Development of a Finite-Element Model for Eddy-Current NDT Phenomena. Interim Report

摘要

One major factor which has limited progress towards development of a viable defect characterization scheme for eddy current testing has been the lack of a general mathematical model capable of predicting the complex electromagnetic field/defect interactions in the part under test. Objective of this research project has been to determine the feasibility of applying finite element numerical techniques to the problem of modeling eddy current NDT phenomena. Results of finite element studies are given in this report for numerous eddy current testing geometries including coils and conductors above conducting planes for which analytical results exist and, complex steam generator tubing problems which to date have not been solved analytically. A comparison of the finite element results with experimental data (and analytical data if available) clearly shows the feasibility of applying this numerical analysis approach to the solution of eddy current nondestructive testing problems. (ERA citation 07:004943)