3D analytical models for geometry and vector transformations for defects analysis in NDT systems

The present work deals with the use of 3D analytical transformations in order to establish geometry and vector transformations models for eddy current problems in 3D nondestructive testing systems. The interest of such a transformation is the generation of electromagnetic field for cylindrical problem from only the field distribution known in simpler 3D (x-y-z) geometry. The transformation technique is applied to both geometry and electromagnetic field distribution for objects without defects and those containing an arbitrary volume defect. In order to obtain the validity for the field transformation a comparison with finite elements solution was carried out.