Ultrasonic guided wave propagation and detection of high density core region in a honeycomb composite sandwich structure using embedded piezoelectric transducers

Shirsendu Sikdar, Sauvik Banerjee

Research output: Contribution to journalConference articlepeer-review


An organized numerical and experimental study is carried out in order to understand ultrasonic guided wave (GW) propagation and interaction with a high density (HD) core region in a honeycomb composite sandwich structure (HCSS). Also the location of HD core region in a HCSS using embedded piezoelectric wafer transducer (PWTs) is investigated in this study. Due to complex structural characteristics, the study of guided wave (GW) propagation in HCSS with HD-core region inherently carries many challenges. Therefore, a three-dimensional (3D) numerical simulation of GW propagation in the HCSS with and without HD core region is carried out using embedded PWT network. It is observed that the presence of HD core significantly reduces the amplitude of the propagating GW modes. In order to verify the numerical results, experiments are conducted in the laboratory. A good agreement between the numerical and experimental results is observed, in all the cases studied. Finally, based on the change in amplitude of the received GW modes, the location of an unknown HD core region, within the PWT array is determined by applying a probability based signal difference coefficient (SDC) algorithm.

Original languageEnglish
Article number18622
Pages (from-to)155-164
Number of pages10
JournalE-Journal of Nondestructive Testing & Ultrasonics
Issue number12
Publication statusPublished - 1 Dec 2015
Externally publishedYes
Event8th International Workshop NDT in Progress 2015 - Prague, Czech Republic
Duration: 12 Oct 201514 Oct 2015
Conference number: 8

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