Experimental study on penetration-resistance characteristics of honeycomb shelter

To study the hexagonal honeycomb shelter's penetration-resistance performance, a series of experiments were done using a kind of projectile with a diameter of 15 mm. Compared with the steel reinforced concrete shelter, the penetration damage done to the honeycomb shelter occurs inside the hexagonal component element, the damaged area is relatively smaller, and the angle of the yaw in the honeycomb shelter is larger than the one found in the steel reinforced concrete shelter. Analyzing the experimental results based on the theory of the stress wave propagation, we studied the mechanism of the shelter's strength enhancement and found that, due to the steel pipe's restriction and countercheck, the compressive strength of the concrete and the resistance of the projectile were amplified in the process of the projectile's penetration, thus reducing the projectile's damaging effect on the honeycomb shelter.