Progress in Eddy Current Modeling via the Boundary Element Method

Modeling Eddy Current Crack Signals of Differential and Reflection Probes

“…An efficient approach to take advantage of the quasi-static condition is given by the Hertz potential method [1][2][3]. In non-conducting media such as air and ferrite-core materials, the method reduces to the scalar magnetic potential approach.…”

“…The efforts of past several years have resulted in development of an eddy current model [1][2][3][4][5][6][7][8], using the boundary element method (BEM). As of last year, the BEM algorithm based on the Hertz potential approach [1][2][3] was shown to be effective in dealing with complex part and probe geometry [4][5][6], and particularly in modeling crack signals [7][8][9].…”

“…As of last year, the BEM algorithm based on the Hertz potential approach [1][2][3] was shown to be effective in dealing with complex part and probe geometry [4][5][6], and particularly in modeling crack signals [7][8][9]. Previously, the modeling capabilities were demonstrated mostly with absolute probes.…”

“…To recapitulate our overall objective [1][2][3], our task is to develop the so-called "measurement models", i.e. theoretical models of probe-flaw interactions, applicable to existing and newly developed inspection systems.…”

Recent Developments of Eddy Current Inspection Simulator

“…In the first phase, the code has incorporated the half-space field and impedance computation of Dodd and Deeds [3], and the half-space crack code with both impedance and field computation capahililies [8]. In the next phase of the development, the code is planned to include more options and physics engines made available for integration.…”