弹体正侵彻钢筋混凝土靶的试验及数值模拟研究

A series of experiments were carried out on a 156-mm-caliber oval projectile penetrating into an reinforced concrete target. With the pre-arranged pressure sensors, the pressures at different positions in the concrete targets were obtained during the penetration. Combined with numerical simulation, the damaged regions in the concrete targets and the stress states of the steel bars at different positions were analyzed. The results show that the pressures in the concrete nearby penetration trajectories are highest and the corresponding peak pulses are obvious. With the increases of the distances from the penetration trajectories, the peak pulses decrease and the pulse widths increase, the shape of the stress pulses changes from peak to relatively flat waveforms. The stress of the steel bar in the crushed region reaches its yield strength, the steel in the cracked region is in an elastic state, and the stress of the steel bar in the elastic region and the undisturbed region can be neglected.