A modified method for estimating the stress state of granular materials in the passive confined pressure SHPB tests

The Split Hopkinson Pressure Bar (SHPB) is the common testing method used to investigate the high strain rates behavior of engineering materials. In this paper, a theoretical modified method for the determination of stress state in the passive confinement SHPB tests of granular materials is proposed to overcome the disadvantages in the previous works. To validate the modified method, the dynamical response of calcareous sand with two moisture...