Page 6 - May-June 2018print
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Warhead before detonation                  Aerosol cloud formation                 Aerosol detonation
                                         FAE Warhead functioning

Types of Kill Mechanisms                     Fragmentation Charges                 such high pressures. Liner collapses
                                                                                   hydrodynamically onto the axis and
   Kill mechanisms based on high            Fragmentation charges are              further forms into a hyper velocity jet.
explosives have been categorised into    similar to blast charges and the          This hyper velocity jet made of high
five types as follows:                   energy liberated on detonation of the     density material penetrates the targets
â—Š	 Blast charges                         explosive is carried by the high density  hydrodynamically owing to its large
â—Š	 Fragmentation charges                 fragments surrounding the explosive       kinetic energy associated with it.
â—Š	 Shaped charges                        column. These fragments are lethal
â—Š	 Projectile charges                    at even large distances and typically       Projectile Charges and Flat
â—Š	 Flat cone charges                     employed against soft skinned targets.              Cone Charges

   Underlying mechanism in all                    Shaped Charges                      These are variants of shaped charge
the above types is same and that                                                   in which the geometry of metallic liner
is conversion of chemical energy            Shaped charge consists of a            is altered to obtain either a projectile
contained in the high explosive to       cylindrical explosive charge having a     or a short metallic jet moving at high
mechanical energy in the form of         conical cavity on one end generally       velocities.
either kinetic energy or blast pressure  lined with a metallic liner and
energy.                                  detonated on the opposite side                     Explosively formed projectile
                                         exactly along the axis of liner. On
          Blast Charges                  detonation of shaped charge, high
                                         pressure detonation wave sweeps
   These are simply high explosives      across the liner surface. Pressure
contained in a thin casing made of       in the detonation wave is typically
metals or non-metals. When the           over a million atmosphere and
explosive contained in the casing is     strength of the metallic liner is
detonated, due to the sudden release     nearly negligible when it encounters
of energy, high pressure waves are
generated with the evolution of large
amount of gaseous products. Energy
contained in the blast waves are
responsible for the kill of target.

t0-Blast wave arrival time
td-Positive pressure duration

A typical blast wave profile             Shaped charge jet formation

6 May-June 2018 								Warhead for Missiles, Torpedoes and Rockets
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