Hi Georgios,

Please check the following items:

  • Check the contact between the gasket and the diamond. From the picture, it appears that a small interference is present in the results.
  • Reduce the mesh size, particularly for the gasket. Capturing the bulge may require a finer mesh.
  • Make sure proper boundary conditions are applied to the gasket, specifically for the free end of the gasket that may influence the resulting deformation field.