Identification of disbond and high density core region in a honeycomb composite sandwich structure using ultrasonic guided waves

Sikdar, Shirsendu and Banerjee, Sauvik (2016) Identification of disbond and high density core region in a honeycomb composite sandwich structure using ultrasonic guided waves. Composite Structures, 152. pp. 568-578. ISSN 0263-8223

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Abstract

The aim of this study is to identify disbond and high-density (HD) core region in a honeycomb composite sandwich structure (HCSS) using ultrasonic guided waves (GWs) and surface-bonded piezoelectric wafer transducers (PWTs). Towards this, an organized theoretical, numerical and experimental study has been carried out in order to understand the characteristics of GW propagation in a HCSS. A global matrix method based efficient and fast two dimensional (2D) semi-analytical model is used to study transient response and dispersion characteristics of the healthy HCSS under PWT excitations. Numerical simulation of GW propagation in HCSS with disbond and HD-core is then carried out using finite element package, ABAQUS. Laboratory experiments are then carried out to validate the theoretical and numerical results. A good agreement is observed between the theoretical, numerical and experimental results in all cases studied. It is found that the presence of HD-core region leads to decrease in amplitude of the propagating GW modes and the presence of disbond leads to substantial amplification of the primary anti-symmetric mode. Finally, based on these changes in modal behaviors, the location and size of unknown disbond and HD-core region within the PWT array are experimentally determined using a probability based damage detection algorithm.

Item Type: Article
Additional Information: Funding Information: This research was supported by the Indian Space Research Organization (ISRO), India. Under the Grant No. 11ISROC001.
Uncontrolled Keywords: disbond,group velocity,guided wave,high-density core,honeycomb composite sandwich structure,piezoelectric wafer transducers,ceramics and composites,civil and structural engineering ,/dk/atira/pure/subjectarea/asjc/2500/2503
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Depositing User: LivePure Connector
Date Deposited: 13 Oct 2021 02:17
Last Modified: 13 Oct 2021 02:17
URI: https://ueaeprints.uea.ac.uk/id/eprint/81683
DOI: 10.1016/j.compstruct.2016.05.064

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