13 Replies Latest reply on May 23, 2018 3:15 PM by Vladimir Urazhdin

    Why am I getting stress concentrations at ends of flat interface

    Bill Clark

      Can someone tell me what I am doing wrong?  I am doing a non-linear axis symetric 2d simplification of a pipe being pressed into the bottom of a hole.  Global contacts are no penetration. The pipe has a 45 degree chamfer around the end and this chamfer is mating up with a matched 45 degree counter sink at the bottom of the hole.  The block with the hole is fixed and the pipe receives a load pushing it into the bottom of the hole. After I run the study, I don't get even contact pressure across the face of the pipe.  The plot shows a concentration of force at each end of the face where the chamfer ends. (pipe comes in from the right, countersunk hole on the left)

       

      Pipe Contact mesh.PNG

       

      Pipe Contact Stress.PNG

       

      Pipe Contact pressure.PNG

       

      Pipe Contact plot.PNG