THE INFLUENCE OF LATTICE STRUCTURES ON THE DYNAMIC PERFORMANCE OF 3D METAL HOLLOW SPHERE FOAMS WITH DENSITY GRADIENT

In this paper, the dynamic properties of 3D metal hollow sphere (MHS) foams with simple cubic lattice, body-centred cubic lattice or face-centred cubic lattice are studied to investigate the influence of the lattice structures. The results show that the variation of the lattices changes the force and deformation modes of the spheres (two-ball model, five-ball model and transformation between them). The MHS foams with FCC lattice show great capability of energy absorption. Moreover, the MHS foams with FCC lattice are more sensitive to the variation of the density gradient. The results provide some theoretical guidance on the multi-objective optimization design of impact dynamic properties of porous materials.