Numerical Simulation On Projectile's Terminal Ballistics

This paper uses the numerical simulation program LS-DYNA simulates the process ofthe low penetration projectiles entering the water and the projectile with high rotating speedpenetrating into the moving target. At first, designing two new projectiles based on thehomemade 9mm handgun projectile, and making the new projectiles have the capability ofhigh execution and low penetration. The designed two new projectiles are projectile with softtine and projectile with empty tine. Because most biological tissues contain about 80% water,and their densities are almost the same to the water. So some phenomenon are simulated bythe water in the wound ballistics. This paper uses the water to replace the human biologicaltissue, simulates the three projectiles entering the water by LS-DYNA, and acquires thevelocity attenuation curve, displacement curve, reduction of the total energy and theinstantaneous cavum. The acquired velocity attenuation curve is almost the same to thevelocity attenuation curve, which is theoretically calculated. Through comparing with theresults, it could be concluded that the projectile with empty tine is the best in the ability oflow penetration and high execution.Now, the numerical simulation of the projectile penetrating into the target is onlyconsidering the projectile without rotating speed and the target without moving speed at homeand abroad. But in practically warlike environment, the projectile will have high rotatingspeed to keep its exterior ballistic stability, and the target in fact is mostly moving. So thispaper proposes a finite model to simulate the projectile with high rotating speed penetratinginto the moving target, and proposes a method to calculate the projectile's angle of rotationand the ballistic trajectory's migration. Using the numerical simulation program LS-DYNA tosimulate the process of the 7.62mm projectile with high rotating speed penetrating into themoving target. Through comparing with the results by simulation to study the effects of theprojectile's final velocity, the angle of rotation and the ballistic trajectory's migration withdifferent projectile's rotating speeds, different target's moving speeds and differentpenetration angles. The conclusions have some instructional meanings in studying the processof projectile with high rotating speed penetrating into the moving target and designing thelight-duty two-double armor.