Title:
Computational characterization of adhesive bond properties using guided waves in bonded plates

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dc.contributor.advisor Jacobs, Laurence J.
dc.contributor.advisor Valle, Christine
dc.contributor.author Koreck, Juergen en_US
dc.contributor.committeeMember Qu, Jianmin
dc.contributor.department Civil and Environmental Engineering en_US
dc.date.accessioned 2007-03-27T18:24:50Z
dc.date.available 2007-03-27T18:24:50Z
dc.date.issued 2006-08-25 en_US
dc.description.abstract This research focuses on the application of guided waves techniques to nondestructively characterize the structural integrity of bonded engineering components. Computational methods are used to examine the properties of multi-layered, adhesive bonded plates. This study quantifies the effect of the adhesive bond parameters (Young's modulus, Poisson's ration and bond thickness) on the dispersion curves. A commercial finite element (FE) code (ABAQUS/Explicit) is used for the numerical model while the global matrix method and the waveguide FE method are used to benchmark the resulting dispersion relationships in the form of a frequency-wavenumber or slowness-frequency relation. The postprocessing of FE data includes the two-dimensional Fourier transform (2D-FFT) and the short-time Fourier transform (STFT). Note that the 2D-FFT and STFT operate on multiple or just one transient output signals of the FE results respectively, while the waveguide FE method uses mass-, damping- and stiffness-matrices to generate the dispersion relations. In the dispersion relations, a set of bond parameter sensitive and FE-visible points is selected. The frequency locations of these points represent the solution criteria for the inversion procedure based on the global matrix method. The capabilities of the inversion process depend on the number of transient output signals from an FE simulation for the forward problem. en_US
dc.description.degree M.S. en_US
dc.format.extent 1321680 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/14121
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Finite element en_US
dc.subject Inversion en_US
dc.subject Dispersion curves en_US
dc.title Computational characterization of adhesive bond properties using guided waves in bonded plates en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.advisor Jacobs, Laurence J.
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 5af40958-ece2-4a76-b071-5ba4c6d99d80
relation.isOrgUnitOfPublication 88639fad-d3ae-4867-9e7a-7c9e6d2ecc7c
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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