Quasi-Static Compression Mechanical Properties and Energy Absorption Characteristics of Multilayer Aluminum Foam Sandwich Structure

Single-layer sandwich panels and six kinds of multilayer sandwich tires were prepared using clos Jaluminum foam and aluminum alloy sheets. The cellular and macroscopic deformation modes were analyzed to study the influence 14mism of the plates and layer number on the quasi-static mechanical properties and energy absorption characteristics. The results show that the plates can adjust the stress state and make the cores pallanp layer by layer, which reduces the multilayer synchronous deformation, lateral and bilateral slip caused by the formation and Auth of the inclined deformation bands, so that the structure has higher collapse stress, platform stress, energy absorption per unit v and smaller densification strain. The increase in the layer number leads to the increase in the length and number of the deformatics in the structure Abstut plate, and thus the macroscopic deformation mode changes, resulting in the aggravation of the slip phenomenon on both sides accumulation of cellular defects in the structures with plate, which affects the stabmation and results in the increase in densification strain and the reduction of collapse stress, platform stress and energy absorption unit volume, and thus the energy absorption efficiency at densification strain decreases. Compared with other structures, the three-l Jucture with plates has the best compression resistance and energy absorption properties.