Explosively formed penetrator (EFP)
As you observe in the picture, the warhead is composed of Explosive Material and Liner and the detonator that has been displayed by red color
Actually , this process is special type of shaped charge and its also called Explosively formed projectile and is abbreviated EFP
In this question, the explosive material is the Composition B, and the composition B is a compound of RDX and TNT
In fact, after the explosion, the pressure behind the liner increases to such an extent that the liner is thrown at a very high speed
In this picture, you can observe deformation of liner during the process of detonation
When the explosive detonates, a lot of pressure is applied to the back of the liner causing liner to be thrown forward at a great speed. actually, when explosive explodes, a great pressure is applied to the back of the linear causing its speed to increase excessively. and as you observe here, the ultimate speed is 1116 m/s that the liner can penetrate in to targets
In this diagram , you can see the velocity of linear
As you know, two points are so important in shaped charge process. one is final shape of liner and second is its ultimate speed
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