DocumentCode :
809128
Title :
Numerical simulation of pulsed eddy-current nondestructive testing phenomena
Author :
Dai, Xiao-Wei ; Ludwig, Reinhold ; Palanisamy, R.
Author_Institution :
Dept. of Electr. Eng., Worcester Polytech. Inst., MA, USA
Volume :
26
Issue :
6
fYear :
1990
fDate :
11/1/1990 12:00:00 AM
Firstpage :
3089
Lastpage :
3096
Abstract :
A general-purpose hybrid finite-element and finite-difference computational model developed for the prediction of pulsed eddy-current distribution in metals for nondestructive testing purposes is discussed. The numerical model uses an axisymmetric formulation to study coil configurations suspended over a metallic specimen. As a driving function, a pulsed Maxwell-distributed current density is applied. Resulting eddy-current distributions are discussed as a function of conductivity, permeability, and lift-off. The transition voltage response of a coil over an infinite half-space is numerically computed and compared to the solution obtained by a novel analytical approach. The numerical model is then used to determine the induced voltage due to a surface-breaking flaw
Keywords :
crack detection; difference equations; eddy current testing; finite element analysis; numerical methods; partial differential equations; transient response; analytical approach; axisymmetric cracks; axisymmetric formulation; finite-difference computational model; general purpose hybrid finite element model; induced voltage; metals; numerical model; numerical simulation; partial differential equations; pulsed Maxwell-distributed current density; pulsed eddy-current distribution; pulsed eddy-current nondestructive testing phenomena; surface-breaking flaw; transition voltage response; Coils; Computational modeling; Distributed computing; Finite difference methods; Finite element methods; Nondestructive testing; Numerical models; Numerical simulation; Predictive models; Voltage;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.102897
Filename :
102897
Link To Document :
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