Low-velocity impact source localization in a composite sandwich structure using a broadband piezoelectric sensor network

Shirsendu Sikdar, Paresh Mirgal, Sauvik Banerjee

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9 Citations (Scopus)


An online structural health monitoring strategy for real-time impact source localisation in composite sandwich structure (CSS) is presented in this paper. A broadband piezoelectric (PZT) sensor-network based laboratory experiments and finite element method based numerical simulations of low-velocity steel-ball drop impacts at different locations on a CSS have been carried out. It is observed that the arrival-time of the impact-induced elastic wave signals increases with the increase in source-to-sensor distance. Further, the influence of impactor drop-height variations is studied by conducting a series of numerical simulations in ABAQUS. An arrival-time difference calculation based impact source localisation strategy is proposed to locate the impact regions in the CSS. The proposed monitoring strategy uses the registered impact signals (time-domain) at the PZTs to predict impact locations in real-time. Eventually, a study on the estimation of localisation error has been carried out to check the effectiveness of the proposed SHM strategy.

Original languageEnglish
Article number115619
Number of pages10
JournalComposite Structures
Early online date25 Apr 2022
Publication statusPublished - 1 Jul 2022
Externally publishedYes

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