Hopkinson introduced the Split-Hopkinson Pressure Bar (SHPB) test in 1964 for testing the performance of dynamic projectile deformation. This testing apparatus has evolved and was introduced to the rock mechanics community less than a few decades ago. Many researchers have different views on what is the proper Length to Diameter (L/D) ratio of the rock sample for a standard testing method. In this paper, we investigate different L/D ratios of 1.24 inch diameter Motoqua Quartzite sandstone samples. First of all, we will validate our SHPB setting using Aluminum 7075-T6 samples. This aluminum sample’s mechanical properties are well known and show consistent response under quasi-static and dynamic tests. This paper not only tested the sensitivity of the aluminum sample under different pressures, but also tested its behavior on different L/D ratios and showed the preliminary results of these tests. Different L/D rock sample results will be shown in this paper.
Effect of L/D ratio on dynamic response of Aluminum 7076 and the Natural Motoqua Quartzite Sandstone in Saint George, UT using Split Hopkinson Pressure Bar (SHPB)
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Changani, Hossein, Young, Aaron, and Eunhye Kim. "Effect of L/D ratio on dynamic response of Aluminum 7076 and the Natural Motoqua Quartzite Sandstone in Saint George, UT using Split Hopkinson Pressure Bar (SHPB)." Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, June 2013.
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