Luminescent coating image analysis on a three dimensional grid

Simple item page
dc.contributorBarkey, Mark E.
dc.contributorRoy, Samit
dc.contributorHaque, Anwarul
dc.contributorJackson, Jeff
dc.contributor.advisorHubner, James Paul
dc.contributor.authorEsirgemez, Ergin
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2017-02-28T22:25:11Z
dc.date.available2017-02-28T22:25:11Z
dc.date.issued2010
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractThe luminescent photoelastic coating (LPC) technique is a method to measure the full-field strain on three-dimensional (3D) structural components. A luminescent dye within a photoelastic binder is excited with circular polarized light, and the corresponding emission intensity for coating is detected via a CCD camera. Images are then processed to find the relative change in emission with respect to camera analyzer position, and subsequently analyzed to determine maximum in-plane shear strain. Image alignment plays a crucial role to obtain accurate measurements, especially when implementing an oblique excitation approach to separate the principal strains while accounting for non-strain related polarization changes due to surface inclination. Image warping methods in the image two-dimensional (2D) coordinate system provides reasonable results for 2D or simple 3D specimens; however, for complex 3D structures with moderate movement or deflection in the field-of-view, the accuracy and efficiency of these methods are not optimal. An alternative approach is to perform the analysis on a 3D grid representation of the structures. This study will research the merit of such an approach and develop the analysis procedures to separate the principal strains on 3D structures. The theoretical results will be compared to experimental data from a 2D and a 3D specimens while assessing the accuracy of the approach.en_US
dc.format.extent150 p.
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otheru0015_0000001_0000245
dc.identifier.otherEsirgemez_alatus_0004D_10332
dc.identifier.urihttps://ir.ua.edu/handle/123456789/751
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectAerospace engineering
dc.subjectApplied Mechanics
dc.subjectEngineering, Materials Science
dc.titleLuminescent coating image analysis on a three dimensional griden_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Aerospace Engineering and Mechanics
etdms.degree.disciplineAerospace Engineering
etdms.degree.grantorThe University of Alabama
etdms.degree.leveldoctoral
etdms.degree.namePh.D.

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
file_1.pdf
Size:
5.85 MB
Format:
Adobe Portable Document Format
Download

Collections

Theses and Dissertations
Theses and Dissertations - Department of Aerospace Engineering and Mechanics