Abstract
This research analyzes a novel high-throughput method for vibration-based fatigue testing. This method builds off previous research by Bruns and Zearley, where a carrier plate assembly containing a test specimen vibrates to failure. This method redesigns an aluminum carrier plate to simultaneously load three, instead of one, test specimens in parallel. The redesign was selected, using SolidWorks modal analysis, based on its ability to concentrate cyclic stress on the specimens, rather than on the plate, to extend the life of the plate. For experimental validation, the redesigned plate assembly was fatigued with an electrodynamic shaker following the same procedures as Bruns’ and Zearley’s assembly. The assembly was monitored with stereo digital image correlation to detect mode shape. Although the assembly exhibited the same mode shape as simulation experiments, fatigue tests could not be completed due to the large accelerations required to generate relatively small strains. Additional work is needed to identify other multi-insert designs capable of exerting larger fatigue strains.
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This work was sponsored in part by the AFRL Summer Faculty Fellowship Program.
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Burton, S.D., German, E.E., Furman, B.A., Holycross, C.M., Scott-Emuakpor, O., Berke, R.B. (2020). Improved Measurement for High-Cycle Fatigue Examination. In: Silberstein, M., Amirkhizi, A., Shuman, X., Beese, A., Berke, R., Pataky, G. (eds) Challenges in Mechanics of Time Dependent Materials, Fracture, Fatigue, Failure and Damage Evolution, Volume 2. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-29986-6_22
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DOI: https://doi.org/10.1007/978-3-030-29986-6_22
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