Damage Detection in Composites by Noncontact Laser Ultrasonic - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Conference Papers Year : 2014

Damage Detection in Composites by Noncontact Laser Ultrasonic


This study proposes an instantaneous damage localization technique for composite structures using noncontact laser ultrasonics. First, a velocity profile of the target composite structure is obtained by measuring wave velocities on paths with various directions. Second, laser ultrasonic responses from two excitation-sensing pairs, called inspection pairs, are obtained. Then possible damage locations are estimated through time-of-flight triangulation of damage reflected waves. Once possible damage locations are estimated, ultrasonic response collection is repeated near the estimated locations for precise damage localization. The proposed technique has following advantages over existing technique: (1) It does not require any sensor installation, (2) Wave velocity profile, which has been mandatory information for time-of-flight triangulation, can be easily experimentally constructed, and (3) It can localize damage with a high precision with its scanning capability. The feasibility of the proposed technique is examined by localizing a delamination in a real 10 kW wind turbine blade.
Fichier principal
Vignette du fichier
0122.pdf (735.97 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-01020364 , version 1 (08-07-2014)


  • HAL Id : hal-01020364 , version 1


Byeongjin Park, Hoon Sohn, Pawel Henryk Malinowski, Wiesław Ostachowicz. Damage Detection in Composites by Noncontact Laser Ultrasonic. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01020364⟩
152 View
458 Download


Gmail Facebook Twitter LinkedIn More