Abstract
We are studying strongly-coupled fluid-structure interaction generated by a stress wave propagating along the surface in the slurry (mixture of water and solid particles) adjacent to a thin solid shell. This is realized, experimentally, through projectile impact along the axis of a slurry-filled tube. We have tested polycarbonate tubes with 52 mm inner diameter and 4 mm wall-thicknesses. A steel impactor is accelerated to 1 m/s by gravity and strikes a polycarbonate buffer within the tube located at the top of the slurry surface. Strain gages measure hoop strains every 200 mm and pressure transducer records reflected pressure at the closed end of the specimen tube. Since we use the polycarbonate tube, we can visualize original distribution of solid particles inside the specimen tube and motions of particles due to the propagation of slurry hammer for low volume fraction cases. Wave speeds obtained in our experiments decreased as volume fraction of particles of calcium carbonate increases while theoretical wave speeds proposed by Han et al. (1998) for a slurry hammer are independent on the fraction. Reflected pressure reduces when a volume fraction of particle increases while the impulse calculated by integrating reflected pressure histories just slightly reduces with the fraction increasing.
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Inaba, K., Takahashi, H., Kollika, N., Kishimoto, K. (2011). Visualization and measurements of wave propagations in slurry hammers. In: Proulx, T. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8228-5_66
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DOI: https://doi.org/10.1007/978-1-4419-8228-5_66
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