Abstract
Two long tubes each of aluminum and polymethyl methacrylate, with two different wall thicknesses, were subjected to transverse impact by two different steel spheres when in an empty or a fluid-filled condition. Water and a high-density electric capacitor liquid were emplaced in the interior, usually under stationary, but occasionally under streaming, conditions. Input-force history and response of the system at two gage stations involving single axial and hoop, as well as coupled symmetric and antisymmetric strain histories, were recorded from the response of strain gages, while fluid pressures were measured by means of small tourmaline crystals suspended at the tube center line. The effect of parameter variation in input and system material and geometry on these quantities was studied. The measured signal speed and frequency of the breathing mode of the system were compared with corresponding analytical predictions.
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