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Unwanted Node Movement in Abaqus

  1. Jul 9, 2015 #1
    Hi, I am brand new to these forums and fairly new to abaqus as well.

    I am doing a simple radial expansion on an axi-symmetric semicircle with a smaller semicircular hole in it. In order to do so, I created a datum CSYS that is cylindrical in nature but aligned with the global CSYS. In other words the R axis is the X axis and the T axis is the Y axis. After applying my displacement boundary condition to the inner semicircle to expand outward, I get the desired radial displacement, but I also get some varying motion of the nodes in the theta plane about 2 orders of magnitude lower than the radial displacement magnitude.

    Any idea on why that might be? My sides of the semicircle are constrained with a XSym boundary condition and my outer surface of the semicircle is encastred. Is this due to the compression of the elements? And if so, is it unavoidable? I wouldn't want to create another boundary condition preventing theta-plane displacement?

    I am uploading the input file as a .txt.
     

    Attached Files:

  2. jcsd
  3. Jul 14, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
     
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