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 10cm 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 110cm; the concrete damage is severe within a 100cm radius, and the compressive strength of the concrete specimen at the border within this radius range is about 30MPa, which is about 40% of the original compressive strength; the compressive strengths of the concrete specimens within the scope of the radius 100-140cm are similar and are all around 46MPa, which is about 72% of the original compressive strength; when the radius is larger than 140 cm, the concrete damage is negligible.