四方蜂窝夹芯圆柱壳在径向压缩载荷 作用下的力学行为研究

In order to investigate a structure with better mechanical properties，this paper proposes a square honeycomb lattice sandwich cylindrical shell structure，which combines metal thin-walled tubes and honeycomb structures.The mechanical behavior of the sandwich cylindrical shell structure with a square honeycomb as the core under radial compressive loads is studied by experimental and numerical methods.By comparing the results of two research methods，the accuracy of the finite element model is verified，and the deformation mode of the structure under radial compressive loads is analyzed，and the reinforcement mechanism of the structure is discussed.The results show that the rectangular honeycomb lattice sandwich cylin drical shell structure will undergo three deformation stages： elastic stage，plastic stage and collapsibility stage under radial compression load.Compared with the simple superposition of single-layer cylindrical shells and cores，the load-bearing and energy absorption of the square honeycomb lattice sandwich cylindrical shell are greatly improved.The structure is mainly coupled and reinforced by the formation of plastic hinges and the debonding between the square honeycomb core and the inner and outer cylindrical shells.