Modelling Assumptions
The major assumptions made by the EddyCentre models are:
- All materials are isotropic.
- The defect volume is completely contained in one region (does not cross
region boundaries).
- The region containing the defect is non-ferrous.
- For cylindrical geometries - the radius of curvature of the inspected surface
is assumed large compared to the radius of the probe.
- For cylindrical geometries - the extent of the defect around the circumference
of the work-piece is assumed small compared to the circumference.
The EddyCentre Lab tools will prevent you from violating these assumptions
and will give you appropriate error messages when you are designing your own
inspections . If you are interested in modelling ferrous materials you can approximate
the solution by assuming the material is locally magnetically saturated and
set the relative permeability of all materials to unity.
