A Crack Quantitative Technology in Riveted Structure Based on Pulsed Remote Field Eddy Current
XU Junmin
YANG Binfeng
WANG Xiaofeng
LI Chi
ZHANG Hui
Abstract：Aimed at the problem that crack is very hard to be evaluated quantitatively in the riveted structure at aircraft fuselage,pulsed remote field eddy current testing technology is used to detect the crack of riveted struc-ture.The cracks quantitative evaluation in riveted structures are studied by utilizing the advantages rich in the pulsed spectrum components and more information.Firstly,a three-dimensional model of remote field eddy current riveted structure is established to detect crack so as to get crack position.Then,the influence of crack type and size on detection signal is analyzed and the classification of surface and sub-surface cracks is realized according to the different relation between direct coupling component and crack depth.Finally,the quantitative detection of crack depth is realized by zero cross time changes.Under the premise of knowing crack depth,direct coupling component amplitude and indirect coupling component amplitude are used for quantitative evaluation of the crack length on surface and sub-surface respectively.
Keywords：pulsed remote field eddy currentriveted structurecrack testingidentificationquantitative detection
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 79-84 )