When using periodic conditions, you should ensure that your model satisfies the following 3 conditions:
- Active geometry does not overlap when it is rotated into position (Overlapping active geometry gives non-physical results).
- Segments with periodic boundary conditions do not contain elements. These boundary conditions define areas where the material is continuous into the next periodic segment.
- The center of the model is located at the origin in 2D or on an axis in 3D.