This study investigates the penetration process of a tandem warhead with a follow-through projectile into a pre-drilled reinforced-concrete (RC) target. Based on cavity-expansion theory and the resistance of reinforcing bars, an analytical model for dynamic resistance during penetration was established by introducing target-plate damage coefficients and projectile–target dynamic-friction coefficients. An algorithmic workflow covering three typical projectile–target intersection positions was proposed. This model was validated through experimental and numerical simulations, analyzing the penetration patterns of follow-through projectiles into pre-drilled target plates. Findings indicate: the dynamic-resistance analytical model exhibits good agreement with experimental data and numerical simulations, demonstrating reasonable accuracy; follow-through projectiles exhibit distinct overload characteristics during initial penetration, followed by a brief overload peak upon engaging the reinforcement until its failure stage; projectiles exhibit negligible penetration capability against small-aperture target plates, with penetration depth significantly increasing with projectile velocity or relative aperture size; when both the initial velocity of the follow-through projectile and the target-plate aperture are large, the residual velocity and penetration-time distribution are relatively small. These findings provide theoretical reference for follow-through projectile design and fuze delay-detonation strategies.
Hao et al. (Mon,) studied this question.