Locating damages in a complex structure using one or two fixed ultrasonic transducers

Rodriguez, S., Veidt, M., Castaings, M., Ducasse, Eric and Deschamps, M. (2016). Locating damages in a complex structure using one or two fixed ultrasonic transducers. In: Dale E. Chimenti and Leonard J. Bond, 42nd Review of Progress in Quantitative Nondestructive Evaluation: AIP Conference Proceedings. Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), Minneapolis, MN, United States, (030020.1-030020.8). 26-31 July 2015. doi:10.1063/1.4940446

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Author Rodriguez, S.
Veidt, M.
Castaings, M.
Ducasse, Eric
Deschamps, M.
Title of paper Locating damages in a complex structure using one or two fixed ultrasonic transducers
Conference name Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
Conference location Minneapolis, MN, United States
Conference dates 26-31 July 2015
Proceedings title 42nd Review of Progress in Quantitative Nondestructive Evaluation: AIP Conference Proceedings   Check publisher's open access policy
Journal name AIP Conference Proceedings   Check publisher's open access policy
Place of Publication Melville, NY, United States
Publisher AIP Publishing
Publication Year 2016
Sub-type Fully published paper
DOI 10.1063/1.4940446
Open Access Status DOI
ISBN 9780735413535
ISSN 1551-7616
Editor Dale E. Chimenti
Leonard J. Bond
Volume 1706
Start page 030020.1
End page 030020.8
Total pages 8
Collection year 2017
Formatted Abstract/Summary
Detecting and locating defects in a plate is usually performed using multiple transducers and methods that are based on the measurement of the wave travelling directly from the defect to the transducer. The acoustic signatures of the interaction between the interrogating wave with the defects and the structure itself, such as the reflections from the boundaries, are generally discarded from the signal. This paper deals with the experimental application of the topological imaging method that takes advantage of all the information included in the multiple reflections between the boundaries of the structure and the defects. The application of the method is based on a preliminary measurement of the impulse response of the inspected structure in its undamaged state. The impulse response measurement is restricted to a defined region of interest and the structure is excited with a single fixed transducer. This preliminary measurement can be considered as a general acoustic calibration of the inspected structure that is performed once and for all, in the present case with a Laser Doppler velocimeter. The structure is then inspected with the single or several transducers and, if any, damages are located in the region of interest. The experimental results obtained with the one-channel topological imaging method show accurate location of a single small defect and of multiple small defects. The resolving power obtained is close to the theoretical limit of half a wavelength. These results demonstrate that the method has great potential for complex structures in general and for SHM applications involving a limited number of embedded transducers.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4940492

Document type: Conference Paper
Collections: School of Mechanical & Mining Engineering Publications
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Created: Fri, 18 Mar 2016, 10:50:10 EST by Maata Moka on behalf of School of Mechanical and Mining Engineering