Research On The Characteristic Of Kinetic Energy Projectile Penetrating Into Target

Modern technology was changing rapidly. To be a contradictory opposite synthesis,Weaponry not only needed to increase penetration ability to combat the target effectively, butalso needed to enhance the ability of resist penetration to achieve effective protection againstincoming.researching and exploring stress wave propagation and structural dynamicresponse rule when the projectile moving in the target body, and finding the manner tomaximize the penetration effect of weaponry, and finding the way to cleverly design andoptimize protection structure provided the necessary theoretical premise and designreference. Therefore in the environment of an urgent need to lose weight in weaponry, theresearch on the performance of the new lightweight materials penetration behavior was veryimportant. This paper used the methods of piercing penetration experiments, analyzing andresearching the performance of different projectiles penetrating lightweight materials, toprovide data for reference of design studies that kinetic energy projectile penetrated thearmoring.The penetrating experiment used two different head shape high hardness rigid projectile of38CrSi to collide the same kind of lightweight6061aluminum alloy target of differentstructures, getting the curve fitting of remaining projectile velocity-initial velocity and thecorresponding speed limited under a variety of design conditions, exploring the relationshipbetween part of mechanical index and initial velocity when projectiles penetrating the targetbody, analyzing failure mode and the target injury characteristics.The results showed that under the premise of the experimental setup, the ballistic limit ofblunt projectile penetrating into the target body sequentially increased by (1+0.5+0.5)â†'(0.5+1+0.5)â†'(0.5+0.5+0.5+0.5)â†'(1+1)â†'(1.5+0.5)â†'(0.5+0.5+1)â†'(0.5+1.5)â†'(2). Theresults also showed that projectile got the penetration optimal performance to penetratetarget structure of (1+0.5+0.5) mm, and the single target body of2mm got the optimalresisting projectiles penetration. When blunt projectile was penetrating thin target, withinitial speed from high to low gradually approaching the ballistic limit speed, the duration ofaction that projectile penetrate the same structure target was generally rising. The role oftime that projectile penetrate target body of different structures showed a substantiallyupward trend with ballistic limit increasing. According to its degree of failure, the targetcould generally show an overall dish deformation accompanied by local bending depression,then an overall dish deformation accompanied by local tensile tear, then incomplete pluggingdestruction along with local bending depressions or partial tensile tear, and finally overallsmall deformation completely plugging.The results showed that under the premise of the experimental setup, the ballistic limit ofoval head projectile penetrating into the target body sequentially increased by(0.5+0.5+0.5+0.5)â†'(1+0.5+0.5)â†'(0.5+1.5)â†'(1.5+0.5)â†'(0.5+1+0.5)â†'(0.5+0.5+1)â†'(2)â†'(1+1). The results also showed that projectile got the penetration optimal performance topenetrate target structure of (0.5+0.5+0.5+0.5) mm, and the single target body of (1+1) mmgot the optimal resisting projectiles penetration. When oval projectile was penetrating thintarget, with initial speed from high to low gradually approaching the ballistic limit speed, theduration of action that projectile penetrate the same structure target was generally rising. Theduration of action that projectile penetrates different structure targets were generally risingalong with ballistic limit increasing. Target body failure mode basically showed the overall bending depression accompanied by form of local petaling.Overall the penetration performance of kinetic energy projectiles of oval head was betterthan blunt head. Among them ballistic limit speed of flathead projectile penetrating singletarget was highest and longest duration of action. On the contrary, ballistic limit speed of thefour laminated target was the lowest and shortest duration of action. If it was needed toimprove the penetration performance of projectile, in the premise of the initial speedremaining the same, the only indicator could be artificially controlled was the penetrationtime, residual velocity and penetration forces could not controlled by projectile, by reducingthe penetration time to improve the penetration performance. There were two ways toachieve the purpose of reducing penetration time. First, change the way to contact ofprojectile and target at the beginning of penetration. Second, at the end of penetration madeprojectile to penetrate through the target. Typically, the reduction of penetration time was theresult of both two ways.