Pulsed eddy current testing with variable duty cycle on rivet joints

In pulsed eddy current testing, repetitive excitation signals with different duty cycles have different spectral representations. This work studies the influence of duty cycle on the ability to detect holes and EDM notches beneath rivet heads in subsurface layers of stratified samples. Feature patte...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2009-10, Vol.42 (7), p.599-605
Main Authors: Abidin, Ilham Zainal, Mandache, Catalin, Tian, Gui Yun, Morozov, Maxim
Format: Article
Language:English
Subjects:
Analysing. Testing. Standards
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Finite element analysis
Materials science
Materials testing
Metals. Metallurgy
Nondestructive testing
Physics
Pulse width
Pulsed eddy current
Testing for defects
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Summary:In pulsed eddy current testing, repetitive excitation signals with different duty cycles have different spectral representations. This work studies the influence of duty cycle on the ability to detect holes and EDM notches beneath rivet heads in subsurface layers of stratified samples. Feature patterns for the integrity of rivet joints are proposed and verified. The proposed method has the added advantage in that no reference sample is needed while employing multiple pulse measurements, with different pulse widths. Experimental testing and modelling approaches are discussed in connection with defect depth quantification, which can be extended to the quantification of complex defects.
ISSN:0963-8695
1879-1174
DOI:10.1016/j.ndteint.2009.04.001