ELECTROMAGNETIC METHODS OF DEFECT DETECTION

This paper serves as an introduction to the topic of detecting and characterizing defects in materials nondestructively by electromagnetic methods. All such methods rely for their operation on the interaction of an electromagnetic field with the structure under test and can thus be classified as elliptic, parabolic or hyperbolic depending upon the governing partial differential equation type describing the underlying physics. This classification has particular significance for modeling studies based on finite element or boundary integral analysis and also affects the solutions of the corresponding inverse or defect characterization problem. © 1990 IEEE