Experimental investigation on the concrete damage behaviorunder the shaped-charge loading

The research of shaped-charge penetrating concrete target focuses on the material and the structure of the shaped-charge, penetration depth and penetration aperture size, but seldom involves the destruction of a concrete target board. However, the determination of whose overall damage behavior plays a significant role in the penetration effectiveness evaluation of the shaped-charge on the concrete. In the present work, to make up for this defect, we carried out experiments of the heavy-caliber shaped-charges penetrating a large-size concrete target. After the experiment, we cut the concrete target to assess its damage under the shaped-charge loading. We evaluated the concrete target damage at different locations from inside the target and measured the hole diameters at different locations. Cube concrete specimens with a side length of 10 cm were also obtained in the same damaged section across the hole center. The strength test results show that the reflective stretching damage radius is about 110 cm; the concrete damage is severe within a 100 cm radius, and the compressive strength of the concrete specimen at the border within this radius range is about 30 MPa, which is about 40% of the original compressive strength; the compressive strengths of the concrete specimens within the scope of the radius 100-140 cm are similar and are all around 46 MPa, which is about 72% of the original compressive strength; when the radius is larger than 140 cm, the concrete damage is negligible.