Numerical study on impact resistance of double-layer aluminum foam curved sandwich plates

The dynamic response of curved sandwich plates with double-layer aluminum foam under impact loading is simulated by LS-DYNA finite element software. The impact resistance of single and double layers aluminum foam curved sandwich plates with the same thickness is compared. The influence of the thickness of the face-sheet and the thickness of the core layer on the deformation and energy absorption capacity of the double-layer sandwich structure is analyzed. The results show that the overall mechanical properties of the double-layer curved sandwich plates are better than those of the single layer curved sandwich plates with equal thickness; the thin front and middle plates can improve the energy absorption efficiency of the aluminum foam core, thereby enhancing the impact resistance of the sandwich structure; Increasing the thickness of the upper and lower core layers can improve the deformation of the double-layered curved sandwich plates, but the overall energy dissipation of the structure is reduced, and the upper core is the main energy absorbing component. The research results have some guiding significance for the application and optimization design of curved sandwich plates with double-layer aluminum foam in practical engineering.