Experimental and Numerical Characterization of Granular Material Until Shock Loading

Abstract

AbstractThe present work describes the characterization of two different granular materials, a fine cohesive and a coarse cohesionless soil, with regard to their behavior under high-rate loading. The conditions range from quasi-static ($$10^{5}$$ 10 5 s$$^{-1}$$ - 1 ) to dynamic strength ($$10^{2}$$ 10 2 s$$^{-1}$$ - 1 ) using a standard press and a Split-Hopkinson Bar (SHB) with a triaxial pressure cell. Furthermore, shock compression ($$10^{5}$$ 10 5 s$$^{-1}$$ - 1 ) is investigated in a newly developed plate impact capsule. The experimental data is used to parameterize both types of soils with two different dynamic material descriptions, a simple model with Drucker–Prager Strength and p-$$\upalpha$$ α EOS and, partly extending from there, a model with piecewise linear dependencies for both volumetric compaction and strength. The reproduction quality of both material models is quantitatively assessed using Finite Element simulations of the dynamic tests and discussed. They can potentially serve in future numerical analyses of complex transient dynamic events, such as explosively-driven ground shock or high-velocity penetration into the soil.