Abstract

This paper focuses on the energy absorption of additively manufactured or 3D printed lattice-core sandwich structures of different configurations. The compressive behavior of 3D lattice structures with rhombic dodecahedron unit cells is investigated at Quasi-static loading. A parametric analysis was performed, using a Box-Behnken design (BBD), as a method for design of experiments (DOE). Then, the influence of the angle between struts and their diameter were investigated. It was observed from experimental data that the angle between struts had the highest degree of influence on the specific energy absorption. The results showed that the diameter of struts has been the most influential parameter to increase mean and peak forces. The results from using the design expert software showed the optimal specific energy absorption and peak force to be 2.1014 J/gr and 2224.87 N, respectively.

摘要

本文重点研究不同配置的增材制造或 3D 打印的格芯夹层结构的能量吸收。在准静态载荷下研究了具有菱形十二面体晶胞的 3D 晶格结构的压缩行为。使用 Box-Behnken 设计 (BBD) 进行参数分析，作为实验设计 (DOE) 的方法。然后，研究了支柱之间的角度及其直径的影响。从实验数据观察到，支柱之间的角度对比能量吸收的影响程度最高。结果表明，支柱的直径一直是增加平均力和峰值力的最有影响的参数。使用设计专家软件的结果表明，最佳比能量吸收和峰值力为 2。