Contribution to collective works (Parts of books)
Automated Defect Detection Algorithm Applied to Shearography in Composites
Vandenrijt, Jean-François; Georges, Marc
2014In Osten, Wolfgang (Ed.) Fringe 2013
 

Files


Full Text
JFV-Fringe-13.pdf
Author preprint (591.29 kB)
Download
Annexes
Poster_DECOMPOSIT_bubbles.pdf
Publisher postprint (5.32 MB)
Poster
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
shearography; interferometry; nondestructive testing
Abstract :
[en] The aeronautic industry is progressively introducing composite material in its products. Nowadays the fabrication begins to be mature, but huge efforts remains to be done on the experimental validation of these materials. More specifically, these composite materials introduce new type of defects (such as delamination, glue defects…) which need to be detected during the fabrication and maintenance to prevent failures. Moreover, the widespread use of these materials impose to the future detection instruments to be cheap, robust and easy to manipulate by non-specialists. Currently shearography is widely used for the detection of defects in the composite material. It is cheap, and relatively robust and flexible, but requires special qualification to interpret the shearograms and identify the defects. Therefore, efforts need to be carried to ease the interpretation of stereographic results for non-specialist of the technique. For this, we propose to automate the identification of defects in shearograms by the development of specific algorithms. In this paper, we present an innovative algorithm which realizes this operation. The process inspects the wrapped phase map obtained to identify high local fringe density. These potential detects are then analyzed and selected based on a set of parameter criteria such as dimensions, shape, and detection threshold. Successful results obtained on thermally solicited composite sample observed in industrial conditions are shown. We also discuss the limitations and perspective of this approach.
Research center :
CSL - Centre Spatial de Liège - ULiège
Disciplines :
Physics
Author, co-author :
Vandenrijt, Jean-François  ;  Université de Liège - ULiège
Georges, Marc ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Language :
English
Title :
Automated Defect Detection Algorithm Applied to Shearography in Composites
Publication date :
2014
Main work title :
Fringe 2013
Editor :
Osten, Wolfgang
Publisher :
Springer Berlin Heidelberg
ISBN/EAN :
978-3-642-36358-0
Pages :
237-240
Name of the research project :
DéComposit
Available on ORBi :
since 17 September 2013

Statistics


Number of views
125 (27 by ULiège)
Number of downloads
444 (13 by ULiège)

Scopus citations®
 
5
Scopus citations®
without self-citations
3
OpenCitations
 
2

Bibliography


Similar publications



Contact ORBi