Three dimensional hybrid finite-boundary element model for eddy current NDE

Author

Nath, S. ; Lord, W. ; Rudolphi, T.J.

Author_Institution

Iowa State Univ., Ames, IA, USA

Volume

29

Issue

2

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1853

Lastpage

1856

Abstract

A three-dimensional hybrid finite-boundary element formulation of eddy current nondestructive evaluation (NDE) is presented. The vector potential formulation considered is suitable for combining the boundary-element method (BEM) and finite-element method (FEM), because the linking conditions are expressed by the tangential component of the magnetic field for both methods. Even though there are four unknowns in the FEM formulation, it is attractive because it is easily implemented. The uniqueness of the vector potential is guaranteed and regions with different conductivities or nonlinear permeability can be modeled. The results indicate the feasibility of using the formulation for 3-D eddy current NDE applications

Keywords

boundary-elements methods; eddy current testing; finite element analysis; magnetic fields; vectors; boundary-element method; conductivities; eddy current NDE; finite-element method; linking conditions; magnetic field; nondestructive evaluation; nonlinear permeability; tangential component; three-dimensional hybrid finite-boundary element formulation; vector potential formulation; Aerospace engineering; Aerospace materials; Aluminum; Coils; Eddy currents; Finite element methods; Maxwell equations; Power engineering and energy; Probes; Solid modeling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.250767

Filename

250767