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Article Dans Une Revue NDT & E International Année : 2014

Eddy-current non-destructive testing system for the determination of crack orientation

Résumé

Detecting theorientationofdeeporientedcracksisamajorchallengeinthedevelopmentofEddy- Current (EC)Non-DestructiveTesting(NDT).Infact,thedetectionsensitivityofEC-NDTdependsonthe interactionbetweenthecracklengthdirectionandtheEC flowinginthematerials.Inconventional EC-NDT systems,theinducedcurrentsareprimarilygeneratedalongasingledirectioninthetested sample. Thispaperpresentsanewexcitationmethodforgeneratingapseudo-rotatingacmagnetic field and, consequently,pseudo-rotatingeddycurrents.Thismethodsignificantly improvesthedetectionof deep cracksofanyorientation.ThedetectedsignalduetothecrackismeasuredbyanImprovedGiant Magneto-ResistanceMagnetometer(IGMRM).Themagnetic flux densitysignatureofthecrackisstudied using a3D finite elementmodel.Numericalandexperimentalresultsdemonstratethepotentialandthe efficiency ofthismethod.
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Dates et versions

hal-00987058 , version 1 (05-05-2014)

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Rimond Hamia, Christophe Cordier, Christophe Dolabdjian. Eddy-current non-destructive testing system for the determination of crack orientation. NDT & E International, 2014, 61, pp.24-28. ⟨10.1016/j.ndteint.2013.09.005⟩. ⟨hal-00987058⟩
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