Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Abstract

Granular matter possesses impact-absorbing property due to its energy dissipation character. To investigate the impact-absorbing capacity of granular matter, the discrete element method (DEM) is adopted to simulate the impact of a spherical projectile on to a granular bed. The dynamic responses of the projectile are obtained for both thin and thick granular bed. The penetration depth of the projectile and the first impact peak are investigated with different bed thicknesses and impact velocities. Determining a suitable bed thickness is crucial to the buffering effect of granular matter. The first impact peak is independent of bed thickness when the thickness is larger than the critical thickness.

Keywords

granular matter / impact peak / buffer capacity / discrete element method / critical thickness

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Higher Education Press and Springer-Verlag Berlin Heidelberg