Abstract
Although being rarely categorised as “smart”, bulk materials seem to be useful for attenuating vibrations due to their nontypical dissipating properties, when subjected to underpressure. Granules in a typical particle impactor are free to move and collide. On the contrary, the proposed prototype beam, with a core filled with dilatant sand, explores the properties of the granular media in a quasi-solid phase, also called the jammed state. Using a controlled underpressure signal, properties of the sand core may be adjusted, giving a possibility of using such material as a smart damping member. An experimental study on the properties of a prototype layered beam filled with a non-Newtonian sand mixture is presented. Special beam construction allows pressurising grains by evacuating the air from inside the cover. By intensifying the compression, sand grains become jammed, resulting in increased stiffness and damping. Based on the exemplary experimental results, a custom rheological model parameter identification is performed.
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Acknowledgements
This research has been supported within the projects UMO-2017/26/E/ST8/00532 and UMO-2019/33/B/ST8/02686 funded by the Polish National Science Centre, which the authors gratefully acknowledge.
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Bajkowski, J.M., Dyniewicz, B., Bajer, C., Bajkowski, J. (2023). Rheological Model and Parameter Identification of a Kinetic Sand Used as a Smart Damping Material. In: Wu, Z., Nagayama, T., Dang, J., Astroza, R. (eds) Experimental Vibration Analysis for Civil Engineering Structures. Lecture Notes in Civil Engineering, vol 224. Springer, Cham. https://doi.org/10.1007/978-3-030-93236-7_54
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DOI: https://doi.org/10.1007/978-3-030-93236-7_54
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