Detection of disbonds in multi-layer bonded structures using the laser ultrasonic pulse-echo mode.
Disbond
Laser ultrasound
Multi-layer bonded structure
Quantitative characterization
Journal
Ultrasonics
ISSN: 1874-9968
Titre abrégé: Ultrasonics
Pays: Netherlands
ID NLM: 0050452
Informations de publication
Date de publication:
Apr 2019
Apr 2019
Historique:
received:
16
11
2017
revised:
18
04
2018
accepted:
05
06
2018
pubmed:
17
7
2018
medline:
17
7
2018
entrez:
16
7
2018
Statut:
ppublish
Résumé
The laser ultrasonic technique with a pulse-echo mode has been investigated to detect disbonds in a multi-layer bonded structure and a quantitative method has been proposed to evaluate the defect sizes. The simulations were carried out to analyze influences of spot sizes on the characteristics of laser ultrasonic reflected waves, the interaction of laser ultrasonic reflected waves with disbonds, and quantitative characterization on disbonds. A noncontact laser ultrasonic inspection system has been established to perform a series of experiments to verify the theoretical results. Laser ultrasonic C-scans based on reflected shear waves can clearly redraw appearances of disbonds in the adhesive bond. The proposed quantitative method can evaluate the sizes of disbonds within a reasonable error range. Moreover, the experimental data are in good agreement with the simulation results. Therefore, a combination of the laser ultrasonic pulse-echo mode and the proposed quantitative strategy is practical for accurate detection of disbonds in multi-layer bonded structures.
Identifiants
pubmed: 30007576
pii: S0041-624X(17)30971-X
doi: 10.1016/j.ultras.2018.06.005
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
411-418Informations de copyright
Copyright © 2018 Elsevier B.V. All rights reserved.