Lattice structures have several advantageous properties, including light weight, high specific strength, and high specific stiffness. 3D printing technology was used to prepare pyramidal structures with different strut diameters. Here, compression tests were used to study the effect of the relative density on the structural deformation mechanism, compression performance, and energy absorption characteristics. The 3D printed pyramidal structures with different strut diameters have three post-failure modes: fracture, stable deforming, and softening. The compression performance of the structure is greater at higher relative densities. The structure absorbs energy well at appropriate relative densities. The finite element method was used to characterize the compression behaviors of the lattice structures. A comparison of structures prepared by previous studies reveals that the 3D printed pyramidal structures prepared in this study have excellent energy absorption capacity in low-density structures.

晶格结构具有几个有利的特性，包括重量轻，高比强度和高比刚度。3D打印技术用于制备具有不同支柱直径的金字塔结构。在这里，压缩试验被用来研究相对密度对结构变形机理，压缩性能和能量吸收特性的影响。具有不同支杆直径的3D打印金字塔结构具有三种破坏后模式：断裂，稳定变形和软化。在较高的相对密度下，结构的压缩性能更高。该结构以适当的相对密度很好地吸收能量。有限元方法被用来表征晶格结构的压缩行为。