Acoustic emission localization in a composite stiffened panel using a time reversal algorithm

Francesco Ciampa, Michele Meo

Research output: Chapter in Book/Report/Conference proceedingChapter

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Abstract

This research work presents an in-situ imaging method for the localization of the impact point in complex anisotropic structures with diffuse field conditions, using only one passive transducer. The proposed technique is based on the time reversal approach applied to a number of waveforms stored into a database containing the experimental Green's function of the medium. The present method exploits the benefits of multiple scattering, mode conversion and boundaries reflections to achieve the focusing of the source with high resolution. The optimal re-focusing of the back propagated wave field at the impact point is accomplished through a "virtual" imaging process, which does not require any iterative algorithms and a priori knowledge of the mechanical properties of the structure. The robustness of the time reversal method is experimentally demonstrated on a stiffened composite panel and the source position can be retrieved with a high level of accuracy (error less than 3%). The simple configuration, minimal processing requirements and computational time (less than 1 sec) make this method a valid alternative to the conventional imaging structural health monitoring systems for the acoustic emission source localization.
Original languageEnglish
Title of host publicationComposite Science and Technology
Place of PublicationZurich-Durnten
PublisherTrans Tech Publications
Pages910-915
Number of pages6
Volume471-472
ISBN (Print)1013-9826
DOIs
Publication statusPublished - 2011
Event8th International Conference on Composite Science and Technology, ICCST8, March 22, 2011 - March 24, 2011 - Kuala Lumpur, Malaysia
Duration: 1 Jan 2011 → …

Publication series

NameKey Engineering Materials
PublisherTrans Tech Publications

Conference

Conference8th International Conference on Composite Science and Technology, ICCST8, March 22, 2011 - March 24, 2011
CountryMalaysia
CityKuala Lumpur
Period1/01/11 → …

Fingerprint

acoustic emission
point impact
composite materials
structural health monitoring
transducers
waveforms
Green's functions
mechanical properties
requirements
high resolution
configurations
scattering

Cite this

Ciampa, F., & Meo, M. (2011). Acoustic emission localization in a composite stiffened panel using a time reversal algorithm. In Composite Science and Technology (Vol. 471-472, pp. 910-915). (Key Engineering Materials). Zurich-Durnten: Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/KEM.471-472.910

Acoustic emission localization in a composite stiffened panel using a time reversal algorithm. / Ciampa, Francesco; Meo, Michele.

Composite Science and Technology. Vol. 471-472 Zurich-Durnten : Trans Tech Publications, 2011. p. 910-915 (Key Engineering Materials).

Research output: Chapter in Book/Report/Conference proceedingChapter

Ciampa, F & Meo, M 2011, Acoustic emission localization in a composite stiffened panel using a time reversal algorithm. in Composite Science and Technology. vol. 471-472, Key Engineering Materials, Trans Tech Publications, Zurich-Durnten, pp. 910-915, 8th International Conference on Composite Science and Technology, ICCST8, March 22, 2011 - March 24, 2011, Kuala Lumpur, Malaysia, 1/01/11. https://doi.org/10.4028/www.scientific.net/KEM.471-472.910
Ciampa F, Meo M. Acoustic emission localization in a composite stiffened panel using a time reversal algorithm. In Composite Science and Technology. Vol. 471-472. Zurich-Durnten: Trans Tech Publications. 2011. p. 910-915. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.471-472.910
Ciampa, Francesco ; Meo, Michele. / Acoustic emission localization in a composite stiffened panel using a time reversal algorithm. Composite Science and Technology. Vol. 471-472 Zurich-Durnten : Trans Tech Publications, 2011. pp. 910-915 (Key Engineering Materials).
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