Show simple item record

dc.contributor.authorKoreck, Juergenen_US
dc.date.accessioned2007-03-27T18:24:50Z
dc.date.available2007-03-27T18:24:50Z
dc.date.issued2006-08-25en_US
dc.identifier.urihttp://hdl.handle.net/1853/14121
dc.description.abstractThis 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.format.extent1321680 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectFinite elementen_US
dc.subjectInversionen_US
dc.subjectDispersion curvesen_US
dc.titleComputational characterization of adhesive bond properties using guided waves in bonded platesen_US
dc.typeThesisen_US
dc.description.degreeM.S.en_US
dc.contributor.departmentCivil and Environmental Engineeringen_US
dc.description.advisorCommittee Chair: Jacobs, Laurence; Committee Co-Chair: Valle, Christine; Committee Member: Qu, Jianminen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record