High-speed impact performance of a high-performance concrete with functionally gradient structure designs

Ultra-high performance concrete is characterized by its high strength and high toughness, and ceramsite concrete can absorb energy and function as a buffer. Based on the mechanical properties of both, the two kinds of concrete materials are combined in the spatial structure, and three structural models, namely, gradient structure group target, double stacked structure group target, and single material structure group target, are designed and prepared. Then, the dynamic characteristics and protection performance of the three targets are compared and analyzed via experiments and numerical simulations under different projectile penetration velocities. The results show that because the two transition layers and the fiber layer between the interfaces are set in the gradient structure group target, which largely improves the resistance in the process of projectile penetration, the cratering area, cratering depth, and penetration depth of the gradient structure group target are the smallest under the same projectile penetration velocity. The larger the projectile penetration velocity is, the more outstanding the penetration resistance of the gradient structure group target is.