The Voronoi-based random honeycomb cylindrical shell with specific mesostructures was constructed programmatically and additively manufactured on material of polylactide (PLA). Then, a new PLA random honeycomb-filled double circular tube (PLA-RHFDCT) was proposed. The mechanical performance of the PLA-RHFDCTs in terms of deformation mode, crushing response and energy absorption was studied experimentally by carrying out the quasi-static axial compression loading. A parametric study was performed to evaluate the influence of tube sizes and the mesostructures of honeycomb cores on the crushing resistance and energy absorption capacity of the PLA-RHFDCTs. Results indicate that the cell configuration dominates the deformation modes of PLA honeycomb cylindrical structure. For the PLA-RHFDCTs, the deformation and the bearing capacity are mainly determined by the wall thicknesses of tubes. The introduction of PLA honeycomb core enhances the mechanical performance and affects the localized buckling of the PLA-RHFDCTs due to both the in-plane and out-of-plane crushing resistance of honeycomb core structures. Compared with the parameter of cell irregularity, the relative density of honeycomb cylindrical cores exhibits a higher influence on the energy absorption performance of the PLA-RHFDCTs, though the relatively low crushing strength of PLA honeycomb cylindrical structures.

以编程方式构造基于Voronoi的具有特定介观结构的蜂窝状圆柱形圆柱壳，并在聚丙交酯（PLA）材料上进行加法制造。然后，提出了一种新的PLA无规蜂窝填充双圆管（PLA-RHFDCT）。通过进行准静态轴向压缩载荷实验研究了PLA-RHFDCTs在变形模式，破碎响应和能量吸收方面的力学性能。进行了参数研究，以评估管尺寸和蜂窝芯的介孔结构对PLA-RHFDCT的抗压碎性和能量吸收能力的影响。结果表明，单元结构主导了PLA蜂窝圆柱结构的变形模式。对于PLA-RHFDCT，变形和承载能力主要取决于管的壁厚。PLA蜂窝芯的引入增强了机械性能，并由于蜂窝芯结构的面内和面外抗压性而影响了PLA-RHFDCT的局部屈曲。与蜂窝状不规则参数相比，蜂窝状圆柱芯的相对密度对PLA-RHFDCTs的能量吸收性能表现出更高的影响，尽管PLA蜂窝状圆柱结构的抗碎强度相对较低。