Projectile

About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.

Armor penetrating projectile

Abstract: A projectile for heavy armor formed of a casing having at its forward end a double cone construction, one surrounding the other, to provide an annular space between the cones. This space is filled with an explosive. The inner cone is located nearer the forward end of the projectile and is provided with a series of flutes extending from the apex toward the outer edge. The recesses formed by the flutes contain a part of the explosive provided within the annular space between the cones. Thus, the flutes form shaped charges and since the interior of the cone is presented to the forward end of the projectile, the force of the explosive on contact with the armor produces not only an opening in the target but also linear gashes which extend radially outward from the opening. The remainder of the projectile is formed of a hollow penetrator body which contains explosive for internal blasting and there is a jet propelling explosive at the rear end of the casing for propelling the projectile through the air. The opening blasted in the armor by the double cone structure may be too small for the penetrator body to enter readily but the gashed edge allows the penetrator to bend the cut portions inwardly and thus permit easy access for the penetrator to deliver its explosive to the rear side of the armor.

Extended range of a gun launched smart projectile using controllable canards

Abstract: This effort investigates the extent to which moveable canards can extend the range of indirect fire munitions using both projectile body and canard lift. Implications on terminal velocity and time of flight using this mechanism to extend range are examined for various canard configurations. Performance predictions are conducted using a six-degree-of-freedom simulation model that has previously been validated against range data. The projectile dynamic equations are formed in the body frame and aerodynamic loads from the body and canards are Mach number and angle of attack dependent. The projectile body aerodynamic moments include unsteady aerodynamic damping. The focus of the study is directed toward low cost competent munitions that extend range and as such a simple flight control system is considered which utilizes only timer, roll rate, and roll attitude inputs.

Ballistic performances of concrete targets subjected to long projectile impact

Abstract: Concrete is a widely used material in the construction of strategic and important structures such as nuclear containments, bridges, storage structures and military bunkers. In the present study perforation experiments and simulations on finite element code ABAQUS/Explicit have been carried out to understand the behavior of concrete against projectile impact. Penetration tests were conducted on square (450 mm×450 mm) targets of plain and reinforced concrete of unconfined compressive strength 48 MPa. To investigate the effect of reinforcement, 8 mm diameter steel grid was incorporated at the center of thickness of the target. The targets were subjected to normal impact by 0.5 and 1 kg ogival nosed hardened steel projectiles of caliber radius head (CRH) 3 and length to diameter (l/d) ratio 23.7 and 11.8 respectively. The velocity regime of the projectile was considered in the range 43–178 m/s. The results thus obtained were presented and influence there on the ballistic performance due to the variation in l/d ratio of projectiles have been discussed. In comparison to plain concrete, the ballistic limit of the reinforced concrete target was found to have increased by 14%. A fair agreement was found between actual and predicted residual velocities obtained in the present study. The actual and simulated ballistic limit against 0.5 kg projectile differed by 10.8% and 5.1% for plain and reinforced concrete target respectively. This deviation has been found to be 16.1% and 6.7% respectively against 1 kg projectile.