Internal blast resistance of sandwich cylinder with lattice cores

This work focuses on investigation of the internal blast resistance of metal sandwich cylinder with lattice cores. Six types of the geometries designed by the square, hexagonal, semi-re-entrant, re-entrant, sinusoidal and Kagome honeycombs are selected as the cores of sandwich cylinders. Effects of core geometry, core arrangement, core wall thickness, shell mass distribution and cover on blast resistance of sandwich cylinders are explored and identified. Results reveal that both the core geometry and arrangement have significant effects on the blast resistance and deformation mechanism of sandwich cylinders. Thick core wall decreases the energy absorption efficiency of lattice cores. The asymmetrical design of the inner and outer shells enhances the internal blast resistance of the sandwich cylinders. The covers added on the sandwich cylinder result in increasing the deformation degree and energy absorption of sandwich cylinders with various lattice cores.