Open AccessA fast forward solution with a boundary element method for eddy current nondestructive testing
Author(s) -
Friedrich Uhlmann,
O. Michelsson
Publication year - 2002
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee0202205u
Subject(s) - eddy current , quasistatic process , computation , boundary element method , eddy current testing , nondestructive testing , boundary (topology) , field (mathematics) , electromagnetic field , magnetic field , boundary value problem , magnetostatics , finite element method , constant (computer programming) , mechanics , physics , mathematical analysis , computer science , mathematics , engineering , structural engineering , algorithm , quantum mechanics , pure mathematics , programming language
Eddy current non-destructive testing is used to determine position and size of cracks or other defects in conducting materials. The presence of a crack normal to the excited eddy currents distorts the magnetic field; so for the identification of defects a very accurate and fast 3D-computation of the magnetic field is necessary. A computation scheme for 3D quasistatic electromagnetic fields by means of the Boundary Element Method is presented. Although the use of constant field approximations on boundary elements is the easiest way, it often provides an insufficient accuracy. This can be overcome by higher order approximation schemes. The numerical results are compared against some analytically solvable arrangements.