Coupled Strain and Fresnel Response of Photoelastic Coatings at Oblique Incidence |
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| Authors: | J P Hubner L Chen |
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| Institution: | (1) Department of Aerospace Engineering and Mechanics, University of Alabama, Tuscaloosa, AL 35487, USA;(2) GE Aviation, Baltimore, MD 21220, USA |
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| Abstract: | This paper presents a theoretical model and corresponding experimental results of the oblique-incidence response of a luminescent
photoelastic coating (LPC). LPCs use a luminescent dye that both partially preserves the stress-modified polarization state
and provides high emission signal strength at oblique surface orientations. These characteristics enable the technique to
acquire full-field strain separated measurements and principal strain directions, potentially on complex three-dimensional
geometries, without the use of supplemental experimental or analytical techniques. Results of a single-layer LPC on a disk
in diametral compression are presented to assess a theoretical model and evaluate the measurement sensitivity.
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| Keywords: | Luminescent photoelastic coating Photoelasticity Strain separation Oblique incidence |
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