Title :
An inverse analysis for crack identification in eddy current NDT of tubes
Author :
Lee, Hong-bae ; Jung, Hyun-Kyo ; Hahn, Song-Yop ; Chung, Jin-Kyo
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
9/1/1994 12:00:00 AM
Abstract :
This paper presents an inverse analysis for crack identification in eddy current nondestructive testing of tubes. The finite element modeling of axisymmetric eddy current phenomena is based on the formulation of the energy functional with the magnetic vector potential. An optimization algorithm in the inverse process employs the objective function expressed in terms of the impedance change of a differential probe which consists of two coils. The proposed method is applied to a simple axisymmetric model with a crack made arbitrarily
Keywords :
crack detection; eddy current testing; finite element analysis; functional analysis; inverse problems; optimisation; axisymmetric model; coils; crack identification; differential probe; eddy current nondestructive testing; energy functional; finite element modeling; impedance; inverse analysis; magnetic vector potential; objective function; optimization algorithm; tubes; Coils; Conductivity; Eddy current testing; Eddy currents; Equations; Finite element methods; Impedance; Optimization methods; Probes; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
