Numerical Simulations Of Inverse Planar Impact Tests On Sand
Researcher Leo Laine, ANKER-ZEMER Engineering AS

Abstract:
The SRSA - Swedish Rescue Services Agency is responsible of maintain shelters and Rescue Centres in an operative condition. Several objects include basements that need to withstand a threat of 125 kg TNT at a distance of 5 meters from the object.

To make accurate calculations of the weapon effects on buried structures one needs to predict the ground shock propagation in the surrounding soil. To accomplish this one needs to derive the necessary soil properties. The Equation of state (EOS) data for granular materials, such as sand, is important for accurate predictions of ground shock wave propagation and attenuation by use of an explicit solver.

In this paper inverse planar impact experiments are investigated to find out how they should be performed to derive EOS data of the “unknown” soil material. Numerical simulations with an explicit solver were performed to simulate inverse planar impact experiments. The purpose is to evaluate how the experiments could be performed and what characteristic data of the sand can be derived from this type of experiments.

Keywords: sand, equation of state, inverse planar impact, flyer plate, numerical simulation, shock waves, ground shock 

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