Additive manufacturing enables the design of complicated structures that would not be feasible to manufacture otherwise. Novel bio-inspired 3D structures were digitally produced employing Voronoi tessellation techniques and manufactured by selective laser sintering from polyamide. Impact tests were performed to analyze the impact absorption capacity of these structures, while FEM modeling offered insights on the fracture mechanisms and the prediction of the material response, which proved to be highly sensitive to strain rate. The results show a considerable impact attenuation in the case of 80% porosity and strut radius of 0.5 mm, encountering small transmitted peak force and smooth deceleration.

增材制造可以设计复杂的结构，否则无法制造。新型仿生 3D 结构采用 Voronoi 镶嵌技术数字化生产，并通过聚酰胺选择性激光烧结制造。进行了冲击测试以分析这些结构的冲击吸收能力，而 FEM 建模提供了对断裂机制和材料响应预测的见解，这被证明对应变率高度敏感。结果表明，在 80% 的孔隙率和 0.5 mm 的支柱半径的情况下，冲击衰减相当大，遇到较小的传递峰值力和平稳减速。