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Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack
Joint Authors
Lee, Jung-Ryul
Kong, Cheol-Won
Jang, Jae-Kyeong
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-05-05
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
This study presents a noncontact sensing technique with ultrasonic wave propagation imaging algorithm, for damage visualization of liquid-immersed structures.
An aluminum plate specimen (400 mm × 400 mm × 3 mm) with a 12 mm slit was immersed in water and in glycerin.
A 532 nm Q-switched continuous wave laser is used at an energy level of 1.2 mJ to scan an area of 100 mm × 100 mm.
A laser Doppler vibrometer is used as a noncontact ultrasonic sensor, which measures guided wave displacement at a fixed point.
The tests are performed with two different cases of specimen: without water and filled with water and with glycerin.
Lamb wave dispersion curves for the respective cases are calculated, to investigate the velocity-frequency relationship of each wave mode.
Experimental propagation velocities of Lamb waves for different cases are compared with the theoretical dispersion curves.
This study shows that the dispersion and attenuation of the Lamb wave is affected by the surrounding liquid, and the comparative experimental results are presented to verify it.
In addition, it is demonstrated that the developed fully noncontact ultrasonic propagation imaging system is capable of damage sizing in submerged structures.
American Psychological Association (APA)
Lee, Jung-Ryul& Jang, Jae-Kyeong& Kong, Cheol-Won. 2014. Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack. Shock and Vibration،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1048025
Modern Language Association (MLA)
Lee, Jung-Ryul…[et al.]. Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack. Shock and Vibration No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-1048025
American Medical Association (AMA)
Lee, Jung-Ryul& Jang, Jae-Kyeong& Kong, Cheol-Won. Fully Noncontact Wave Propagation Imaging in an Immersed Metallic Plate with a Crack. Shock and Vibration. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1048025
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1048025