PSI - Issue 71

Nikhil Andraskar et al. / Procedia Structural Integrity 71 (2025) 158–163

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(d) Impact velocity 400 m/s

(e) Impact velocity 500 m/s

(f) Impact velocity 800 m/s

Fig. 4. The damage view of the alumina target at different impact velocity Table 1. parameters obtained at different impact velocities of the projectile

Initial Kinetic energy (Joule)

Kinetic energy absorbed (Joule)

Impact velocity (m/s)

Residual velocity (m/s)

Sr. No.

Impact force (kN)

1 2 3 4 5 6

100 200 300 400 500 800

0 0 0

5.8 21 54 85 147 370

5.8 21 54 79 127 310

27 47 50 75

57

128 407

120 156

5. Conclusion In this study, the ballistic performance of monolithic alumina ceramic was studied against fragment-simulating projectiles using finite element simulations. Different parameters like, the size of the fracture conoid zone, residual projectile velocity, energy absorption of the target, and impact force on the plate due to projectile impact have been studied. The conclusions drawn from the study are presented below. • The size of the fracture conoid zone forming in the ceramic increased as the impact velocity of the projectile increased up to velocity of 400 m/s. When impact speed was raised above 400 m/s, the size of the zone decreased owing to the lesser interaction time between the projectile and the target.