Seemingly harmless low velocity weapons like air guns sometimes may cause deep penetration of tissues leading to serious disability or even death especially in children. Deep penetration is rare in adults. We present a case of penetration of anterior skull base by air gun pellet in an adult in whom the projectile could not be retrieved initially but became accessible for removal due to spontane...

Numerous investigations recorded a dramatic decrease in penetration depth at hypervelocity. The is due to the severe mass loss of projectile. mechanics are complicated, so entirely theoretical model still absent. In this paper, we derive semitheoretical formula for by solving equation motion projectile during penetration. result shows that hypervelocity accords with power law. Furthermore, obta...

The main purpose of the present work is multi-objective shape optimization of a projectile tip for impacting and normal penetrating. Velocity drop, weight and inner volume of projectile have been considered as three conflicting objective functions.  For this purpose, at the first step, finite element modeling was done using ABAQUS/Explicit and projectile penetration was examined in different ge...

The current body armor systems manufactured using ballistic fibers are not performing as theoretical results predict and are causing injuries. The actual maximum projectile penetration speed that the body armor can endure is significantly lower than the theoretical maximum speed, thus causing a costly build-test relationship that is not aided with modeling design efforts. The main aim of this r...

Fundamental processes induced in a thick organic system composed of long, well-organized linear molecules by an impact of 5–20 keV C60 are investigated. The organic system is represented by Langmuir– Blodgett multilayers formed from bariated molecules of arachidic acid. The thickness of the system varies between 2 and 16 nm. Coarse-grained molecular dynamics computer simulations are applied to ...

To explore the anti-penetration performance of specially shaped ceramic/metal composite armor, such an armor is designed and fabricated using a semi-cylindrical projectile resistant ceramic metal back plate, its for 12.7 mm armor-piercing incendiary (API) (also known as 0.50 caliber API projectile) investigated experimentally numerically. The results show that due to significant attitude deflec...