Evaluating the III-posedness of inverse problem to size flaws from eddy current NDT signals obtained with an absolute type probe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study discusses the applicability of eddy current testing to the non-destructive evaluation of the depth of a flaw. Three-dimensional finite element simulations are carried out to calculate eddy current signals due to a flaw, and subsequent calculations correlate the difference between signals due to two flaws with the difference between the depths of the flaws. Standard deviation of the difference between the depths of the flaws is used to discuss the ill-posedness of the problem. A flaw is modeled as a sufficiently long rectangular region with a constant width and uniform electrical conductivity; an absolute pancake probe is considered. This study reveals that lift-off and coil diameter do not have a large effect on the ill-posedness, which supports that it is reasonable to decide parameters in actual inspections so that signal-to-noise ratio is maximized. The results obtained also indicate the difficulty in evaluating the depth of a flaw deeper than 1 mm using the signals obtained using an absolute pancake probe.

Original languageEnglish
Title of host publicationMechanical and Electrical Technology VI
PublisherTrans Tech Publications Ltd
Pages337-341
Number of pages5
ISBN (Print)9783038352051
DOIs
Publication statusPublished - 2014 Jan 1
Event6th International Conference on Mechanical and Electrical Technology, ICMET 2014 - Bangkok, Thailand
Duration: 2014 Jul 172014 Jul 18

Publication series

NameApplied Mechanics and Materials
Volume619
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other6th International Conference on Mechanical and Electrical Technology, ICMET 2014
CountryThailand
CityBangkok
Period14/7/1714/7/18

Keywords

  • Crack
  • Finite element simulation
  • Inverse problem
  • Non-destructive evaluation
  • Non-destructive testing

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Evaluating the III-posedness of inverse problem to size flaws from eddy current NDT signals obtained with an absolute type probe'. Together they form a unique fingerprint.

  • Cite this