TY - GEN
T1 - Visualization of structural defects based on ultrasonic wave propagation imaging technique using pulsed laser system
AU - Lee, Changgil
AU - Shin, Eun Seok
AU - Kim, Hyun Uk
AU - Park, Seunghee
PY - 2013
Y1 - 2013
N2 - In this study, structural defects are visualized and localized based on a noncontact nondestructive testing (NDT) method which utilizes an ND: YAG pulsed laser system. The ND: YAG pulsed laser is used to generate Lamb waves of a plate-like structure and to scan specific area of the target structure for the visualization of the structure. Wave responses are measured using only single piezoelectric sensor. The measured responses are analyzed using 3 dimensional Fourier transform. The damage-sensitive features are extracted by wave-number filtering based on the 3D FT. Then, flaw imaging technique of a plate-like structure is conducted using the damage-sensitive features. Finally, the plate with a notch is investigated to verify the effectiveness and the robustness of the proposed NDT approach.
AB - In this study, structural defects are visualized and localized based on a noncontact nondestructive testing (NDT) method which utilizes an ND: YAG pulsed laser system. The ND: YAG pulsed laser is used to generate Lamb waves of a plate-like structure and to scan specific area of the target structure for the visualization of the structure. Wave responses are measured using only single piezoelectric sensor. The measured responses are analyzed using 3 dimensional Fourier transform. The damage-sensitive features are extracted by wave-number filtering based on the 3D FT. Then, flaw imaging technique of a plate-like structure is conducted using the damage-sensitive features. Finally, the plate with a notch is investigated to verify the effectiveness and the robustness of the proposed NDT approach.
KW - Flaw image
KW - Noncontact NDT
KW - Scanning laser source
KW - Ultrasonic wave propagation image
KW - Wave-number filtering
UR - https://www.scopus.com/pages/publications/84873026650
U2 - 10.4028/www.scientific.net/AMM.281.620
DO - 10.4028/www.scientific.net/AMM.281.620
M3 - Conference contribution
AN - SCOPUS:84873026650
SN - 9783037855928
T3 - Applied Mechanics and Materials
SP - 620
EP - 623
BT - 2nd International Conference on Mechanical Engineering, Materials and Energy, ICMEME 2012
T2 - 2nd International Conference on Mechanical Engineering, Materials and Energy, ICMEME 2012
Y2 - 26 October 2012 through 27 October 2012
ER -