FINITE-ELEMENT MODELING OF PULSED EDDY CURRENTS FOR NONDESTRUCTIVE TESTING

The pulsed eddy current technique is widely used to detect flaws in co nducting plates. Time transient data from the system can be used to pr oduce a frequency response which enables a user to detect the presence of defects. This paper is concerned with modeling this technique usin g 3D finite elements. Data from the time transient finite element mode l is used to produce a frequency response, this is compared to values from an experimental test rig. A method of analyzing the response sign al in real time is also discussed. This allows a fast method of detect ing and quantifying defects in conducting structures.