@bobsik641, @cxquan, nI had one of the simplest models you can imagine, a tube rotating on its axis at a constant velocity. The hourglass energy built up to a huge value and began eroding the elements!n

The material is BRASS from the Explicit Dynamics category of Engineering Data. A solid tube has an initial condition of an Angular Velocity of -36.65 rad/sec Remote Displacement ramps a rotation of -1800 degrees in 0.856 s the math on the angular velocity and the remote displacement, they both come out to be 350 rpm. expect to see a simulation where the solid tube has an uneventful time rotating. Instead the tube erodes away. I understand there will be some stress from the small amount of centripetal force and some Poisson ratio effect, but I didn't expect

is wrong with this model? I know that @MAMIN219 wants to know the answer to this question.

Does your model have a Remote Displacement or a Revolute Joint? Both of those caused the problem.nThe workaround was to use a Cylindrical Coordinate System and rotate the tube on its axis using Displacement of the theta DOF in the cylindrical coordinate system.n