Projectile penetration in soil theoretical model

Abstract EN

In this paper, a theoretical approach was developed to determine the maximum depth of penetration of an impacting projectile on earth soil.

The theory was formulated according to the dynamic spherical cavity expansion on a concentrically layered compressive media.

The layer exhibit elasto-plastic response with non-linear strain hardening under shear slress and ideal locking compressibility under hydrostatic stress such that the transition from elastic to plastic state is accompanied by small but finite volumetric strain known as the locking strain.

The projectile is assumed to be rigid and non-deformable throughout the penetration process.

The theory predicts relatively well with the measured data for non-deformable projectiles and over predicts the penetration depth in the case of deformable projectile.