An explanation is offered of the morphology of the entry wound caused by a firearm projectile, of the projectile path through the body, and of the exit wound. Special consideration is given to pressure and shock waves caused and their relation to the speed of the projectile (below, equal to or superior to Mach1). The action of both pressure and shock waves is very significant, more so than ts a...

Our experiments and molecular dynamics simulations on a projectile penetrating a two-dimensional granular medium reveal that the mean deceleration of the projectile is constant and proportional to the impact velocity. Thus, the time taken for a projectile to decelerate to a stop is independent of its impact velocity. The simulations show that the probability distribution function of forces on g...

in design of defense structures, concrete are often used to provide protection against incidental dynamic loadings such as the impact of a steel projectile. in the present study, a new analytical model is proposed to predict penetration depth into concrete targets by ogive nose projectile. hence, to ­ develop the model and simulate penetration of high velocity ogive-shape nose steel projectiles...

This is a 3-month-old infant with a diagnosis of acute cholecystitis presenting with projectile vomiting and no fever and no abdominal pain.

In this paper, our main objective is to present the use of Microsoft Software Excel 2007/2003 for teaching college and university level curriculum in science and engineering. In particular, we discuss two interesting and fascinating examples of interactive applications of Microsoft Excel targeted for undergraduate students in (1) computational physics and physics education, and in (2) computer ...

The analysis of the projectile effective charges and the stopping power with high intensity ion beams is of great fundamental interest. In contrast to the projectile charge state analysis outside the interaction volume (e.g., by means of particle detectors), the information about the projectile mean charge inside matter has to be obtained in an indirect manner, namely from the projectile radiat...

We report results from an empirical study of the anisotropic structure of eroding landscapes. By constructing a novel correlation function, we show quantitatively that small-scale channel-like features of landscapes are coupled to the large-scale structure of drainage basins. We show additionally that this two-scale interaction is scale-dependent. The latter observation suggests that a commonly...

A study of the kinematics of the α-d coincidences in the Li + Co system at a bombarding energy of Elab = 29.6 MeV is presented. With exclusive measurements performed over different angular intervals it is possible to identify the respective contributions of the sequential projectile breakup and direct projectile breakup components. A careful analysis using a semiclassical approach of these proc...

This work performs the analysis and simulation investigations of penetration behaviors of chisel-shape projectile. In analysis, the projectile is assumed to be a rigid body and the target plate is elastic-plastic material. By introducing the velocity potential function, the velocity field in target is first obtained. Then, the momentum equation is solved for determining the pressure and stress ...

This paper describes a new multidisciplinary computational study undertaken to model the flight trajectories and the free-flight aerodynamics of both a finned projectile at supersonic velocities and a spinning projectile at subsonic speeds with and without aerodynamic flow-control. Actual flight trajectories are computed using an advanced coupled computational fluid dynamics (CFD)/rigid body dy...