18 Replies Latest reply on Apr 29, 2015 5:31 PM by Jared Conway

    How does "no penetration" really work in SW?

    James Riddell

      I have an over-hung bar with two rollers on top and two offset to the right on the bottom.  All four rollers are set to 'no penetration' with the bar, respectively.  However, when I run the FEA with a load on the left-most roller in a downward direction I don't see equal and opposite forces among the contact sets.  I *should* see a downward force on the top left, downward on the top right, upward on the bottom left and zero on the bottom right (like the crude sketch below).

       

          o           o

      -----------------------

                  o             o

       

      Instead I am seeing an upward force from the bottom right roller and zero on the bottom left.  Also, the forces don't balance.