Soil is the most ubiquitous material used for structure protection from blast. Yet its dynamical properties still remain elusive. We outline the design of a simple device that emulates blast protective measures. This devise can be used to test granular material properties under dynamical rather than static conditions.
The devise is designed for purpose of experimental and numerical investigation of soil properties, and protection. To calibrate the granular material properties via simulations we use the LS-DYNA code. The simulation addresses the relative importance of the material bulk consecutive model vs. wall friction.
The numerical model that was implemented in the LS-DYNA code consists of two main meshes. The first being a Lagrangian mesh that include the envelope and the plates, and the second mesh which models the sand and air motion is an arbitrary Lagrangian Eulerian (ALE) mesh. The two meshes interact using a fluid stature interaction algorithm (FSI).
We will present the experimental results, and our numerical simulations along with the assumption that are made to fit the simulations to the experimental results.
