in ANSYS

    • peteroznewman
      Subscriber

      Remote points are very useful when you need to allow rotational freedom at a face, while applying a displacement (zero or non-zero) to the center of the face. You can't do that with a Fixed Support or a Displacement BC.  Say you have a structure with a pinned connection to ground, so it has a rotational freedom, but you don't want to model the pin to allow rotation, you can use a Remote Point and leave that rotational DOF free, while setting the displacements to zero.


      Remote points are very useful in cantilevered structures when you want to cut away a length of the geometry that carries the load from the end where the force is applied to the critical area at the base, and you don't want to mesh that length, but you need to apply a force to the end.  It's possible to replace a force at the end with a force and a moment at the cut face, but it is simpler to create a remote point where the end used to be and just apply the force to the remote point and let the remote point create the correct moment on the cut face for you.


      Perhaps other members will offer more examples.


       

    • Sandeep Medikonda
      Ansys Employee

      Hi Adisa,


        To add to what Peter already said, since remote points define a specific point in space, multiple boundary conditions can be scoped to each. Also, this single remote association avoids over-constraint conditions that can occur when multiple remote loads are scoped to the same geometry. Lastly, they are also very useful when using constraint equations.


        Here is another interesting article.


      Regards,


      Sandeep

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