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Titel: Application of Ultraviolet (UV) Radiation and Fluorescence for DIC Measurements - Quality Improvement
VerfasserIn: König, Kristian
Reis, Martin
Vielhaber, Michael
Jung, Anne
Sprache: Englisch
Titel: Optics and lasers in engineering
Bandnummer: 158
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2022
Freie Schlagwörter: Digital image correlation
Ultraviolet
Fluorescence
Phosphorescence
Lighting system
Metal foam
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Digital image correlation (DIC) is a widely used method in materials science and experimental mechanics for full-field surface displacement or strain measurements. It is an optical method, which calculates displacement or strain fields from images taken during deformation of the test specimen and is able to achieve a sub-pixel accuracy in case of proper operation. However, the theoretical accuracy is strongly reduced by effects such as surface reflections or shadows resulting from a not ideal illumination or lighting system. This is especially the case for complex 3D structured specimen geometries such as for metal foams or other cellular materials. The present study investigates the usage of ultraviolet (UV) light illumination in combination with phosphorescent or fluorescent pigments used to apply the needed speckle pattern for high accuracy DIC. A method to optimise the lighting system in combination with the used background pigments is presented. Fluorescent pigments provide much better results than phosphorescent pigments. The application of UV lighting in combination with fluorescent background pigments strongly improves DIC accuracy not only for normal tensile specimens but also for complex 3D shaped metal foams by avoiding surface reflections and shadows.
DOI der Erstveröffentlichung: 10.1016/j.optlaseng.2022.107140
URL der Erstveröffentlichung: https://www.sciencedirect.com/science/article/abs/pii/S0143816622001920
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-386146
hdl:20.500.11880/34954
http://dx.doi.org/10.22028/D291-38614
ISSN: 0143-8166
Datum des Eintrags: 20-Jan-2023
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
NT - Systems Engineering
Professur: NT - Prof. Dr. Stefan Diebels
NT - Prof. Dr. Michael Vielhaber
NT - Keiner Professur zugeordnet
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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