A new spectral finite element for the study of face sheet�core disbond identification in a sandwich panel

Murthy, MVVS and Gopalakrishnan, S and Poomani, D (2022) A new spectral finite element for the study of face sheet�core disbond identification in a sandwich panel. In: Thin-Walled Structures, 170 .

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Abstract

A new two-node spectral finite element for a sandwich panel with 13DOF/node is formulated to study the face sheet�core disbond in a sandwich panel. The spectral element formulation results in an exact dynamic stiffness matrix for the element. The study on wave propagation characteristics for both healthy and disbonded sandwich panel is carried out. The numerical results obtained using this spectral element are validated by comparing with the results obtained through simulations using commercially available finite element software. The effect of core damping for waves propagating in both through-thickness and along the length of the panel is clearly demonstrated. The interaction of the waves propagating between the face sheet�core disbond is studied and using numerical examples it is shown that the amplitude change is a measure to identify the disbond whereas the arrival times can be used to estimate the size of the disbond. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	Thin-Walled Structures
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Author
Keywords:	Finite element method; Honeycomb structures; Stiffness matrix; Wave propagation, Debond identification; Disbond; Element formulation; Exact dynamic stiffness matrixes; Face sheets; High frequency HF; Sandwich panel; Spectral element; Spectral finite element method; Spectral finite elements, Sandwich structures
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	31 Dec 2021 07:09
Last Modified:	31 Dec 2021 07:09
URI:	http://eprints.iisc.ac.in/id/eprint/70673

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