Abstract：In order to improve the impact resistance of metal honeycomb structures, three new types of impact protection structures, namely, closed bent honeycomb, concave filled honeycomb, and star-shaped curved honeycomb, are proposed. Numerical simulations of the honeycomb impact resistance were carried out using the ANSYS/LS-DYNA finite element method, and the deformation patterns and energy absorption capacities of the three honeycombs were analyzed under different impact velocities. The results show that the deformation patterns of the three honeycomb structures are related to the cellular element structure and impact velocity. The nominal stress and energy absorption efficiency of the closed-bending honeycomb are better than those of the other structures; the geometrical parameters of the honeycomb cell elements do not affect the trend of the nominal stress-strain curves. The larger the bending angle of the closed bend honeycomb, the higher the value of platform stress and the lower the value of dense strain. Under the medium-velocity impact, the platform stress of 60° closed bend honeycomb structure increased by 19.5% compared with that of 45° structure; increasing the relative density can effectively improve the energy absorption efficiency of the honeycomb structure, and the specific energy absorption of the high-density 60° closed-bend honeycomb structure increased by 207.6% compared with that of the low-density.
2025, Vol. 46 
