This memorandum examines the effect of the erosion strain parameter on the numerical simulation results of the penetration of two different projectile/target systems. This parameter permits the failure of the material and numerically allows the penetration of the target. The first system examined consists of the SS109 5.56-mm bullet striking a 10.8-mm 6061-T6 aluminium target while the second s...

We present experimental measurements of penetration depths for the impact of spheres into wetted granular media. We observe that the penetration depth in the liquid saturated case scales with projectile density, size, and drop height in a fashion consistent with the scaling observed in the dry case, but with smaller penetrations. Neither viscous drag nor density effects can explain the enhancem...

Amodel is proposed for describing the penetration of a monolithic semi-infinite and finite FRP laminates struck transversely by a rigid projectile with an arbitrary 3-D shape. Relationships for calculating the characteristics of penetration and perforation (ballistic limit velocity, depth of penetration, etc.) are derived. It is showed that some typical problems of optimization of the shape of ...