Effects of the Gridding to Numerical Simulation of the Armour-Piercing Warhead Penetration through the Steel Target - Advances in Image and Graphics Technologies - page 355

Fig. 3. WarheadVelocityalong with Time
Change Course Curve in Different k Value

Fig. 4. Warheadimpuse along with time
change course curve in different k value

The numerical simulation result showed: the velocity and impulse of the
armor-piercing warhead penetration the target wear gradually decrease because it was
underwent resistance of the target in the armor-piercing warhead penetration the
target [3] . The decrease extent of the velocity and impulse was continually increased. As
the k value was equal to 4.0 and 5.0, the calculative result of velocity and impulse was
basically consistent, the most error was about 0.5 and it caught be neglected. As the k
value was equal to 10.0, the velocity and impulse change trend wear basically same.
Compared with the k value be equal to 4.0 and 5.0, the numerical result was basically
consistent. But when the k value was equal to 20, the change of the armor-piercing
warhead velocity and impulse along with time was gradually decrease, and the
numerical result basically consistent comparing with the k value be less than 10.0. It was
showed by theory and practice that the change of the armor-piercing warhead
penetration velocity and impulse was rather tempered because in the press of the
armor-piercing warhead penetration the target, the condition was built for the
armor-piercing warhead penetration,it included relative steady high pressure, high strain
and high distortion speed state in the target. So, the change of warhead velocity
and impulse along with time was rather reasonable when the k value was equal to 4.0,5.0
and 10.0.

3.2 Effect of Gridding to Damage Area of the Target

The material model of steel included material damage description, Fig.5 showed the
target damage state in different k value. Table.3 showed calculative result of the target
damage area.