Visualization of dynamic stress conditions in elastic solids utilizing high frequency stroboscopic LED arrays

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dc.identifier.uri http://dx.doi.org/10.15488/10279
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/10352
dc.contributor.author Shi, Jian
dc.contributor.author Ohrdes, Hendrik
dc.contributor.author Weinstein, Michael
dc.contributor.author Twiefel, Jens
dc.date.accessioned 2020-12-08T15:27:07Z
dc.date.available 2020-12-08T15:27:07Z
dc.date.issued 2019
dc.identifier.citation Shi, J.; Ohrdes, H.; Weinstein, M.; Twiefel, J.: Visualization of dynamic stress conditions in elastic solids utilizing high frequency stroboscopic LED arrays. In: Proceedings of SPIE 11105 (2019), 1110503. DOI: https://doi.org/10.1117/12.2529955
dc.description.abstract Ultrasonic mechanical vibrations in solids are widely used in non-destructive testing, and high-power applications such as ultrasonic welding or soldering. The visualization of ultrasonic wave propagation in transparent solids is helpful for understanding the ultrasonic behaviours. The classical method of photoelasticity allows the visualization of the static stress distribution in birefringent materials. Utilizing recent high-power LEDs in the photoelasticity allows to capture dynamic stresses by high frequency stroboscopic light. High frequency stationary and transient oscillation processes in elastic solids can be visualized with this method. The designed LED array in this paper has a dimension of 210 mm 300 mm, and every LED has distance of 38mm to each other, and the light intensity has a homogeneity value. The temporal and spatial resolution of stress-optic systems depends mainly on the dynamic properties of the lighting technology used. The high speed synchronization of the stroboscopic light sources results in a high temporal resolution of the photoelasticity analyses. This enables the photoelastic investigation of highly dynamic load conditions, such as longitudinal waves and transverse waves. eng
dc.language.iso eng
dc.publisher Bellingham : SPIE
dc.relation.ispartofseries Proceedings of SPIE 11105 (2019)
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject Dynamic photoelasticity eng
dc.subject IGBT eng
dc.subject Stroboscopic LED array eng
dc.subject Ultrasound eng
dc.subject.ddc 620 | Ingenieurwissenschaften und Maschinenbau ger
dc.title Visualization of dynamic stress conditions in elastic solids utilizing high frequency stroboscopic LED arrays eng
dc.type conferenceObject
dc.type article
dc.type Text
dc.relation.doi https://doi.org/10.1117/12.2529955
dc.bibliographicCitation.volume 11105
dc.bibliographicCitation.firstPage 1110503
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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