Instantaneous Damage Identification and Localization through Sparse Laser Ultrasonic Scanning

Abstract : This study proposes an instantaneous damage identification and localization technique through sparse laser ultrasonic scanning. First, an inspection path is selected from an intended inspection region of a target structure. Then, ultrasonic waves are generated at one endpoint A of the path with a pulse laser and the corresponding ultrasonic responses are obtained at the other endpoint B with a laser Doppler vibrometer (LDV). Second, ultrasonic waves generated at point B are measured at point A reciprocally. Once two reciprocal ultrasonic signals are obtained, a damage index (DI) representing the violation of the linear reciprocity on the path is computed by comparing the reciprocal signals. DI will increase when the path passes through damage as this generates nonlinearity to the path. Third, the aforementioned steps are repeated for all predetermined inspection paths within the inspection region by scanning both pulse laser and LDV. Finally, the paths associated with high DI values are identified as damage regions. The effectiveness of the proposed sparse scanning technique is validated using an aluminium plate with a fatigue crack and a composite plate with an impact induced delamination.
Type de document :
Communication dans un congrès
Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
Liste complète des métadonnées

https://hal.inria.fr/hal-01020410
Contributeur : Anne Jaigu <>
Soumis le : mardi 8 juillet 2014 - 10:08:57
Dernière modification le : mardi 8 juillet 2014 - 13:41:24
Document(s) archivé(s) le : mercredi 8 octobre 2014 - 12:01:05

Fichier

0009.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01020410, version 1

Collections

Citation

Byeongjin Park, Hoon Sohn. Instantaneous Damage Identification and Localization through Sparse Laser Ultrasonic Scanning. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01020410〉

Partager

Métriques

Consultations de la notice

151

Téléchargements de fichiers

620