Abstract The reactive projectile presents a tremendous potential to induce the combined damage effect of kinetic energy and chemical plate. A series ballistic impact experiments numerical simulation studies were carried out study penetration behavior against TC4 experimental results showed that with velocity increasing from 537m/s 682m/s, mode plate gradually changes bulge, cross crack plug. Ac...

In order to apply the ultra-high-performance fibre-reinforced concrete (UHPFRC) in constructions of ballistic protective structures, impact resistance UHPFRC has been investigated experimentally by conducting high-speed projectile penetration tests. 5 mixtures with basalt and corundum aggregates various grain size have prepared subjected quasi-static 7.62 x 54R B32 API load using striking veloc...

Although not very common, forensic investigation related to projectile ricochet on water can be required when undesirable collateral damage occurs. Predicting the ricochet behavior of a projectile is challenging owing to numerous parameters involved: impact velocity, incident angle, projectile stability, angular velocity, etc. Ricochet characteristics of different projectiles (K50 BMG, 0.5-cal ...

in this article, finite element method and ale formulation were used to numerically simulate impact of low-velocity specific projectiles with water surface. for the simulation, ls-dyna finite element code was used. material models which were used to express behavior of air and water included null material model. for the projectile, plastic-kinematics material model was applied. mie-gruneisen eq...

Between the onset of projectile fragmentation and the assumption of rear wall failure due to an impulsive load, multi-wall ballistic limit equations are linearly interpolated to provide reasonable yet conservative predictions of perforation thresholds with conveniently simple mathematics. Although low velocity and hypervelocity regime predictions are based on analytical expressions, there is no...

Air guns (AGs) use air or another compressed gas to propel a projectile. Different injuries may occur in children due to their body structure, which is less-resistant with thin soft tissue coverage that can be easily penetrated by an AG shot. We present 3 cases of pediatric AG shot injury. The first-case had right lumber deep tissue penetration of AG pallet without internal damage, the second-c...

Abstract The penetration judgment of the projectile to target is vital evaluate its damage ability. Based on similarity residual velocity, thickness equivalent model plates with different materials proposed in this paper. Simulation parameters are validated by physical experiments. Then a series numerical simulations carried out 30CrMnSiNi2A projectiles penetrating 921A and Q235 steel plates. R...

A two-scale approach based on eigendeformation-based homogenization is explored to predict the behavior of concrete targets subjected to impact loading by high speed projectiles. The method allows to account for micromechanical features of concrete at a computational cost comparable to single scale phenomenological models of concrete. The inelastic behavior of concrete is modeled using three ty...

The stopping mechanisms of relativistic electron beams in superdense and partially degenerate electron fluid targets are investigated in the framework of the fast ignitor concept for inertial confinement fusion. In order to comply with specific demands in this area, we focus attention on the target partial degeneracy parameter theta= T(e) / T(f) , in terms of the thermal to Fermi temperature ra...

An object moving in a fluid experiences a drag force that depends on its velocity, shape and the properties of the medium. From this simplest case to the motion of a flock of birds or a school of fish, the drag forces and the hydrodynamic interactions determine the full dynamics of the system. Similar drag forces appear when a single projectile impacts and moves through a granular medium, and t...