Experiments and Simulation of Split Hopkinson Bar tests on Sand

Split Hopkinson Bar data has been generated for well controlled dry and wet sand under confined and unconfined conditions. Simulations have been performed with the Lagrangian hydrocode DYNA using a Porter-Gould Equation of State (EOS) and Johnson-Holmquist type constitutive model. Comparison with the raw strain gauge data is qualitatively reasonable, although some of the details of the trace are not reproduced. This has given some insights into how the constitutive model should be improved.