Damage assessment in a sandwich panel based on full-field vibration measurements
Author
dc.contributor.author
Seguel, F.
Author
dc.contributor.author
Meruane Naranjo, Viviana
Admission date
dc.date.accessioned
2019-05-31T15:18:54Z
Available date
dc.date.available
2019-05-31T15:18:54Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
Journal of Sound and Vibration, Volumen 417, 2018
Identifier
dc.identifier.issn
10958568
Identifier
dc.identifier.issn
0022460X
Identifier
dc.identifier.other
10.1016/j.jsv.2017.11.048
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/169272
Abstract
dc.description.abstract
Different studies have demonstrated that vibration characteristics are sensitive to
debonding in composite structures. Nevertheless, one of the main restrictions of vibration
measurements is the number of degrees of freedom that can be acquired simultaneously,
which restricts the size of the damage that can be identified. Recent studies have shown
that it is possible to use high-speed three-dimensional (3-D) digital image correlation
(DIC) techniques for full-field vibration measurements. With this technique, it is possible
to take measurements at thousands of points on the surface of a structure with a single
snapshot. The present article investigates the application of full-field vibration measurements in the debonding assessment of an aluminium honeycomb sandwich panel.
Experimental data from an aluminium honeycomb panel containing different damage
scenarios is acquired by a high-speed 3-D DIC system; four methodologies to compute
damage indices are evaluated: mode shape curvatures, uniform load surface, modal strain
energy and gapped smoothing.