Paper number 396
|COMPOSITE MATERIALS AND STRUCTURES TESTING BY ELECTRONIC HOLOGRAPHY|
Dan N. Borza1
1Laboratoire de Mécanique de Rouen, Institut National des Sciences Appliquées de Rouen
Place Blondel, BP 08, Mont-Saint-Aignan, France
|Summary||The paper presents the use of phase-stepped electronic holography as an NDT tool, in particular using vibration stressing for detecting structural and material damage, and using thermal stressing for detecting defects in composites. After a short introductory description of this technique and of the most frequently used stressing methods used in testing, some of the criteria used for localization and identification of defects are presented and illustrated with experimental results. Both material damage and assembling faults are detected by applying these criteria and by an adequate choice of the frequency range of excitation and of the optical setup parameters.
||Keywords|| interferometry, electronic holography, non-destructive testing, stressing techniques, wrapped phase, fringe visibility, vibrations, thermal.
Theme : NDE and Reliability ; Others
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