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Acoustic emission localization in complex dissipative anisotropic structures using a one-channel reciprocal time reversal method


Reference:

Ciampa, F. and Meo, M., 2011. Acoustic emission localization in complex dissipative anisotropic structures using a one-channel reciprocal time reversal method. Journal of the Acoustical Society of America, 130 (1), pp. 168-175.

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    Official URL:

    http://dx.doi.org/10.1121/1.3598458

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    Abstract

    This paper presents an 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 reciprocal time reversal approach (inverse filtering) applied to a number of waveforms stored into a database containing the experimental Green's function of the structure. Unlike most acoustic emission monitoring systems, the present method exploits the benefits of multiple scattering, mode conversion, and boundaries reflections to achieve the focusing of the source with high resolution. Compared to a standard time reversal approach, the optimal refocusing of the back propagated wave field at the impact point is accomplished through a virtual imaging process. The robustness of the inverse filtering technique is experimentally demonstrated on a dissipative stiffened composite panel and the source position can be retrieved with a high level of accuracy in any position of the structure. Its very simple configuration and minimal processing requirements make this method a valid alternative to the conventional imaging Structural Health Monitoring systems for the acoustic emission source localization.

    Details

    Item Type Articles
    CreatorsCiampa, F.and Meo, M.
    DOI10.1121/1.3598458
    Related URLs
    URLURL Type
    http://www.scopus.com/inward/record.url?scp=79960667825&partnerID=8YFLogxKUNSPECIFIED
    DepartmentsFaculty of Engineering & Design > Mechanical Engineering
    Research CentresMaterials Research Centre
    Aerospace Engineering Research Centre
    RefereedYes
    StatusPublished
    ID Code25338

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